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WO2015120780A1 - 一种天线及移动终端 - Google Patents

一种天线及移动终端 Download PDF

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Publication number
WO2015120780A1
WO2015120780A1 PCT/CN2015/072407 CN2015072407W WO2015120780A1 WO 2015120780 A1 WO2015120780 A1 WO 2015120780A1 CN 2015072407 W CN2015072407 W CN 2015072407W WO 2015120780 A1 WO2015120780 A1 WO 2015120780A1
Authority
WO
WIPO (PCT)
Prior art keywords
branch
radiator
antenna
electrically connected
capacitor structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/072407
Other languages
English (en)
French (fr)
Inventor
李建铭
王汉阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Device Co Ltd
Original Assignee
Huawei Device Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201410049276.9A external-priority patent/CN104836034B/zh
Application filed by Huawei Device Co Ltd filed Critical Huawei Device Co Ltd
Priority to EP22152153.7A priority Critical patent/EP4054002B1/en
Priority to US15/118,323 priority patent/US10069193B2/en
Priority to EP18193355.7A priority patent/EP3499641B1/en
Priority to EP15749179.6A priority patent/EP3091609B1/en
Publication of WO2015120780A1 publication Critical patent/WO2015120780A1/zh
Anticipated expiration legal-status Critical
Priority to US16/118,926 priority patent/US10879590B2/en
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas

Definitions

  • the present invention relates to the field of antenna technologies, and in particular, to an antenna and a mobile terminal.
  • the frequency bands commonly used in commercial at this stage include Global System of Mobile communication (GSM), GSM850 (824MHz to 894MHz), GSM900 (880MHz to 960MHz), and Global Positioning System (GPS). 1575MHz), Digital Video Broadcasting (DVB)-H (1670MHz ⁇ 1675MHz), Data Communication Subsystem (DCS) (1710MHz ⁇ 1880MHz), Personal Communications Service (PCS) ), Universal Mobile Telecommunications System (UMTS) or third-generation mobile communication technology (3rd-generation, 3G for short) (1920MHz ⁇ 2175MHz), Bluetooth or Wireless Local Area Networks (WLAN) 802.11b/g (2400MHz ⁇ 2484MHz) and other eight frequency bands;
  • Long Term Evolution (LTE) project is currently a popular working frequency band, its working frequency band is 698MHz ⁇ 960MHz, and 1710MHz ⁇ 2700MHz.
  • the antenna is a device for receiving and transmitting electromagnetic wave signals by the radio equipment, and with the advent of the fourth generation mobile communication, the bandwidth requirement for the terminal product is also getting higher and higher. Since the antenna realizes both signal propagation and energy radiation, it is based on frequency resonance, and the length of the antenna The degree is one quarter of the wavelength of the antenna resonance frequency, and now the terminal products are becoming thinner and lighter. How to design the antenna in a smaller and smaller space becomes an urgent problem to be solved.
  • Embodiments of the present invention provide an antenna and a mobile terminal that can design an antenna in a small space.
  • an embodiment of the present invention provides an antenna, including: a first radiator and a first capacitor structure;
  • the first end of the first radiator is electrically connected to the signal feeding end of the printed circuit board by the first capacitor structure, and the second end of the first radiator is electrically connected to the ground end of the printed circuit board
  • the first radiator, the first capacitor structure, the signal feeding end and the ground end form a first antenna for generating a first resonant frequency, and the electrical length of the first radiator is Less than or equal to one eighth of the wavelength corresponding to the first resonant frequency.
  • the antenna further includes a second capacitor structure, the first end of the second capacitor structure is electrically connected to the first end and the second end The first radiator is electrically connected to the ground end of the printed circuit board.
  • the first capacitor structure comprises: an “E” type component and a “U” type component;
  • the "E" shaped component includes a first branch, a second branch, a third branch, and a fourth branch, wherein the first branch and the third branch are connected at both ends of the fourth branch, the a second branch is located between the first branch and the third branch, the second branch is connected to the fourth branch, and a gap is formed between the first branch and the second branch, a gap is formed between the two branches and the third branch;
  • the "U” shaped component includes two branches, two branches of the “U” shaped component being respectively located in two gaps of the "E” shaped component, and the "E” shaped component and the "" U” type parts do not touch each other.
  • the first end of the first radiator is electrically connected to the first branch or the third branch of the first capacitor structure Pick up.
  • the second capacitor structure comprises: an “E” type component and a “U” type component;
  • the "E" shaped component includes a first branch, a second branch, a third branch, and a fourth branch, wherein the first branch and the third branch are connected at both ends of the fourth branch, the a second branch is located between the first branch and the third branch, the second branch is connected to the fourth branch, and a gap is formed between the first branch and the second branch, a gap is formed between the two branches and the third branch;
  • the "U” shaped component includes two branches, two branches of the “U” shaped component being respectively located in two gaps of the "E” shaped component, and the "E” shaped component and the "" U” type parts do not touch each other.
  • the antenna further includes: at least one second radiator, one end of the second radiator and the first The first end of the radiator is electrically connected.
  • the antenna further includes: a second radiator in an “L” shape, and the second radiator in an “L” shape One end is electrically connected to the first end of the first radiator.
  • the antenna further includes: a second radiator in a “ ⁇ ” shape, and the second radiator in a “ ⁇ ” shape One end is electrically connected to the first end of the first radiator.
  • the antenna further includes: two second radiators of a “ ⁇ ” type, and the two are “ ⁇ ” type The openings of the two radiators are opposite to each other, wherein the first ends of the second radiators are electrically connected to the first ends of the first radiators, and the second ends of the second radiators are opposite and not in contact with each other to form Coupling structure.
  • the antenna further includes: at least one second radiator, one end of the second radiator and the first branch and the One of the branches in the third branch is electrically connected.
  • the antenna includes a second radiator of an "L" shape, and one end of the second radiator of the "L" shape versus The first branch is electrically connected.
  • the antenna includes: a second radiator in a “ ⁇ ” shape, and the second radiator in a “ ⁇ ” shape The first end is electrically connected to one of the first branch and the third branch.
  • the antenna further includes: two second radiators of a " ⁇ " type, the two being " ⁇ " type
  • the openings of the second radiator are opposite, one of the second radiators is electrically connected to the first branch, and the other second radiator is electrically connected to the third branch, and the second of the second radiators The ends are opposite and not in contact to form a coupling structure.
  • the first radiator is located on an antenna bracket, and the first radiator is located on the antenna bracket.
  • the distance between the plane in which the first radiator is located and the plane in which the printed circuit board is located is between 2 mm and 6 mm.
  • an embodiment of the present invention provides a mobile terminal, including a radio frequency processing unit, a baseband processing unit, and an antenna;
  • the antenna includes: a first radiator and a first capacitor structure; a first end of the first radiator is electrically connected to a signal feeding end of the printed circuit board by the first capacitor structure, the first radiator The second end is electrically connected to the ground end of the printed circuit board, and the first radiator, the first capacitor structure, the signal feeding end and the ground end form a first antenna, and is used for generating the first a resonant frequency, the electrical length of the first radiator is less than or equal to one eighth of a wavelength corresponding to the first resonant frequency;
  • the RF processing unit is electrically connected to a signal feeding end of the printed circuit board through a matching circuit;
  • the antenna is configured to transmit the received wireless signal to the radio frequency processing unit, or convert the transmission signal of the radio frequency processing unit into an electromagnetic wave, and send the signal; the radio frequency processing unit is configured to receive the antenna
  • the wireless signal is subjected to frequency selection, amplification, down conversion processing, and converted into an intermediate frequency signal or a baseband signal, and sent to the baseband processing unit, or used to upconvert the baseband signal or the intermediate frequency signal sent by the baseband processing unit. Transmitting, transmitting through the antenna; the baseband processing unit, receiving the received intermediate frequency signal Or the baseband signal is processed.
  • the antenna further includes a second capacitor structure, the first end of the second capacitor structure is electrically connected to the first end and the second end The first radiator is electrically connected to the ground end of the printed circuit board.
  • the first capacitor structure comprises: an “E” type component and a “U” type component;
  • the "E" shaped component includes a first branch, a second branch, a third branch, and a fourth branch, wherein the first branch and the third branch are connected at both ends of the fourth branch, the a second branch is located between the first branch and the third branch, the second branch is connected to the fourth branch, and a gap is formed between the first branch and the second branch, a gap is formed between the two branches and the third branch;
  • the "U” shaped component includes two branches, two branches of the “U” shaped component being respectively located in two gaps of the "E” shaped component, and the "E” shaped component and the "" U” type parts do not touch each other.
  • the first end of the first radiator is electrically connected to the first branch or the third branch of the first capacitor structure.
  • the antenna further includes: at least one second radiator, one end of the second radiator and the first The first end of the radiator is electrically connected.
  • the antenna further includes: at least one second radiator, one end of the second radiator and the first branch and the One of the branches in the third branch is electrically connected.
  • the first radiator is located on an antenna bracket, and the plane of the first radiator The distance from the plane in which the printed circuit board is located is between 2 mm and 6 mm.
  • An antenna and a mobile terminal provided by an embodiment of the present invention, where the antenna includes: a first spoke And a first capacitor structure; the first end of the first radiator is electrically connected to the signal feeding end of the printed circuit board by the first capacitor structure, and the second end of the first radiator is electrically Connecting the ground end of the printed circuit board, the first radiator, the first capacitor structure, the signal feeding end and the ground end form a first antenna for generating a first resonant frequency, and The electrical length of the first radiator is less than or equal to one-eighth of the wavelength corresponding to the first resonant frequency, and the antenna can be designed in a small space.
  • FIG. 1 is a schematic diagram 1 of an antenna according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram 2 of an antenna according to an embodiment of the present invention.
