CN108767450B - Antenna system and terminal - Google Patents
Antenna system and terminal Download PDFInfo
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- CN108767450B CN108767450B CN201810660458.8A CN201810660458A CN108767450B CN 108767450 B CN108767450 B CN 108767450B CN 201810660458 A CN201810660458 A CN 201810660458A CN 108767450 B CN108767450 B CN 108767450B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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Abstract
本发明提供一种天线系统及终端，该天线系统应用于具有金属壳体的终端，所述金属壳体上设有填充非金属材料的缝隙，所述金属壳体通过所述缝隙分隔形成有谐振臂和耦合臂；所述天线系统包括所述谐振臂、所述耦合臂、馈源电路、第一调谐电路和第二调谐电路；其中，所述馈源电路连接于所述谐振臂的第一馈点与接地端之间，所述第一调谐电路与所述馈源电路并联，所述第二调谐电路连接于所述耦合臂的第二馈点与接地端之间。本发明可以实现天线系统低频和中高频的独立调谐，能有效实现载波聚合天线系统，提高天线系统的辐射效率，实现宽频段的覆盖。
The present invention provides an antenna system and a terminal. The antenna system is applied to a terminal with a metal shell, the metal shell is provided with a gap filled with non-metallic materials, and the metal shell is separated by the gap to form a resonance an arm and a coupling arm; the antenna system includes the resonance arm, the coupling arm, a feed circuit, a first tuning circuit and a second tuning circuit; wherein the feed circuit is connected to the first of the resonance arm Between the feed point and the ground terminal, the first tuning circuit is connected in parallel with the feed source circuit, and the second tuning circuit is connected between the second feed point of the coupling arm and the ground terminal. The invention can realize the independent tuning of the low frequency and the medium and high frequency of the antenna system, can effectively realize the carrier aggregation antenna system, improve the radiation efficiency of the antenna system, and realize the coverage of the wide frequency band.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to an antenna system and a terminal.
Background
With the development and progress of science and technology, the communication technology has been developed rapidly and greatly, and with the improvement of the communication technology, the popularization of electronic products has been improved to an unprecedented level, and more terminals such as mobile phones, smart televisions, computers and the like become an indispensable part of the life of people.
While the terminal is popularized, the user has higher and higher requirements on the types and performances of the functions of the terminal, such as an audio function, a photographing function, a camera shooting function, a quick charging function and the like, which are necessary functions of the terminal.
As the functions of the terminal are more and more improved, the appearance and the texture of the terminal become the pursuit of users, and the terminal with the metal shell is more and more favored by users due to the excellent metal texture. However, under the requirements of enhancement of the metallic texture of the terminal housing and the requirement of the antenna that the clearance area is smaller and smaller, the Q value of the antenna is increased, the radiation efficiency of the antenna is reduced, and the bandwidth is narrowed, so that the existing antenna is difficult to realize wide-band coverage.
Disclosure of Invention
The embodiment of the invention provides an antenna system and a terminal, which aim to solve the problem that the existing antenna is difficult to realize wide-band coverage.
In order to solve the above problems, the present invention is realized by:
in a first aspect, an embodiment of the present invention provides an antenna system, which is applied to a terminal having a metal housing, where a gap filled with a non-metal material is formed in the metal housing, and the metal housing is partitioned by the gap to form a resonant arm and a coupling arm; the antenna system comprises the resonance arm, the coupling arm, a feed source circuit, a first tuning circuit and a second tuning circuit; the feed source circuit is connected between a first feed point and a grounding end of the resonance arm, the first tuning circuit is connected with the feed source circuit in parallel, and the second tuning circuit is connected between a second feed point and the grounding end of the coupling arm.
In a second aspect, an embodiment of the present invention further provides a terminal, where the terminal includes the antenna system and a metal housing, where a gap filled with a non-metal material is formed on the metal housing, and the metal housing is separated by the gap to form a resonant arm and a coupling arm; the antenna system comprises the resonance arm, the coupling arm, a feed source circuit, a first tuning circuit and a second tuning circuit; the feed source circuit is connected between a first feed point and a grounding end of the resonance arm, the first tuning circuit is connected with the feed source circuit in parallel, and the second tuning circuit is connected between a second feed point and the grounding end of the coupling arm.