  • FIG. 3 is a schematic plan view of an antenna shown in FIG. 1 and FIG. 2 according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an equivalent circuit of an antenna shown in FIG. 1 and FIG. 2 according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram 3 of an antenna according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram 4 of an antenna according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic plan view showing an antenna shown in FIG. 3 and FIG. 4 according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of an equivalent circuit of the antenna shown in FIG. 3 and FIG. 4 according to an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram 5 of an antenna according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram 6 of an antenna according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram 7 of an antenna according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram 8 of an antenna according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram IX of an antenna according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic diagram of an antenna according to an embodiment of the present invention.
  • FIG. 15 is a schematic diagram 11 of an antenna according to an embodiment of the present disclosure.
  • FIG. 16 is a schematic diagram 12 of an antenna according to an embodiment of the present disclosure.
  • FIG. 17 is a schematic diagram of an antenna according to an embodiment of the present invention.
  • FIG. 18 is a schematic diagram of an antenna according to an embodiment of the present invention.
  • FIG. 19 is a schematic plan view of an antenna shown in FIG. 14 according to an embodiment of the present disclosure.
  • FIG. 20 is a diagram showing a return loss loss of an antenna shown in FIG. 14 according to an embodiment of the present invention.
  • FIG. 21 is a frequency response diagram of an antenna shown in FIG. 14 according to an embodiment of the present disclosure.
  • FIG. 22 is a schematic diagram of a resonant frequency generated by adjusting an antenna shown in FIG. 14 according to an embodiment of the present invention.
  • FIG. 23 is a diagram showing frequency response generated by adjusting an antenna shown in FIG. 14 according to an embodiment of the present invention.
  • FIG. 24 is a mobile terminal according to an embodiment of the present invention.
  • FIG. 25 is a schematic plan view of a mobile terminal according to an embodiment of the present invention.
  • An embodiment of the present invention provides an antenna, including: a first radiator 2 and a first capacitor structure 3;
  • the first end 21 of the first radiator 2 is electrically connected to the signal feeding end 11 of the printed circuit board 1 through the first capacitor structure 3, and the second end 22 of the first radiator 2 is electrically connected
  • the grounding end 12 of the printed circuit board 1, the first radiator 2, the first capacitor structure 3, the signal feeding end 11 and the grounding end 12 form a first antenna P1 for generating the first The resonant frequency f1, and the electrical length of the first radiator 2 is less than or equal to one eighth of the wavelength corresponding to the first resonant frequency f1.
  • An embodiment of the present invention provides an antenna, including: a first radiator and a first capacitor structure; a first end of the first radiator is electrically connected to a signal feed of the printed circuit board through the first capacitor structure The second end of the first radiator is electrically connected to the ground end of the printed circuit board, the first radiator, the first capacitor structure, the signal feeding end and the ground end Forming a first antenna for generating a first resonant frequency, and an electrical length of the first radiating body is less than or equal to one eighth of a wavelength corresponding to the first resonant frequency, so that an antenna can be designed in a small space .
  • different antenna positions may be formed for different positions of the first capacitor structure 3, as shown in FIG. 1, the oblique line portion is the first radiator 2, and the black portion is the first portion.
  • the antennas of Figures 1 and 2 are each used to generate the first resonant frequency f1, differing only in the difference in position of the first capacitive structure 3.
  • FIG. 3 is a plan view of the antenna of FIG. 1 and FIG. 2, and D, E, F, C, and A of the black portion in FIG. a radiator 2, the first capacitor structure 3 is indicated by C1, the white portion is the printed circuit board 1, and the portion connected to A is the ground terminal 12 of the printed circuit board 1, and the portion connected to the D is a portion The signal feed terminal 11 of the printed circuit board 1 is described.
  • the first radiator 2, the first capacitor structure 3, the signal feeding end 11 and the ground end 12 form the first antenna P1, and the equivalent circuit diagram is as shown in FIG. Shows that it conforms to the principle of the Left Hand Transmission Line.
  • the D, E, F, C, and A segments of the first radiator 2 are equivalent to a parallel inductance LL with respect to a signal source
  • the first capacitor structure 3 is equivalent to a series capacitance CL with respect to a signal source.
  • the first resonant frequency f1 may cover a resonant frequency of a low frequency band such as LTE B13, LTE B17, or LTE B20.
  • the antenna further includes: a second capacitor structure 4, the first end 41 of the second capacitor structure 4 and the first end of the first radiator 2 21 is electrically connected to any position other than the second end 22, and the second end 42 of the second capacitor structure 4 is electrically connected to the ground end 12 of the printed circuit board 1.
  • the oblique line portion is the first radiator 2, and the black portion is the first capacitor structure 3 and the second capacitor structure 4; as shown in FIG. 6, the oblique line portion is the A radiator 2, the black portion being the first capacitor structure 3 and the second capacitor structure 4.
  • FIG. 7 is a schematic plan view of the antenna of FIG. 5 and FIG. 6, wherein the first radiator 2 is represented by D, E, F, C, and A in FIG.
  • the first capacitor structure 3, the second capacitor structure 4 is indicated by C2, and the white portion represents the printed circuit board 1.
  • the first radiator 2 the first capacitor structure 3, the second capacitor structure 4, the signal feeding end 11 and the grounding
  • the equivalent circuit diagram of the terminal 12 is as shown in FIG. 8 and forms a Composite Right Hand and Left Hand Transmission Line (CRLH TL) structure.
  • CTLH TL Composite Right Hand and Left Hand Transmission Line
  • the first capacitor structure 3 is equivalent to a series capacitance CL with respect to a signal source
  • the second capacitor structure 4 is equivalent to a parallel capacitance CR with respect to a signal source
  • F of the first radiator 2 The C segment is equivalent to a series inductance LR with respect to the signal source
  • the first radiator 2 is C
  • the A segment is equivalent to a parallel inductance LL with respect to the signal source
  • the first capacitor structure 3 the first The radiator 2, the signal feeding end 11 and the grounding end 12 form a left-hand transmission line junction
  • the first resonant frequency f1 can cover the resonant frequency of the low frequency band such as LTE B13, LTE B17, LTE B20, and the F and C segments of the first radiator 2
  • the second capacitor structure 4, the signal feeding end 11 and the ground terminal 12 form a right-hand transmission line structure for generating a second resonance frequency f2, and the second resonance frequency f2 can cover LTE B21 (1447.9 MHz- 1510.9MHz).
  • the first capacitor structure 3 may be a general capacitor, and the first capacitor structure 3 may include at least one capacitor in series or in parallel in multiple forms (which may be referred to as an electrical volume layer component);
  • the capacitor structure 3 may also include: an "E" type component and a "U" type component;
  • the "E"-shaped component includes a first branch, a second branch, a third branch, and a fourth branch, wherein the first branch and the third branch are connected at both ends of the fourth branch, a second branch is located between the first branch and the third branch, the second branch is connected to the fourth branch, and a gap is formed between the first branch and the second branch. a gap is formed between the second branch and the third branch;
  • the "U” shaped component includes two branches, two branches of the “U” shaped component being respectively located in two gaps of the "E” shaped component, and the "E” shaped component and the "" U” type parts do not touch each other.
  • the first capacitor structure 3 includes the "E” The type member and the "U"-shaped member, wherein the portion indicated by a dot is the "E"-shaped member, and the portion indicated by a double oblique line is the "U"-shaped member.
  • the "E" shaped component comprises a first branch 31, a second branch 32, a third branch 33 and a fourth branch 34, wherein the first branch 31 and the third branch 33 are connected to the fourth At both ends of the branch 34, the second branch 32 is located between the first branch 31 and the third branch 33, and the second branch 32 is connected to the fourth branch 34, the first branch 31 A gap is formed between the second branch 32 and the second branch 32; a gap is formed between the second branch 32 and the third branch 33;
  • the "U” shaped component includes two branches, one branch 35 and the other branch 36; one branch 36 of the “U” shaped component is located at the first branch 31 and the second branch of the "E” shaped component In the gap formed by 32, the other branch 36 of the "U” shaped member is located in a gap formed by the second branch 32 of the "E” shaped member and the third branch 33, and the "E” shaped member There is no contact with the "U” type components.
  • the first capacitor structure 3 includes the “E”-shaped component and the “U”-shaped component
  • the first end 21 of the first radiator 2 and the first capacitor structure 3 The first branch 31 or the third branch 33 is electrically connected.
  • the first end 21 of the first radiator 2 is electrically connected to the third branch 33 of the first capacitor structure 3 .
  • the second capacitor structure 4 may be a general capacitor, and the second capacitor structure 4 may include at least one capacitor in series or in parallel in various forms (which may be referred to as an electrical volume layer component);
  • the capacitor structure 4 may also include: an "E" type component and a "U" type component;
  • the "E" shaped component includes a first branch, a second branch, a third branch, and a fourth branch, wherein the first branch and the third branch are connected at both ends of the fourth branch, the a second branch is located between the first branch and the third branch, the second branch is connected to the fourth branch, and a gap is formed between the first branch and the second branch, a gap is formed between the two branches and the third branch;
  • the "U” shaped component includes two branches, two branches of the “U” shaped component being respectively located in two gaps of the "E” shaped component, and the "E” shaped component and the "" U” type parts do not touch each other.
  • a portion indicated by oblique lines is the first radiator 2, and the first capacitor structure 3 and the second capacitor structure 4 each include the "E" type member and the "U"
  • the "shaped member” is a part shown by a point as the "E” type member, and the portion indicated by a double oblique line is the "U” type member.
  • the "E" shaped component comprises a first branch 41, a second branch 42, a third branch 43 and a fourth branch 44, wherein the first branch 41 and the third branch 43 are connected The two ends of the fourth branch 44 are located between the first branch 41 and the third branch 43, and the second branch 42 is connected to the fourth branch 44.
  • a gap is formed between a branch 41 and the second branch 42 , and a gap is formed between the second branch 42 and the third branch 43 ;
  • the "U” shaped component includes two branches, one branch 45 and another branch 46; the "U” shaped component one branch 45 is located at the first branch 41 and the second branch of the "E” shaped component In the gap formed by 42, the other branch 46 of the "U” shaped member is located in a gap formed by the second branch 42 of the “E” shaped member and the third branch 43, and the "E” shaped member There is no contact with the "U” type components.
  • the "M” type component also belongs to the "E” type component, that is, any includes the first branch, the second branch, the third branch, and the fourth branch, and the first branch and The third branch is connected at two ends of the fourth branch, the second branch is located between the first branch and the third branch, and the second branch is connected to the fourth branch, A gap is formed between the first branch and the second branch, and a structure in which a gap is formed between the second branch and the third branch belongs to a range to be protected by an embodiment of the present invention; a "V" type component Also belonging to the "U”-shaped component, that is to say any component having two branches, and the two branches respectively located in the two gaps of the "E”-shaped component belong to the embodiment of the present invention to be protected a range, and the "E"-type component is not in contact with the "U”-type component; for ease of drawing and description, only the drawings of the first capacitive structure 3 and the second capacitive structure 4 are It is shown as “E” type and "U”
  • the first capacitor structure 3 can be a general electric volume layer component, and can also include the "E" type component and the "U” type component, when the antenna further includes other radiators, other The connection of the radiator differs depending on the first capacitive structure 3.
  • the antenna further includes: at least one second radiator 5, the One end of the second radiator 5 is electrically connected to the first end 21 of the first radiator 2 .
  • the antenna further includes: a second radiator 51 of an "L" shape, and one end of the second radiator 51 of the "L" shape and the first radiation
  • the first end 21 of the body 2 is electrically connected.
  • the portion shown by the left oblique line is the first radiator 2
  • the portion indicated by the double oblique line is the second radiator 51
  • the portion indicated by black is the first capacitor structure 3 and the second capacitor.
  • Structure 4 The second radiator 51 of the "L" shape is used to generate a third resonance frequency f3, which covers LTE B7.
  • the antenna may further include: a second radiator 52 in a “ ⁇ ” shape, and one end of the second radiator 52 in the “ ⁇ ” shape and the first The first end 21 of the radiator 2 is electrically connected.
  • the portion indicated by the left oblique line is the first radiator 2
  • the portion indicated by the double oblique line is the second radiator 52
  • the portion indicated by black is the first capacitor structure 3 and the second capacitor.
  • Structure 4 The second radiator 52 of the " ⁇ " type is used to generate a fourth resonance frequency f4, which covers the WCDMA 2100.
  • the antenna further includes: two second radiators of a “ ⁇ ” type, wherein the openings of the two second radiators of the “ ⁇ ” type are opposite, wherein the first of the second radiators is first The end is electrically connected to the first end of the first radiator, and the second ends of the second radiators are opposite and not in contact to form a coupling structure.
  • the two second radiators 5 in the " ⁇ " shape are the second radiator 53 and the second radiator 54, respectively.
  • the first end 53a of the second radiator 53 is electrically connected to the first end 21 of the first radiator 2, and the first end 54a of the second radiator 54 and the first radiator
  • the first end 21 of the second radiator 53 is electrically connected, and the second end 53b of the second radiator 53 is opposite to and not in contact with the second end 54b of the second radiator 54 to form a coupling structure.
  • the second radiator 52 is used to generate a fourth resonance frequency f4, the fourth resonance frequency f4 covers the WCDMA 2100, and the fifth resonance frequency f5 generated by the second radiator 54 is the fifth resonance frequency.
  • F5 covers GSM850 (824MHz-894MHz), GSM900 (880MHz-960MHz), since a coupling structure is formed between the second radiator 52 and the second radiator 53, this can generate a sixth resonance frequency f6, which can cover LTE B3.
  • the first capacitive structure 3 includes the "E” shaped component and the "U” shaped component:
  • the antenna further includes: at least one second radiator 5, one end of the second radiator 5 being electrically connected to one of the first branch 31 and the third branch 33.
  • the antenna further includes: a second radiator 51 of an "L" shape, and one end of the second radiator 51 of the "L” shape and the first branch 31 electrical connection.
  • the second radiator 51 of the "L" shape is used to generate a third resonance frequency f3, and the third resonance frequency f3 covers LTE B7.
  • the antenna further includes: a second radiator 52 in a “ ⁇ ” shape, and one end of the second radiator 52 in the “ ⁇ ” shape and the first branch 31 and the third One of the branches 33 is electrically connected. As shown in FIG. 16, one end of the second radiator 52 of the " ⁇ " type is electrically connected to the first branch 31.
  • the fourth resonance frequency f4 covers the WCDMA 2100;
  • the fifth resonance frequency f5 covers the GSM850 (824MHz-894MHz) ), GSM900 (880MHz-960MHz).
  • the antenna further includes: two second radiators of a “ ⁇ ” type, the two openings of the second radiator having a “ ⁇ ” shape are opposite, wherein one of the second radiators is The first branch is electrically connected, and the other second radiator is electrically connected to the third branch, and the second The second ends of the radiators are opposite and non-contacting to form a coupling structure.
  • the two second radiators 5 of the " ⁇ " type are a second radiator 53 and a second radiator 54, respectively, the second radiator 53 and the second radiator 54.
  • the first end 53a of the second radiator 53 is connected to the first branch 31 of the first capacitor structure 3, and the first end 54a of the second radiator 54 is opposite to the first capacitor
  • the third branch 33 of the structure 3 is connected, and the second end 53b of the second radiator 53 is opposite and not in contact with the second end 54b of the second radiator 54 to form a coupling structure.
  • the second radiator 53 is used to generate a fourth resonance frequency f4, the fourth resonance frequency f4 may cover the WCDMA 2100, the fifth resonance frequency generated by the second radiator 54, the fifth resonance frequency F5 may cover GSM850 (824MHz-894MHz), GSM900 (880MHz-960MHz), because the second end 53b of the second radiator 53 is opposite to the second end 54b of the second radiator 54 and is not in contact with each other to form
  • the coupling structure produces a sixth resonant frequency f6 that can cover LTE B3.
  • the first resonant frequency f1 and the fifth resonant frequency f5 may cover a low frequency band of GSM/WCDMA/UMTS/LTE
  • the second resonant frequency f2 may cover LTE B21
  • the third resonance The frequency f3, the fourth resonance frequency f4, and the sixth resonance frequency f6 may cover a high frequency band of the DCS/PCS/WCDMA/UMTS/LTE.
  • the first radiator 2 in the antenna proposed in this embodiment is located on the antenna holder, and the vertical distance between the plane where the first radiator 2 is located and the plane of the printed circuit board 1 may be 2 mm to 6 mm. In between, this leaves a certain clearance area for the antenna design, improves the performance of the antenna, and at the same time realizes designing a multi-resonant and bandwidth antenna in a small space.
  • At least one second radiator 5 can also be located on the antenna bracket.
  • the first capacitive structure 3 and/or the second capacitive structure 4 can also be located on the antenna support.
  • radiators in the antenna when a plurality of radiators are included in the antenna, different radiators in the antenna generate a corresponding resonant frequency. Generally, each radiator will generate a phase. The corresponding resonant frequency is mainly transmitted and received.
  • the embodiment of the present invention establishes a simulated antenna model for the antenna described in the first embodiment, and performs simulation and actual testing.
  • the antenna includes: a first radiator 2, a first capacitor structure 3, a second capacitor structure 4, and a second radiator 51 of an "L" shape, and the two are " ⁇ " type.
  • the first capacitor structure 3 includes the "E” type component and the "U” type component, and the second capacitor structure 4 is a general electrical volume layer component, and the first end 21 of the first radiator 2 is The third branch 33 of the first capacitor structure 3 is connected, one end of the second radiator 51 is connected to the first branch 31 of the first capacitor structure 3, and the first end 53a of the second radiator 53 is The first branch 31 of the first capacitor structure 3 is connected, the first end 54a of the second radiator 54 is connected to the third branch 33 of the first capacitor structure 3, and the second radiator 53 is The second end 53b is opposite and not in contact with the second end 54b of the second radiator 54, forming a coupling structure.
  • FIG. 19 is a plan view showing the antenna of FIG. 18, wherein the first radiator 2 is represented by D, E, F, C, and A in FIG. 19, and the The second radiator 51, the second radiator 53 is represented by F, I, and J, and the "E" type structure and "U” indicated by the second radiator 54, E, F are represented by F, G, and H.
  • the structure is the first capacitor structure 3, the second capacitor structure 4 is represented by Y, A and B are the ground terminals of the printed circuit board, and D is the signal feeding end of the printed circuit board, and the white portion The printed circuit board 1 is shown.
  • FIG. 20 it is a multi-frequency resonance return loss map of the antenna shown in FIG.
  • the coordinate indicates the frequency (Freq), the unit is gigahertz (GHz), and the ordinate indicates the return loss in decibels (dB).
  • the low frequency operating frequency (return loss) of the antenna Below -6dB) the minimum can reach 680MHz (megahertz)
  • the low-frequency working bandwidth is 680MHz to nearly 960MHz
  • the antenna's high-frequency operating frequency (return loss is lower than -6dB) can reach more than 2800MHz
  • high-frequency working bandwidth It is from around 1440MHz to over 2800MHz.