In this way, a metal shell is provided with two cantilevers, namely a resonant arm and a coupling arm, which are separated by a gap filled with a non-metal material, the resonant arm is provided with a feed source circuit, a first tuning circuit is connected with the feed source circuit in parallel, and the coupling arm is provided with a second tuning circuit. Therefore, the low-frequency tuning of the antenna system can be realized through the resonance arm, the feed source circuit and the first tuning circuit, the medium-high frequency tuning of the antenna system is realized through the resonance arm, the feed source circuit and the second tuning circuit, the low-frequency and medium-high frequency independent tuning of the antenna system is further realized, the carrier aggregation antenna system can be effectively realized, the radiation efficiency of the antenna system is improved, and the coverage of a wide frequency band is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a block diagram of a metal housing provided by an embodiment of the present invention;
fig. 2 is one of the structural diagrams of an antenna system provided by the embodiment of the present invention;
fig. 3 is a second structural diagram of an antenna system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1 to fig. 3.
In the embodiment of the present invention, the antenna system may be applied to a terminal having a metal case. The metal shell may be a rear shell of the terminal, or a middle frame or other metal components of the terminal, which may be determined according to an actual structure of the terminal, and is not limited in this embodiment of the present invention.
The terminal may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or the like.
As shown in fig. 1, the metal shell 10 is provided with a gap 11 filled with a non-metal material. The slot 11 separates the metal housing 10 into a body 12 and two metal cantilevers, namely a resonator arm 13 and a coupling arm 14. It should be noted that a gas, such as air, may also be understood as a non-metallic material.
The resonant arm 13 and the coupling arm 14 are grounded at one end and free ends at the other end, and the free end of the resonant arm 13 is opposite to the free end of the coupling arm 14 and is spaced apart from the opening 110 of the slot 11.
It should be understood that the grounding manner of the resonant arm 13 and the end of the coupling arm 14 grounded is not limited by the embodiments of the present invention. In a specific implementation, the ends of the resonating arm and the coupling arm 14 that are grounded may be grounded by being fixedly connected to the body 12, or may be grounded by being connected to a ground terminal. In the embodiment of the present invention, the ground terminal may be an antenna reference ground or a main ground, i.e., a main floor. Specifically, a main board (PCB) and a large piece of integrated metal connected thereto form an induced current with an antenna radiator, i.e., a feed, as a reference ground of the antenna.
In fig. 1, the slot 11 is L-shaped, and the resonant arm 13 and the coupling arm 14 are respectively located at the edge positions of two adjacent sides of the metal shell 10, specifically, the resonant arm 13 is located at the top edge position of the metal shell, and the coupling arm 14 is located at the right edge position of the metal shell 10. It should be understood, however, that the invention is not limited thereby to the shape of the slot, and the position of the resonator arm 13 and the coupling arm 14 in the metal housing 10. In other embodiments, the slot 11 may have other shapes, and the positions of the resonant arm 13 and the coupling arm 14 in the metal housing 10 may be specifically determined according to the shape of the slot 11, which is not limited in the embodiment of the present invention.
For example, in some embodiments, the slot 11 may be linear, in which the resonant arm 13 and the coupling arm 14 are located at the same edge position of the metal shell 10, and the free end of the resonant arm 13 is opposite to the free end of the coupling arm 14 and is spaced apart from the opening 110 of the slot 11.
As shown in fig. 2, the antenna system includes a resonance arm 13, a coupling arm 14, a feed circuit 21, a first tuning circuit 22, and a second tuning circuit 23. The feed circuit 21 is connected between the first feed point 131 of the resonant arm 13 and the ground, the first tuning circuit 22 is connected in parallel with the feed circuit 21, and the second tuning circuit 23 is connected between the second feed point 141 of the coupling arm 14 and the ground.
The length of the resonant arm 13 may be greater than the length of the coupling arm 14, the resonant arm 13 may be used to generate a low-frequency resonant mode, and the coupling arm 14 may be used to generate a medium-high frequency resonant mode. Thus, the resonating arm 13 may be referred to as a low frequency resonating arm, and the coupling arm 14 may be referred to as a medium-high frequency coupling arm.