  • the antenna can cover the low frequency band of GSM/WCDMA/UMTS/LTE, and the high frequency band of DCS/PCS/WCDMA/UMTS/LTE, and can also cover the special frequency end LTE B7 (2500MHz-2690MHz) and LTE B21 (1447.9MHz-1510.9MHz) to meet the needs of the working frequency band of most wireless terminal services.
  • FIG. 21 has the same meaning as that shown in FIG. 20, wherein FIG. 21 is a frequency-standing wave ratio diagram of the pseudo antenna model ( Frequency response diagram), where the abscissa represents the frequency and the ordinate is the standing wave ratio.
  • the antenna designed in the embodiment of the present invention can generate low frequency resonance and high frequency resonance, the low frequency frequency can cover 680 MHz-960 MHz, and the high frequency frequency can cover 1440 MHz-2800 MHz; by adjusting the distributed inductance and the series capacitance, The resonant frequency can be controlled in the special frequency band LTE B7 (2500MHz-2690MHz) and LTE B21 (1447.9MHz-1510.9MHz) to cover the frequency bands required by the current 2G/3G/4G communication system.
  • LTE B7 2500MHz-2690MHz
  • LTE B21 1447.9MHz-1510.9MHz
  • the ground end 12 of the printed circuit board 1 is electrically connected between the first end 21 and the second end 22 of the first radiator 2 through the second capacitor structure 4, the first The position of the second capacitive structure 4 between the first end 21 and the second end 22 of the first radiator 2 enables the antenna to generate different resonant frequencies.
  • FIG. 18 by adjusting the first radiator 2, the second radiator 51, The electrical length of the second radiator 53, the second radiator 54, and the position of the second capacitor structure 4 between the first end 21 and the second end 22 of the first radiator 2, A schematic diagram of a plurality of resonant frequencies that can be generated by the antenna (illustrated by f1-f5 in FIG. 22);
  • FIG. 23 is a frequency-standing wave ratio diagram of the antenna shown in FIG. 22, wherein the abscissa represents frequency in units of gigabits.
  • the ordinate represents the standing wave ratio
  • the first resonant frequency f1 generated by the first radiator 2 is used to cover LTE B13, LTE B17, LTE B20, GSM850 (824MHz-894MHz), GSM900 (880MHz-960MHz)
  • the second resonant frequency f2 generated by the FCB segment of the first radiator 2 may cover the LTE B21
  • the third resonant frequency f3 generated by the second radiator 51 may cover the LTE B7
  • the second The fourth resonant frequency f4 generated by the radiator 53 may cover the WCDMA 2100
  • the fifth resonant frequency f5 generated by the second radiator 54 may cover the LTE B3.
  • the first resonant frequency f1 may cover a low frequency band of GSM/WCDMA/UMTS/LTE
  • the second resonant frequency f2 may cover a special frequency end LTE B21
  • the third resonant frequency f3 the third resonant frequency f3
  • the fourth resonant frequency f4 and the fifth resonant frequency f5 may cover a high frequency band of the DCS/PCS/WCDMA/UMTS/LTE.
  • An embodiment of the present invention provides an antenna, including: a first radiator, a first capacitor structure, a second capacitor structure, and three second radiators, wherein the first end of the first radiator passes the first a capacitor structure electrically connected to the signal feeding end of the printed circuit board, the second end of the first radiator is electrically connected to the ground end of the printed circuit board, the first radiator, the first a capacitor structure, the signal feeding end and the ground end form a first antenna for generating a first resonant frequency, and an electrical length of the first radiator is less than or equal to a wavelength corresponding to the first resonant frequency
  • This can reduce the size of the antenna.
  • the antenna not only has a plurality of resonant bandwidths, but also has a small size, and a multi-resonant wideband antenna can be designed in a small space.
  • An embodiment of the present invention provides a mobile terminal.
  • the mobile terminal includes a radio frequency processing unit, a baseband processing unit, and an antenna.
  • the antenna includes: a first radiator 2 and a first capacitor structure 3; the first end 21 of the first radiator 2 is electrically connected to the signal feeding end 11 of the printed circuit board 1 through the first capacitor structure 3 The second end 22 of the first radiator 2 is electrically connected to the ground end 12 of the printed circuit board 1.
  • the first radiator 2, the first capacitor structure 2, and the signal feeding end 11 Forming a first antenna with the grounding end 12 for generating a first resonant frequency f1, and an electrical length of the first radiating body 2 is less than or equal to one eighth of a wavelength corresponding to the first resonant frequency f1;