The first tuning circuit 22 is used for implementing low-frequency tuning, so that the resonant arm 13 can implement low-frequency resonance of different frequency bands; the second tuning circuit 23 is used to implement medium-high frequency tuning, so that the coupling arm 14 can implement medium-high frequency resonance of different frequency bands.
The feed circuit 21 is for radiating electromagnetic wave energy and the feed circuit 21 may comprise at least two branches to provide different radiated energies. The resonant arm 13 is connected to the feed circuit 21, and therefore, the resonant arm 13 can be directly fed through the feed circuit 21. The coupling arm 14 is not connected to the feed circuit 21, but the coupling arm 14 can be fed in a coupled manner, i.e. the radiation energy of the feed circuit 21 can be transferred in a coupled manner to the coupling arm 14 via the resonant arm 13 through the opening 110 of the slot 11.
In the antenna system of this embodiment, a metal casing is provided with two cantilevers, namely a resonant arm and a coupling arm, which are separated by a gap filled with a non-metal material, the resonant arm is provided with a feed circuit, a first tuning circuit connected in parallel with the feed circuit, and the coupling arm is provided with a second tuning circuit. Therefore, the low-frequency tuning of the antenna system can be realized through the resonance arm, the feed source circuit and the first tuning circuit, the medium-high frequency tuning of the antenna system is realized through the resonance arm, the feed source circuit and the second tuning circuit, the low-frequency and medium-high frequency independent tuning of the antenna system is further realized, the carrier aggregation antenna system can be effectively realized, the radiation efficiency of the antenna system is improved, and the coverage of a wide frequency band is realized.
Alternatively, the first feed point 131 may be near the free end of the resonator arm 13; the second feed point 141 may be near the free end of the coupling arm 14. In this way, in a scenario where the coupling arm 14 feeds power by coupling, the distances among the first feed point 131, the opening 110, and the second feed point 141 can be shortened, so that the coupling effect can be improved, and the coverage bandwidth can be increased.
Alternatively, the feed circuit 21 may include a first antenna switch 211, a feed matching circuit 212, and a feed 213 connected in series. In a specific implementation, the order of the first antenna switch 211, the feed matching circuit 212, and the feed 213 in the feed circuit 21 may be set according to actual needs, which is not limited in the embodiment of the present invention.
Illustratively, as shown in fig. 2, the feed circuit 21 may include a first antenna switch 211, a feed matching circuit 212, and a feed 213 connected in series in this order; the first antenna switch 211 is connected to the first feed point 131, and the feed 213 is connected to the ground.
Specifically, the feed 213 is an antenna radiator, and as a carrier for radiating electromagnetic wave energy, may be a metal sheet, but is not limited thereto.
The first antenna switch 211 may be a radiation mode tuning switch for turning on the feed matching circuit 212, the feed 213, and the resonant arm 13. In a specific implementation, the first antenna switch 211 may be a logic circuit having more than m conducting states, and correspondingly, the feed matching circuit 212 may include n sub-feed matching circuit branches, and at least one of the capacitors and the inductors of each branch is configured differently. Where m is a positive integer greater than 1, and n may be a positive integer greater than or equal to m.
Therefore, different sub-feed source matching circuits can be switched on by controlling different conduction states of the first antenna switch 211, so that the feed source circuit 21 is controlled to be in different radiation modes, and tuning of different frequency bands of the antenna system is further realized.
Alternatively, the first antenna switch 211 may include a first control terminal, a first terminal, and a second terminal; feed matching circuit 212 may include a first sub-feed matching circuit 2121 and a second sub-feed matching circuit 2122; a first end of the first antenna switch 211 is electrically connected to the first sub-feed matching circuit 2121, and a second end of the first antenna switch 211 is electrically connected to the second sub-feed matching circuit 2122.
Further, as shown in fig. 2, the first control terminal of the first antenna switch 211 may be connected to the first feed point 131. In other embodiments, the first control terminal of the first antenna switch 211 may be connected to the feed source 213, which may be determined according to actual needs, and is not limited in this embodiment of the present invention.