  • the RF processing unit is electrically connected to the signal feeding end 11 of the printed circuit board 1 through a matching circuit;
  • the antenna is configured to transmit the received wireless signal to the radio frequency processing unit, or convert the transmission signal of the radio frequency processing unit into an electromagnetic wave, and send the signal;
  • the radio frequency processing unit is configured to receive the antenna
  • the wireless signal is subjected to frequency selection, amplification, down conversion processing, and converted into an intermediate frequency signal or a baseband signal, and sent to the baseband processing unit, or used to upconvert the baseband signal or the intermediate frequency signal sent by the baseband processing unit. And transmitting, transmitting through the antenna; and the baseband processing unit processes the received intermediate frequency signal or the baseband signal.
  • the matching circuit is configured to adjust an impedance of the antenna to match an impedance of the RF processing unit to generate a resonant frequency that meets the requirement; the first resonant frequency f1 can cover LTE B13, LTE B17, LTE B20, etc. Low frequency band.
  • the first radiator 2 is located on the antenna bracket, and the vertical distance between the plane where the first radiator 2 is located and the plane where the printed circuit board 1 is located is between 2 mm and 6 mm. This can design a certain clearance area for the antenna and improve the antenna. The performance is achieved while designing the antenna in a small space.
  • Figure 25 is a plan view schematically showing the mobile terminal shown in Figure 24, wherein the first radiator 2 is represented by D, E, F, C, A, and the first capacitor structure 3 is represented by C1, and A represents The ground terminal 12 of the printed circuit board 1 , D represents the signal feeding end 11 of the printed circuit board 1 , and the matching circuit is electrically connected to the signal feeding end 11 of the printed circuit board 1 .
  • the antennas in this embodiment may also include any one of the antennas in the first embodiment and the second embodiment.
  • the mobile terminal may be a communication device used in mobile, and may be a mobile phone or a tablet computer, and the data card is not limited thereto.

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Abstract

一种天线及移动终端，涉及天线技术领域，解决在较小的空间中设计天线。所述天线包括第一辐射体（2）和第一电容结构（3）；所述第一辐射体（2）的第一端（21）通过所述第一电容结构（3）电性连接所述印刷电路板（1）的信号馈电端（11），所述第一辐射体（2）的第二端（22）电性连接所述印刷电路板（1）的接地端（12），所述第一辐射体（2）、所述第一电容结构（3）、所述信号馈电端（11）与所述接地端（12）形成第一天线，用于产生第一谐振频率，并且所述第一辐射体（2）的电长度为小于或等于所述第一谐振频率对应波长的八分之一。

Description

一种天线及移动终端
本申请要求于2014年2月12日提交中国专利局，申请号为201410049276.9、发明名称为“一种天线及移动终端”的中国专利申请，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及天线技术领域，尤其涉及一种天线及移动终端。
背景技术
众所周知，现阶段商业常用的频段包括全球移动通讯系统(Global System of Mobile communication，简称GSM)，GSM850(824MHz～894MHz)，GSM900(880MHz～960MHz)，全球定位系统(Global Positioning System，简称GPS)(1575MHz)，数字视频广播(Digital Video Broadcasting，简称DVB)-H(1670MHz～1675MHz)，数据通信子系统(Data Communication Subsystem，简称DCS)(1710MHz～1880MHz)，个人通讯服务(Personal Communications Service，简称PCS)，通用移动通信系统(Universal Mobile Telecommunications System，简称UMTS)或第三代移动通信技术(3rd-generation，简称3G)(1920MHz～2175MHz)，蓝牙或无线局域网络(Wireless Local Area Networks，简称WLAN)802.11b/g(2400MHz～2484MHz)等共计八个频段；另外，长期演进(Long Term Evolution，简称LTE)项目为目前热门的一个工作频段，其工作频段为698MHz～960MHz，以及1710MHz～2700MHz。
其中，天线是无线电设备用于进行接收和发射电磁波信号的装置，而伴随着第四代移动通讯的来临，对于终端产品的带宽要求也越来越高。由于天线实现信号传播和能量辐射均基于频率的谐振，而且天线的电长 度为天线谐振频率对应波长的四分之一，而现在终端产品日趋轻薄，如何在越来越小的空间设计天线成为急需解决的问题。
发明内容
本发明的实施例提供一种天线及移动终端，可以在较小的空间设计天线。
本发明的实施例采用如下技术方案：
第一方面，本发明实施例提供了一种天线，包括：第一辐射体和第一电容结构；
所述第一辐射体的第一端通过所述第一电容结构电性连接印刷电路板的信号馈电端，所述第一辐射体的第二端电性连接所述印刷电路板的接地端，所述第一辐射体、所述第一电容结构、所述信号馈电端与所述接地端形成第一天线，用于产生第一谐振频率，并且所述第一辐射体的电长度为小于或等于所述第一谐振频率对应波长的八分之一。
结合第一方面，在第一种可能的实现方式中，所述天线还包括第二电容结构，所述第二电容结构的第一端电性连接所述第一端与所述第二端之间的所述第一辐射体，所述第二电容结构的第二端与所述印刷电路板的接地端电性连接。
结合第一方面或第一方面的第一种可能，在第二种可能的实现方式中，所述第一电容结构包括：“E”型部件和“U”型部件；
所述“E”型部件包括第一分支、第二分支、第三分支和第四分支，其中所述第一分支和所述第三分支连接在所述第四分支的两端，所述第二分支位于所述第一分支与所述第三分支之间，所述第二分支与所述第四分支连接，所述第一分支与所述第二分支之间形成有间隙，所述第二分支与所述第三分支之间形成有间隙；
所述“U”型部件包括两个分支，所述“U”型部件的两个分支分别位于所述“E”型部件的两个间隙中，且所述“E”型部件和所述“U”型部件之间互不接触。
结合第一方面的第二种可能，在第三种可能的实现方式中，所述第一辐射体的第一端与所述第一电容结构的第一分支或第三分支电性连 接。
结合第一方面的第一种可能，在第四种可能的实现方式中，所述第二电容结构包括：“E”型部件和“U”型部件；
所述“E”型部件包括第一分支、第二分支、第三分支和第四分支，其中所述第一分支和所述第三分支连接在所述第四分支的两端，所述第二分支位于所述第一分支与所述第三分支之间，所述第二分支与所述第四分支连接，所述第一分支与所述第二分支之间形成有间隙，所述第二分支与所述第三分支之间形成有间隙；
所述“U”型部件包括两个分支，所述“U”型部件的两个分支分别位于所述“E”型部件的两个间隙中，且所述“E”型部件和所述“U”型部件之间互不接触。
结合第一方面或第一方面的第一种可能，在第五种可能的实现方式中，所述天线还包括：至少一个第二辐射体，所述第二辐射体的一端与所述第一辐射体的第一端电性连接。
结合第一方面的第五种可能，在第六种可能的实现方式中，所述天线还包括：一个呈“L”型的第二辐射体，所述呈“L”型的第二辐射体的一端与所述第一辐射体的第一端电性连接。
结合第一方面的第五种可能，在第七种可能的实现方式中，所述天线还包括：一个呈“匚”型的第二辐射体，所述呈“匚”型的第二辐射体的一端与所述第一辐射体的第一端电性连接。
结合第一方面的第五种可能，在第八种可能的实现方式中，所述天线还包括：两个呈“匚”型的第二辐射体，所述两个呈“匚”型的第二辐射体的开口相对，其中各第二辐射体的第一端与所述第一辐射体的第一端电性连接，所述各第二辐射体的第二端相对且不接触，以形成耦合结构。
结合第一方面的第二种可能，在第九种可能的实现方式中，所述天线还包括：至少一个第二辐射体，所述第二辐射体的一端与所述第一分支和所述第三分支中的其中一个分支电性连接。
结合第一方面的第九种可能，在第十种可能的实现方式中，所述天线包括一个呈“L”型的第二辐射体，所述呈“L”型的第二辐射体的一端与 所述第一分支电性连接。
结合第一方面的第九种可能，在第十一种可能的实现方式中，所述天线包括：一个呈“匚”型的第二辐射体，所述呈“匚”型的第二辐射体的第一端与所述第一分支和所述第三分支中的其中一个分支电性连接。
结合第一方面的第九种可能，在第十二种可能的实现方式中，所述天线还包括：两个呈“匚”型的第二辐射体，所述两个呈“匚”型的第二辐射体的开口相对，其中一个第二辐射体与所述第一分支电性连接，另一个第二辐射体与所述第三分支电性连接，所述各第二辐射体的第二端相对且不接触，以形成耦合结构。
结合第一方面至第一方面的前十二种任一可能，在第十三种可能的实现方式中，所述第一辐射体位于天线支架上，所述第一辐射体位于天线支架上，所述第一辐射体所在的平面与所述印刷电路板所在的平面之间的距离在2毫米-6毫米之间。
第二方面，本发明实施例提供了一种移动终端，包括射频处理单元、基带处理单元和天线；其中，
所述天线包括：第一辐射体和第一电容结构；所述第一辐射体的第一端通过所述第一电容结构电性连接印刷电路板的信号馈电端，所述第一辐射体的第二端电性连接所述印刷电路板的接地端，所述第一辐射体、所述第一电容结构、所述信号馈电端与所述接地端形成第一天线，用于产生第一谐振频率，所述第一辐射体的电长度为小于或等于所述第一谐振频率对应波长的八分之一；
所述射频处理单元通过匹配电路与所述印刷电路板的信号馈电端电性连接；
所述天线，用于将接收到的无线信号传输给所述射频处理单元，或者将射频处理单元的发射信号转换为电磁波，发送出去；所述射频处理单元，用于对所述天线接收到的无线信号进行选频、放大、下变频处理，并将其转换成中频信号或基带信号发送给所述基带处理单元，或者，用于将所述基带处理单元发送的基带信号或中频信号经过上变频、放大，通过所述天线发送出去；所述基带处理单元，对接收到的所述中频信号 或所述基带信号进行处理。
结合第二方面，在第一种可能的实现方式中，所述天线还包括第二电容结构，所述第二电容结构的第一端电性连接所述第一端与所述第二端之间的所述第一辐射体，所述第二电容结构的第二端与所述印刷电路板的接地端电性连接。
结合第二方面或第一方面的第一种可能，在第二种可能的实现方式中，所述第一电容结构包括：“E”型部件和“U”型部件；
所述“E”型部件包括第一分支、第二分支、第三分支和第四分支，其中所述第一分支和所述第三分支连接在所述第四分支的两端，所述第二分支位于所述第一分支与所述第三分支之间，所述第二分支与所述第四分支连接，所述第一分支与所述第二分支之间形成有间隙，所述第二分支与所述第三分支之间形成有间隙；
所述“U”型部件包括两个分支，所述“U”型部件的两个分支分别位于所述“E”型部件的两个间隙中，且所述“E”型部件和所述“U”型部件之间互不接触。
结合第二方面的第二种可能，在第三种可能的实现方式中，所述第一辐射体的第一端与所述第一电容结构的第一分支或第三分支电性连接。
结合第二方面或第二方面的第一种可能，在第四种可能的实现方式中，所述天线还包括：至少一个第二辐射体，所述第二辐射体的一端与所述第一辐射体的第一端电性连接。
结合第二方面的第二种可能，在第五种可能的实现方式中，所述天线还包括：至少一个第二辐射体，所述第二辐射体的一端与所述第一分支和所述第三分支中的其中一个分支电性连接。
结合第二方面至第二方面的第五种可能中的任一种可能，在第六种可能的实现方式中，所述第一辐射体位于天线支架上，所述第一辐射体所在的平面与所述印刷电路板所在的平面之间的距离在2毫米-6毫米之间。
本发明实施例提供的一种天线及移动终端，所述天线包括：第一辐 射体和第一电容结构；所述第一辐射体的第一端通过所述第一电容结构电性连接所述印刷电路板的信号馈电端，所述第一辐射体的第二端电性连接所述印刷电路板的接地端，所述第一辐射体、所述第一电容结构、所述信号馈电端与所述接地端形成第一天线，用于产生第一谐振频率，并且所述第一辐射体的电长度为小于或等于所述第一谐振频率对应波长的八分之一，可以在较小的空间中设计天线。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种天线示意图一；
图2为本发明实施例提供的一种天线示意图二；
图3为本发明实施例提供的示意图一与示意图二所示天线的平面示意图；
图4为本发明实施例提供的示意图一与示意图二所示的天线的等效电路示意图；
图5为本发明实施例提供的一种天线的示意图三；
图6为本发明实施例提供的一种天线的示意图四；
图7为本发明实施例提供示意图三和示意图四所示天线的平面示意图；
图8为本发明实施例提供的示意图三和示意图四所示天线的等效电路示意图；
图9为本发明实施例提供的一种天线的示意图五；
图10为本发明实施例提供的一种天线的示意图六；
图11为本发明实施例提供的一种天线的示意图七；
图12为本发明实施例提供的一种天线的示意图八；
图13为本发明实施例提供的一种天线的示意图九；
图14为本发明实施例提供的一种天线的示意图十；
图15为本发明实施例提供的一种天线的示意图十一；
图16为本发明实施例提供的一种天线的示意图十二；
图17为本发明实施例提供的一种天线的示意图十三；
图18为本发明实施例提供的一种天线的示意图十四；
图19为本发明实施例提供的示意图十四所示天线的平面示意图；
图20为本发明实施例提供的示意图十四所示天线的回损损耗图；
图21为本发明实施例提供的示意图十四所示天线的频率响应图；
图22为本发明实施例提供的示意图十四所示天线进行调整后的产生的谐振频率示意图；
图23为本发明实施例提供的示意图十四所示天线进行调整后的产生的频率响应图；
图24为本发明实施例提供的一种移动终端；
图25为本发明实施例提供的一种移动终端的平面示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例一
本发明实施例提供了一种天线，包括：第一辐射体2和第一电容结构3；
所述第一辐射体2的第一端21通过所述第一电容结构3电性连接印刷电路板1的信号馈电端11，所述第一辐射体2的第二端22电性连接所述印刷电路板1的接地端12，所述第一辐射体2、所述第一电容结构3、所述信号馈电端11与所述接地端12形成第一天线P1，用于产生第一谐振频率f1，并且所述第一辐射体2的电长度小于或等于所述第一谐振频率f1对应波长的八分之一。
本发明实施例提供了一种天线，包括：第一辐射体和第一电容结构；所述第一辐射体的第一端通过所述第一电容结构电性连接所述印刷电路板的信号馈电端，所述第一辐射体的第二端电性连接所述印刷电路板的接地端，所述第一辐射体、所述第一电容结构、所述信号馈电端与所述接地端形成第一天线，用于产生第一谐振频率，并且所述第一辐射体的电长度为小于或等于所述第一谐振频率对应波长的八分之一，这样可以在较小的空间设计天线。
在实际的设计中，对所述第一电容结构3设计位置的不同，可形成不同的天线示意图，如图1所示，斜线部分为所述第一辐射体2，黑色部分为所述第一电容结构3；如图2所示，斜线部分为所述第一辐射体2，黑色部分为所述第一电容结构3。图1和图2所述的天线均用于产生所述第一谐振频率f1，区别仅在于所述第一电容结构3位置的不同。
为了方便理解所述天线如何产生的第一谐振频率f1，图3为对图1和图2所述天线的平面示意图，图3中黑色部分的D、E、F、C、A表示所述第一辐射体2，以C1表示所述第一电容结构3，白色部分表示所述印刷电路板1，与A连接的部分为所述印刷电路板1的接地端12，与D连接的部分为所述印刷电路板1的信号馈电端11。
具体的，所述第一辐射体2、所述第一电容结构3、所述信号馈电端11与所述接地端12形成所述第一天线P1，其等效电路图如图4所 示，符合左手传输线(Left Hand Transmission Line)原理。其中，所述第一辐射体2的D、E、F、C、A段等效为相对于信号源的并联电感LL，所述第一电容结构3等效为相对于信号源的串联电容CL，用于产生所述第一谐振频率f1，所述第一谐振频率f1可以覆盖LTE B13、LTE B17、LTE B20等低频频段的谐振频率。
进一步的，如图5和图6所示，所述天线还包括：第二电容结构4，所述第二电容结构4的第一端41与所述第一辐射体2中的除第一端21和第二端22之外的任一位置电性连接，所述第二电容结构4的第二端42与所述印刷电路板1的接地端12电性连接。
如图5所示，斜线部分为所述第一辐射体2，黑色部分为所述第一电容结构3和所述第二电容结构4；如图6所示，斜线部分为所述第一辐射体2，黑色部分为所述第一电容结构3和所述第二电容结构4。
为了方便理解所述天线，图7为对图5和图6所述天线的平面示意图，图7中以D、E、F、C、A表示所述第一辐射体2，以C1表示所述第一电容结构3，以C2表示所述第二电容结构4，白色部分表示所述印刷电路板1。
具体的，对于图5和图6所示的天线，由所述第一辐射体2、所述第一电容结构3、所述第二电容结构4、所述信号馈电端11与所述接地端12的等效电路图如图8所示，形成复合左右手传输线(Composite Right Hand and Left Hand Transmission Line，简称CRLH TL)结构。其中，所述第一电容结构3等效为相对于信号源的串联电容CL，所述第二电容结构4等效为相对于信号源的并联电容CR，所述第一辐射体2的F、C段等效为相对于信号源的串联电感LR，所述第一辐射体2是C、A段等效为相对于信号源的并联电感LL，所述第一电容结构3、所述第一辐射体2、所述信号馈电端11和所述接地端12形成左手传输线结 构，用以产生所述第一谐振频率f1，所述第一谐振频率f1可以覆盖LTE B13、LTE B17、LTE B20等低频频段的谐振频率，所述第一辐射体2的F、C段、所述第二电容结构4、所述信号馈电端11与所述接地端12形成右手传输线结构，用以产生第二谐振频率f2，所述第二谐振频率f2可以覆盖LTE B21(1447.9MHz-1510.9MHz)。
可选的，所述第一电容结构3可以为一般的电容，所述第一电容结构3可以包括至少一个多种形式串联或并联的电容(可称为电容积层组件)；所述第一电容结构3也可以包括：“E”型部件和“U”型部件；
其中，所述“E”型部件包括第一分支、第二分支、第三分支和第四分支，其中所述第一分支和所述第三分支连接在所述第四分支的两端，所述第二分支位于所述第一分支与所述第三分支之间，所述第二分支与所述第四分支连接，所述第一分支与所述第二分支之间形成有间隙，所述第二分支与所述第三分支之间形成有间隙；
所述“U”型部件包括两个分支，所述“U”型部件的两个分支分别位于所述“E”型部件的两个间隙中，且所述“E”型部件和所述“U”型部件之间互不接触。
如图9所示，以斜线所示的部分为所述第一辐射体2，以黑色所述的部分为所述第二电容结构4，所述第一电容结构3包括所述“E”型部件和所述“U”型部件，其中，以点所示部分为所述“E”型部件，以双斜线所示部分为所述“U”型部件。其中，所述“E”型部件包括第一分支31、第二分支32、第三分支33和第四分支34，其中所述第一分支31和所述第三分支33连接在所述第四分支34的两端，所述第二分支32位于所述第一分支31与所述第三分支33之间，所述第二分支32与所述第四分支34连接，所述第一分支31与所述第二分支32之间形成有间隙，所述第二分支32与所述第三分支33之间形成有间隙；