It should be understood that the matching of at least one of the capacitance and the inductance of the first sub-feed matching circuit 2121 and the second sub-feed matching circuit 2122 is different, so that the feed circuit 21 can be controlled to be in different radiation modes when the first antenna switch 211 is in different conducting states.
Specifically, in a case where the control terminal of the first antenna switch 211 is connected to the first terminal of the first antenna switch 211, the first antenna switch 211 is in the first conductive state. The feed 213 of the feed circuit 21 and the first sub-feed matching circuit are in operation and the feed circuit 21 is in a first radiation mode.
In case the control terminal of the first antenna switch 211 is connected to the second terminal of the first antenna switch 211, the first antenna switch 211 is in the second conductive state. The feed 213 and the second sub-feed matching circuit 2122 of the feed circuit 21 are in an operational state, and the feed circuit 21 is in a second radiation mode.
Optionally, the first tuning circuit 22 includes a first tuning switch 221 and a first tuning matching circuit 222 connected in series. In a specific implementation, the order of the first tuning switch 221 and the first tuning matching circuit 222 in the first tuning circuit 22 may be set according to actual needs, which is not limited in the embodiment of the present invention.
For example, as shown in fig. 2, one end of the first tuning switch 221 may be connected to the first feed point 131, the other end of the first tuning switch 221 may be connected to one end of the first tuning matching circuit 222, and the other end of the first tuning matching circuit 222 is connected to the ground.
Specifically, the first tuning switch 221 is used to adjust the electrical length of the resonant arm 13 to realize low-frequency tuning, and therefore, the first tuning switch 221 may be a low-frequency band (below 1 GHz) antenna tuning switch.
In a specific implementation, the first tuning switch 221 may be a logic circuit having more than k conducting states, and correspondingly, the first tuning matching circuit 222 may include j sub-tuning matching circuits, and at least one of the capacitance and the inductance of each branch circuit is configured differently. Where k is a positive integer greater than 1, and j may be a positive integer greater than or equal to k.
Thus, tuning of different frequency bands in the low frequency band of the antenna system can be achieved by controlling different conducting states of the first tuning switch 221.
Optionally, the first tuning switch 221 includes a second control terminal, a third terminal, and a fourth terminal; the first tuning matching circuit 222 includes a first sub-tuning matching circuit 2221 and a second sub-tuning matching circuit 2222; the third terminal of the first tuning switch 221 is electrically connected to the first sub-tuning matching circuit 2221, and the fourth terminal of the first tuning switch 221 is electrically connected to the second sub-tuning matching circuit 2222.
Further, as shown in fig. 2, a second control terminal of the first tuning switch 221 may be connected to the first feed point 131. Of course, in other embodiments, the second control terminal of the first tuning switch 221 may be connected to the ground terminal, which may be determined according to actual needs, and is not limited in this embodiment of the invention.
It should be understood that at least one of the capacitance and the inductance of the first sub-tuning matching circuit 2221 and the second sub-tuning matching circuit 2222 are configured differently, so that when the first tuning switch 221 is in different conducting states, tuning of different frequency bands in the low frequency band of the antenna system can be achieved.
Specifically, in the case that the second control terminal of the first tuning switch 221 is connected to the third terminal of the first tuning switch 221, the first tuning switch 221 is in the first conducting state. The first sub-tuning matching circuit 2221 of the first tuning circuit 22 is in an operating state, and tuning of the first frequency band in the low frequency band of the antenna system can be realized.
In a case where the second control terminal of the first tuning switch 221 is connected to the third terminal of the first tuning switch 221, the first tuning switch 221 is in the second conductive state. The second sub-tuning matching circuit 2222 of the first tuning circuit 22 is in an operating state, and tuning of the second frequency band in the low frequency band of the antenna system can be realized.
The specific ranges of the first frequency band in the low frequency band and the second frequency band in the low frequency band may be determined according to the structural design of the antenna system, for example, the specific representation forms of the tuning elements in the first sub-tuning matching circuit 2221 and the second sub-tuning matching circuit 2222, which is not limited in the embodiment of the present invention.