所述“U”型部件包括两个分支，一个分支35和另一个分支36；所述“U”型部件一个分支36位于所述“E”型部件的第一分支31与所述第二分支32形成的间隙中，所述“U”型部件另一个分支36位于所述“E”型部件的第二分支32与所述第三分支33形成的间隙中，且所述“E”型部件和所述“U”型部件之间互不接触。
可选的，当所述第一电容结构3包括所述“E”型部件和所述“U”型部件时，所述第一辐射体2的第一端21与所述第一电容结构3的第一分支31或第三分支33电性连接。如图9所示，为所述第一辐射体2的第一端21与所述第一电容结构3的第三分支33电性连接。
可选的，所述第二电容结构4可以为一般的电容，所述第二电容结构4可以包括至少一个多种形式串联或并联的电容(可称为电容积层组件)；所述第二电容结构4也可以包括：“E”型部件和“U”型部件；
所述“E”型部件包括第一分支、第二分支、第三分支和第四分支，其中所述第一分支和所述第三分支连接在所述第四分支的两端，所述第二分支位于所述第一分支与所述第三分支之间，所述第二分支与所述第四分支连接，所述第一分支与所述第二分支之间形成有间隙，所述第二分支与所述第三分支之间形成有间隙；
所述“U”型部件包括两个分支，所述“U”型部件的两个分支分别位于所述“E”型部件的两个间隙中，且所述“E”型部件和所述“U”型部件之间互不接触。
如图10所示，以斜线所示部分为所述第一辐射体2，所述第一电容结构3和所述第二电容结构4均包括所述“E”型部件和所述“U”型部件，以点所示部分为所述“E”型部件，以双斜线所示部分为所述“U”型部件。其中，所述“E”型部件包括第一分支41、第二分支42、第三分支43和第四分支44，其中所述第一分支41和所述第三分支43连接在所 述第四分支44的两端，所述第二分支42位于所述第一分支41与所述第三分支43之间，所述第二分支42与所述第四分支44连接，所述第一分支41与所述第二分支42之间形成有间隙，所述第二分支42与所述第三分支43之间形成有间隙；
所述“U”型部件包括两个分支，一个分支45和另一个分支46；所述“U”型部件一个分支45位于所述“E”型部件的第一分支41与所述第二分支42形成的间隙中，所述“U”型部件另一个分支46位于所述“E”型部件的第二分支42与所述第三分支43形成的间隙中，且所述“E”型部件和所述“U”型部件之间互不接触。
值得注意的是，“M”型部件也属于所述“E”型部件，也就是说任何包括所述第一分支、第二分支、第三分支和第四分支，且所述第一分支和所述第三分支连接在所述第四分支的两端，所述第二分支位于所述第一分支与所述第三分支之间，所述第二分支与所述第四分支连接，所述第一分支与所述第二分支之间形成有间隙，所述第二分支与所述第三分支之间形成有间隙的结构均属于本发明实施例所要保护的范围；“V”型部件也属于所述“U”型部件，也就是说任何具有两个分支，且所述两个分支分别位于所述“E”型部件的两个间隙中的部件均属于本发明实施例所要保护的范围，且所述“E”型部件与所述“U”型部件之间不接触；为了绘制和描述方便，对所述第一电容结构3和所述第二电容结构4的附图中仅以“E”型和“U”型所示。
由于所述第一电容结构3既可以为一般的电容积层组件，也可以包括所述“E”型部件和所述“U”型部件，所以当所述天线还包括其他辐射体时，其他辐射体的连接因所述第一电容结构3的不同而不同。
当所述第一电容结构3为一般的电容积层组件时：
如图11所示，所述天线还包括：至少一个第二辐射体5，所述第 二辐射体5的一端与所述第一辐射体2的第一端21电性连接。
可选的，如图12所示，所述天线还包括：一个呈“L”型的第二辐射体51，所述呈“L”型的第二辐射体51的一端与所述第一辐射体2的第一端21电性连接。其中，左斜线所示部分为所述第一辐射体2，双斜线所示部分为所述第二辐射体51，黑色所示部分为所述第一电容结构3和所述第二电容结构4。所述呈“L”型的第二辐射体51用于产生第三谐振频率f3，所述第三谐振频率f3覆盖LTE B7。
可选的，如图13所示，所述天线还可以包括：一个呈“匚”型的第二辐射体52，所述呈“匚”型的第二辐射体52的一端与所述第一辐射体2的第一端21电性连接。其中，左斜线所示部分为所述第一辐射体2，双斜线所示部分为所述第二辐射体52，黑色所示部分为所述第一电容结构3和所述第二电容结构4。所述呈“匚”型的第二辐射体52用于产生第四谐振频率f4，所述第四谐振频率f4覆盖WCDMA 2100。
可选的，所述天线还包括：两个呈“匚”型的第二辐射体，所述两个呈“匚”型的第二辐射体的开口相对，其中各第二辐射体的第一端与所述第一辐射体的第一端电性连接，所述各第二辐射体的第二端相对且不接触，以形成耦合结构。
如图14所示，所述两个呈“匚”型的第二辐射体5分别为第二辐射体53和第二辐射体54。其中，所述第二辐射体53的第一端53a与所述第一辐射体2的第一端21电性连接，所述第二辐射体54的第一端54a与所述第一辐射体2的第一端21电性连接，所述第二辐射体53的第二端53b与所述第二辐射体54的第二端54b相对且不接触，以形成耦合结构。其中，所述第二辐射体52用于产生第四谐振频率f4，所述第四谐振频率f4覆盖WCDMA 2100，所述第二辐射体54产生的第五谐振频率f5，所述第五谐振频率f5覆盖GSM850(824MHz-894MHz)、 GSM900(880MHz-960MHz)，由于所述第二辐射体52与所述第二辐射体53之间形成耦合结构，这样可以产生第六谐振频率f6，所述第六谐振频率f6可以覆盖LTE B3。
当所述第一电容结构3包括所述“E”型部件和所述“U”型部件时：
可选的，所述天线还包括：至少一个第二辐射体5，所述第二辐射体5的一端与所述第一分支31和所述第三分支33中的其中一个分支电性连接。
可选的，如图15所示，所述天线还包括：一个呈“L”型的第二辐射体51，所述呈“L”型的第二辐射体51的一端与所述第一分支31电性连接。
其中，所述呈“L”型的第二辐射体51用于产生第三谐振频率f3，所述第三谐振频率f3覆盖LTE B7。
可选的，所述天线还包括：一个呈“匚”型的第二辐射体52，所述呈“匚”型的第二辐射体52的一端与所述第一分支31和所述第三分支33中的其中一个分支电性连接。如图16所示，所述呈“匚”型的第二辐射体52的一端与所述第一分支31电性连接。
其中，当所述呈“匚”型的第二辐射体52的一端与所述第一分支31电性连接时，用于产生第四谐振频率f4，所述第四谐振频率f4覆盖WCDMA 2100；当所述呈“匚”型的第二辐射体52的一端与所述第三分支33电性连接时，用于产生第五谐振频率f5，所述第五谐振频率f5覆盖GSM850(824MHz-894MHz)、GSM900(880MHz-960MHz)。
可选的，所述天线还包括：两个呈“匚”型的第二辐射体，所述两个呈“匚”型的第二辐射体的开口相对，其中一个第二辐射体与所述第一分支电性连接，另一个第二辐射体与所述第三分支电性连接，所述各第二 辐射体的第二端相对且不接触，以形成耦合结构。
如图17所示，所述两个呈“匚”型的第二辐射体5分别为第二辐射体53和第二辐射体54，所述第二辐射体53与所述第二辐射体54的的开口相对，所述第二辐射体53的第一端53a与所述第一电容结构3的第一分支31连接，所述第二辐射体54的第一端54a与所述第一电容结构3的第三分支33连接，所述第二辐射体53的第二端53b与所述第二辐射体54的第二端54b相对且不接触，以形成耦合结构。其中，所述第二辐射体53用于产生第四谐振频率f4，所述第四谐振频率f4可以覆盖WCDMA 2100，所述第二辐射体54产生的第五谐振频率，所述第五谐振频率f5可以覆盖GSM850(824MHz-894MHz)、GSM900(880MHz-960MHz)，由于所述第二辐射体53的第二端53b与所述第二辐射体54的第二端54b相对且不接触，以形成耦合结构，产生第六谐振频率f6可以覆盖LTE B3。
综上所述，所述第一谐振频率f1以及所述第五谐振频率f5可以覆盖GSM/WCDMA/UMTS/LTE的低频频段，所述第二谐振频率f2可以覆盖LTE B21，所述第三谐振频率f3、所述第四谐振频率f4以及所述第六谐振频率f6可以覆盖DCS/PCS/WCDMA/UMTS/LTE的高频频段。
本实施例所提出的天线中的第一辐射体2位于天线支架上，所述第一辐射体2所在的平面与所述印刷电路板1所在平面之间的垂直距离可以在2毫米-6毫米之间，这样为天线设计留出一定的净空区域，提高天线的性能，同时实现了在较小的空间中设计出多谐振且带宽的天线。
可选的，至少一个第二辐射体5也可以位于天线支架上。第一电容结构3和/或第二电容结构4也可以位于天线支架上。
需要说明的是，当天线中包括多个辐射体时，所述天线中的不同辐射体会产生相对应的谐振频率，一般情况下，各个辐射体会对产生的相 对应的谐振频率主要进行发射和接收。
实施例二
本发明实施例针对实施例一中所述的天线，建立了仿真天线模型，进行了仿真和实际测试。
如图18所示，所述天线包括：第一辐射体2、第一电容结构3、第二电容结构4、一个呈“L”型的第二辐射体51，两个呈“匚”型的第二辐射体53和第二辐射体54。
其中，第一电容结构3包括所述“E”型部件和所述“U”型部件，第二电容结构4为一般电容积层组件，所述第一辐射体2的第一端21与所述第一电容结构3的第三分支33连接，所述第二辐射体51的一端与所述第一电容结构3的第一分支31连接，所述第二辐射体53的第一端53a与所述第一电容结构3的第一分支31连接，所述第二辐射体54的第一端54a与所述第一电容结构3的第三分支33连接，且所述第二辐射体53的第二端53b与所述第二辐射体54的第二端54b相对且不接触，形成耦合结构。
为了方便理解所述天线，图19为对图18所述天线的平面示意图，图19中以D、E、F、C、A表示所述第一辐射体2，以F、K表示所述第二辐射体51，以F、I、J表示所述第二辐射体53，以F、G、H表示所述第二辐射体54，E、F所示的“E”型结构和“U”型结构为所述第一电容结构3，以Y表示所述第二电容结构4，A与B为所述印刷电路板的接地端，D为所述印刷电路板的信号馈电端，白色部分表示所述印刷电路板1。
如图20所示，为对图18所示天线的多频率谐振回损图，其中，横 坐标表示频率(Frequency，简称Freq)，单位为千兆赫兹(GHz)，纵坐标表示回波损耗，单位为分贝(dB)，由图20可以看出，该天线的低频工作频率(回波损耗低于-6dB)最低可达到680MHz(兆赫兹)左右，低频工作带宽为680MHz至接近960MHz，该天线的高频工作频率(回波损耗低于-6dB)最高可达到2800MHz以上，高频工作带宽为1440MHz左右至2800MHz以上。由此可以看出，该天线能够覆盖GSM/WCDMA/UMTS/LTE的低频段，以及DCS/PCS/WCDMA/UMTS/LTE的高频段，同时还能覆盖特殊频端LTE B7(2500MHz-2690MHz)和LTE B21(1447.9MHz-1510.9MHz)，以满足绝大多数无线终端业务对工作频段的需求。
由于回波损耗与驻波比可以进行相互转换，两者表示的含义相同，所以图21与图20所表示的含义相同，其中，图21为所述仿真天线模型的频率-驻波比图(频率响应图)，其中，横坐标表示频率，纵坐标为驻波比。
综上所述，本发明实施例所设计的天线，能够产生低频谐振和高频谐振，低频频率可覆盖680MHz-960MHz，高频频率可覆盖1440MHz-2800MHz；通过对分布电感和串联电容的调节，可以将谐振频率控制在特殊频带LTE B7(2500MHz-2690MHz)以及LTE B21(1447.9MHz-1510.9MHz)，以覆盖目前2G/3G/4G通讯系统所需的频段。
另外，由于在所述第一辐射体2的第一端21与第二端22之间通过第二电容结构4电性连接所述印刷电路板1的接地端12，因此可以通过调节所述第二电容结构4在所述第一辐射体2的第一端21与第二端22之间的位置，使得所述天线能够产生不同的谐振频率。
如图18所示，通过调节所述第一辐射体2、所述第二辐射体51、 所述第二辐射体53、所述第二辐射体54的电长度，以及所述第二电容结构4在所述第一辐射体2的第一端21与第二端22之间的位置，该天线所能产生多个谐振频率的示意图(图22中以f1-f5示例说明)；图23为图22所示天线的频率-驻波比图，其中，横坐标表示频率，单位为千兆赫兹(MHz)，纵坐标表示驻波比，所述第一辐射体2产生的第一谐振频率f1用于覆盖LTE B13、LTE B17、LTE B20、GSM850(824MHz-894MHz)、GSM900(880MHz-960MHz)等低频频段，所述第一辐射体2的F-C-B段产生的第二谐振频率f2可以覆盖LTE B21，所述第二辐射体51产生的第三谐振频率f3可以覆盖LTE B7，所述第二辐射体53产生的第四谐振频率f4可以覆盖WCDMA 2100，所述第二辐射体54产生的第五谐振频率f5可以覆盖LTE B3。综上所述，所述第一谐振频率f1可以覆盖GSM/WCDMA/UMTS/LTE的低频段，所述第二谐振频率f2可以覆盖特殊频端LTE B21，所述第三谐振频率f3、所述第四谐振频率f4以及所述第五谐振频率f5可以覆盖DCS/PCS/WCDMA/UMTS/LTE的高频段。
本发明实施例提供了一种天线，包括：第一辐射体、第一电容结构、第二电容结构以及三个第二辐射体，其中，所述第一辐射体的第一端通过所述第一电容结构电性连接所述印刷电路板的信号馈电端，所述第一辐射体的第二端电性连接所述印刷电路板的接地端，所述第一辐射体、所述第一电容结构、所述信号馈电端与所述接地端形成第一天线，用于产生第一谐振频率，并且所述第一辐射体的电长度为小于或等于所述第一谐振频率对应波长的八分之一，这样可以减小天线的体积。另外，通过所述第二辐射体和第二电容结构产生了其他谐振频率，使得该天线不仅具有多个谐振带宽，而且尺寸较小，可以在较小的空间中设计出多谐振宽带天线。
实施例三
本发明实施例提供了一种移动终端，如图24所示，所述移动终端包括射频处理单元、基带处理单元和天线；其中，
所述天线包括：第一辐射体2和第一电容结构3；所述第一辐射体2的第一端21通过所述第一电容结构3电性连接印刷电路板1的信号馈电端11，所述第一辐射体2的第二端22电性连接所述印刷电路板1的接地端12，所述第一辐射体2、所述第一电容结构2、所述信号馈电端11与所述接地端12形成第一天线，用于产生第一谐振频率f1，并且所述第一辐射体2的电长度小于或等于所述第一谐振频率f1对应波长的八分之一；
所述射频处理单元通过匹配电路与所述印刷电路板1的信号馈电端11电性连接；
所述天线，用于将接收到的无线信号传输给所述射频处理单元，或者将射频处理单元的发射信号转换为电磁波，发送出去；所述射频处理单元，用于对所述天线接收到的无线信号进行选频、放大、下变频处理，并将其转换成中频信号或基带信号发送给所述基带处理单元，或者，用于将所述基带处理单元发送的基带信号或中频信号经过上变频、放大，通过所述天线发送出去；所述基带处理单元，对接收到的所述中频信号或所述基带信号进行处理。
其中，所述匹配电路用于调节天线的阻抗，使其与射频处理单元的阻抗相匹配，以产生满足要求的谐振频率；所述第一谐振频率f1可以覆盖LTE B13、LTE B17、LTE B20等低频频段。
需要说明的是，所述第一辐射体2位于天线支架上，所述第一辐射体2所在的平面与所述印刷电路板1所在的平面之间的垂直距离在2毫米-6毫米之间，这样可以为天线设计出一定的净空区域，提高天线 的性能，同时实现了在较小的空间中设计出天线。
图25为对图24所示的移动终端的平面示意图，其中，以D、E、F、C、A表示所述第一辐射体2，以C1表示所述第一电容结构3，A表示所述印刷电路板1的接地端12，D表示所述印刷电路板1的信号馈电端11，所述匹配电路与所述印刷电路板1的信号馈电端11电性连接。
当然，本实施例中所述的天线也可以包括实施例一和实施例二所述的任一一种天线结构，具体可参考实施例一和实施例二所述的天线，在此不再赘述。其中，上述移动终端可以为在移动中使用的通讯设备，可以为手机，也可以为平板电脑，数据卡登，当然不限于此。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (21)

  1. 一种天线，其特征在于，包括：第一辐射体和第一电容结构；
    所述第一辐射体的第一端通过所述第一电容结构电性连接印刷电路板的信号馈电端，所述第一辐射体的第二端电性连接所述印刷电路板的接地端，所述第一辐射体、所述第一电容结构、所述信号馈电端与所述接地端形成第一天线，用于产生第一谐振频率，并且所述第一辐射体的电长度为小于或等于所述第一谐振频率对应波长的八分之一。
  2. 根据权利要求1所述的天线，其特征在于，所述天线还包括第二电容结构，所述第二电容结构的第一端电性连接所述第一端与所述第二端之间的所述第一辐射体，所述第二电容结构的第二端与所述印刷电路板的接地端电性连接。
  3. 根据权利要求1或2所述的天线，其特征在于，所述第一电容结构包括：“E”型部件和“U”型部件；
    所述“E”型部件包括第一分支、第二分支、第三分支和第四分支，其中所述第一分支和所述第三分支连接在所述第四分支的两端，所述第二分支位于所述第一分支与所述第三分支之间，所述第二分支与所述第四分支连接，所述第一分支与所述第二分支之间形成有间隙，所述第二分支与所述第三分支之间形成有间隙；
    所述“U”型部件包括两个分支，所述“U”型部件的两个分支分别位于所述“E”型部件的两个间隙中，且所述“E”型部件和所述“U”型部件之间互不接触。
  4. 根据权利要求3所述的天线，其特征在于，所述第一辐射体的第一端与所述第一电容结构的第一分支或第三分支电性连接。
  5. 根据权利要求2所述的天线，其特征在于，所述第二电容结构包 括：“E”型部件和“U”型部件；
    所述“E”型部件包括第一分支、第二分支、第三分支和第四分支，其中所述第一分支和所述第三分支连接在所述第四分支的两端，所述第二分支位于所述第一分支与所述第三分支之间，所述第二分支与所述第四分支连接，所述第一分支与所述第二分支之间形成有间隙，所述第二分支与所述第三分支之间形成有间隙；
    所述“U”型部件包括两个分支，所述“U”型部件的两个分支分别位于所述“E”型部件的两个间隙中，且所述“E”型部件和所述“U”型部件之间互不接触。
  6. 根据权利要求1或2所述的天线，其特征在于，所述天线还包括：至少一个第二辐射体，所述第二辐射体的一端与所述第一辐射体的第一端电性连接。
  7. 根据权利要求6所述的天线，其特征在于，所述天线还包括：一个呈“L”型的第二辐射体，所述呈“L”型的第二辐射体的一端与所述第一辐射体的第一端电性连接。
  8. 根据权利要求6所述的天线，其特征在于，所述天线还包括：一个呈“匚”型的第二辐射体，所述呈“匚”型的第二辐射体的一端与所述第一辐射体的第一端电性连接。
  9. 根据权利要求6所述的天线，其特征在于，所述天线还包括：两个呈“匚”型的第二辐射体，所述两个呈“匚”型的第二辐射体的开口相对，其中各第二辐射体的第一端与所述第一辐射体的第一端电性连接，所述各第二辐射体的第二端相对且不接触，以形成耦合结构。
  10. 根据权利要求3所述的天线，其特征在于，所述天线还包括：至少一个第二辐射体，所述第二辐射体的一端与所述第一分支和所述第 三分支中的其中一个分支电性连接。
  11. 根据权利要求10所述的天线，其特征在于，所述天线包括一个呈“L”型的第二辐射体，所述呈“L”型的第二辐射体的一端与所述第一分支电性连接。
  12. 根据权利要求10所述的天线，其特征在于，所述天线包括：一个呈“匚”型的第二辐射体，所述呈“匚”型的第二辐射体的第一端与所述第一分支和所述第三分支中的其中一个分支电性连接。
  13. 根据权利要求10所述的天线，其特征在于，所述天线还包括：两个呈“匚”型的第二辐射体，所述两个呈“匚”型的第二辐射体的开口相对，其中一个第二辐射体与所述第一分支电性连接，另一个第二辐射体与所述第三分支电性连接，所述各第二辐射体的第二端相对且不接触，以形成耦合结构。
  14. 根据权利要求1-13任一所述的天线，其特征在于，所述第一辐射体位于天线支架上，所述第一辐射体所在的平面与所述印刷电路板所在的平面之间的距离在2毫米-6毫米之间。
  15. 一种移动终端，其特征在于，包括射频处理单元、基带处理单元和天线；其中，
    所述天线包括：第一辐射体和第一电容结构；所述第一辐射体的第一端通过所述第一电容结构电性连接印刷电路板的信号馈电端，所述第一辐射体的第二端电性连接所述印刷电路板的接地端，所述第一辐射体、所述第一电容结构、所述信号馈电端与所述接地端形成第一天线，用于产生第一谐振频率，所述第一辐射体的电长度为小于或等于所述第一谐振频率对应波长的八分之一；
    所述射频处理单元通过匹配电路与所述印刷电路板的信号馈电端电 性连接；
    所述天线，用于将接收到的无线信号传输给所述射频处理单元，或者将射频处理单元的发射信号转换为电磁波，发送出去；所述射频处理单元，用于对所述天线接收到的无线信号进行选频、放大、下变频处理，并将其转换成中频信号或基带信号发送给所述基带处理单元，或者，用于将所述基带处理单元发送的基带信号或中频信号经过上变频、放大，通过所述天线发送出去；所述基带处理单元，对接收到的所述中频信号或所述基带信号进行处理。
  16. 根据权利要求15所述的移动终端，其特征在于，所述天线还包括第二电容结构，所述第二电容结构的第一端电性连接所述第一端与所述第二端之间的所述第一辐射体，所述第二电容结构的第二端与所述印刷电路板的接地端电性连接。
  17. 根据权利要求15或16所述的移动终端，其特征在于，所述第一电容结构包括：“E”型部件和“U”型部件；
    所述“E”型部件包括第一分支、第二分支、第三分支和第四分支，其中所述第一分支和所述第三分支连接在所述第四分支的两端，所述第二分支位于所述第一分支与所述第三分支之间，所述第二分支与所述第四分支连接，所述第一分支与所述第二分支之间形成有间隙，所述第二分支与所述第三分支之间形成有间隙；
    所述“U”型部件包括两个分支，所述“U”型部件的两个分支分别位于所述“E”型部件的两个间隙中，且所述“E”型部件和所述“U”型部件之间互不接触。
  18. 根据权利要求17所述的移动终端，其特征在于，所述第一辐射体的第一端与所述第一电容结构的第一分支或第三分支电性连接。
  19. 根据权利要求15或16所述的移动终端，其特征在于，所述天线还包括：至少一个第二辐射体，所述第二辐射体的一端与所述第一辐射体的第一端电性连接。
  20. 根据权利要求17所述的移动终端，其特征在于，所述天线还包括：至少一个第二辐射体，所述第二辐射体的一端与所述第一分支和所述第三分支中的其中一个分支电性连接。
  21. 根据权利要求15-20任一所述的移动终端，其特征在于，所述第一辐射体位于天线支架上，所述第一辐射体所在的平面与所述印刷电路板所在的平面之间的距离在2毫米-6毫米之间。
PCT/CN2015/072407 2014-02-12 2015-02-06 一种天线及移动终端 Ceased WO2015120780A1 (zh)

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