Further, as shown in fig. 3, the first tuning circuit 22 may further include a first tuning element 223, one end of the first tuning element 223 is electrically connected to the first feed point 131, and a second end of the first tuning element 223 is electrically connected to the ground terminal.
As shown in fig. 3, the first tuning element 223 is connected in parallel with the first tuning switch 221 and the first tuning matching circuit 222, forming a parallel structure.
The first tuning element 223 is mainly used for tuning low frequency matching, and realizes matching tuning of electrical length of a specific frequency band below 1 GHz. In this embodiment, as shown in fig. 3, the first tuning element 223 may be represented as a bypass inductance component, but is not limited thereto, and in some embodiments, the first tuning element 223 may also be represented as a bypass capacitance component, which may be determined according to practical requirements, and is not limited by the embodiments of the present invention.
In fig. 3, the first tuning element 223 is a branch of the first tuning circuit 22, i.e. the first tuning element 223 is arranged in combination with the first tuning circuit 22. It should be understood that in other embodiments, the first tuning element 223 may be provided separately from the first tuning circuit 22.
Alternatively, as shown in fig. 2, the second tuning circuit 23 includes a second tuning switch 231 and a second tuning matching circuit 232 connected in series in this order. In a specific implementation, the order of the second tuning switch 231 and the second tuning matching circuit 232 in the second tuning circuit 23 may be set according to actual needs, which is not limited in the embodiment of the present invention.
For example, as shown in fig. 2, one end of the second tuning switch 231 may be connected to the second feed point 141, the other end of the second tuning switch 231 may be connected to one end of the second tuning matching circuit 232, and the other end of the second tuning matching circuit 232 is connected to the ground terminal.
The second tuning switch 231 is used to adjust the electrical length of the coupling arm 14 to implement medium-high frequency tuning, and therefore, the second tuning switch 231 may be a medium-high frequency (1.7 GHz-2.7 GHz) antenna tuning switch.
In a specific implementation, the second tuning switch 231 may be a logic circuit having more than p conducting states, and correspondingly, the second tuning matching circuit 232 may include q sub-tuning matching circuits, and at least one of the capacitance and the inductance of each branch circuit is configured differently. Wherein p is a positive integer greater than q, and p is a positive integer greater than or equal to q.
In this way, tuning of different frequency bands in the high frequency band in the antenna system can be achieved by controlling different conducting states of the second tuning switch 231.
Optionally, the second tuning switch 231 includes a third control terminal, a fifth terminal and a sixth terminal; the second tuning matching circuit 232 includes a third sub-tuning matching circuit 2321 and a fourth sub-tuning matching circuit 2322; the fifth terminal of the second tuning switch 231 is electrically connected to the third sub-tuning matching circuit 2321, and the sixth terminal of the second tuning switch 231 is electrically connected to the fourth sub-tuning matching circuit 2322.
Further, as shown in fig. 2, a third control terminal of the second tuning switch 231 may be connected to the second feed point 141. Of course, in other embodiments, the third control terminal of the second tuning switch 231 may be connected to the ground terminal, which may be determined according to actual needs, and is not limited in this embodiment of the present invention.
It should be understood that at least one of the capacitance and the inductance of the third sub-tuning matching circuit 2321 and the fourth sub-tuning matching circuit 2322 are configured differently, so that when the second tuning switch 231 is in different conducting states, tuning of different frequency bands in a high frequency band in the antenna system can be achieved.
Specifically, in the case that the third control terminal of the second tuning switch 231 is connected to the fifth terminal of the second tuning switch 231, the second tuning switch 231 is in the first conductive state. The third sub-tuning matching circuit 2321 of the second tuning circuit 23 is in an operating state, and tuning of the first frequency band in the middle frequency band or the high frequency band of the antenna system can be achieved.
In a case where the third control terminal of the second tuning switch 231 is connected to the sixth terminal of the second tuning switch 231, the second tuning switch 231 is in the second conductive state. The fourth sub-tuning matching circuit 2322 of the second tuning circuit 23 is in an operating state, and tuning of the second frequency band in the middle frequency band or the high frequency band of the antenna system can be achieved.
The specific range of the first frequency band in the middle frequency band or the high frequency band and the specific range of the second frequency band in the middle frequency band or the high frequency band may be determined according to the structural design of the antenna system, for example, the specific representation forms of the tuning elements in the third sub-tuning matching circuit 2321 and the fourth sub-tuning matching circuit 2322, which is not limited in the embodiment of the present invention.
Further, as shown in fig. 3, the second tuning circuit 23 further includes a second tuning element 233, one end of the second tuning element 233 is electrically connected to the first feed point 131, and the other end of the second tuning element 233 is electrically connected to the ground.
As shown in fig. 3, the second tuning element 233 is connected in parallel to the second tuning switch 231 and the second tuning matching circuit 232 to form a parallel structure.
The second tuning element 233 is mainly used for tuning medium-high frequency matching, and realizes matching tuning of the electrical length of a specific frequency band of 1.7GHz to 2.7 GHz. In a specific implementation, as shown in fig. 3, the second tuning element 233 may be represented as a bypass inductance component, but is not limited thereto, and in some embodiments, the second tuning element 233 may also be represented as a bypass capacitance component, which may be determined according to practical requirements, and is not limited by the embodiments of the present invention.
In fig. 3, the second tuning element 233 is a branch of the second tuning circuit 23, i.e. the second tuning element 233 is arranged in combination with the second tuning circuit 23. It should be understood that in other embodiments, the second tuning element 233 may be provided separately from the second tuning circuit 23.
It should be noted that, in the embodiment of the present invention, both the switch and the matching circuit may be disposed on the main board of the terminal, and at this time, the switch may be connected to the feed point through a metal connecting component. For example, the first tuning switch 221 and the first tuning matching circuit 222 may be disposed on the main board of the terminal, and in this case, the first tuning switch 221 may be connected to the first feed point 131 of the resonant arm 13 through a metal connecting member.
The matching circuit is used for adjusting the impedance in the working frequency band, so that the front impedance and the rear impedance of the circuit are conjugated and well matched. When the switch has a logic circuit with at least two conducting states, the switch may be embodied as a single-pole multi-throw switch, for example, when the switch has a logic circuit with two conducting states, the switch may be embodied as a single-pole double-throw switch, but is not limited thereto.
In addition, in the matching circuit of any branch, the switch and its accessory matching circuit can be interchanged to generate the same function, for example, in the first tuning circuit 22, the first tuning matching circuit 222 can be connected to the ground terminal through the first tuning switch 221.
It should be noted that various optional embodiments described in the embodiments of the present invention, as shown in fig. 3, may be implemented in combination with each other; but also can be realized independently, and the embodiment of the invention is not limited.
The antenna system of the embodiment of the invention at least has the following improvement points:
on the one hand, it is possible to realize relative frequency independence on the antenna structure by designing the low frequency resonance arm 13 and the medium and high frequency coupling arm 14.
On the other hand, the first tuning switch 221 provided on the resonance arm 13 is used for low frequency tuning, and the second tuning switch 231 provided on the coupling arm 14 is used for medium and high frequency tuning, so that relatively independent switch tuning modes can be realized.
The feed source matching circuit 212, the first tuning matching circuit 222, and the second tuning matching circuit 232 may be complex matching circuits formed by at least one of an inductor and a capacitor, and may be specifically set according to the antenna design requirement, which is not limited in the embodiment of the present invention.
After the structures of the feed matching circuit 212, the first tuning matching circuit 222 and the second tuning matching circuit 232 are determined, in a concrete implementation, the frequency band of the antenna system and the width of the frequency band bandwidth can be adjusted by adjusting the combination of the on and off states of the first antenna switch 211, the first tuning switch 221 and the second tuning switch 231, so that the antenna can cover the low-medium frequency band bandwidth while meeting the requirements of metal shell texture and small headroom environment.
The following illustrates the design of inter-band CA (Carrier Aggregation) antenna tuning for different scenarios.
Wherein, LB (Low Band, Low frequency Band) can be expressed as a frequency Band of 700MHz to 960 MHz; the MB (Middle Band, intermediate frequency Band) may be specifically represented as a frequency Band of 1710MHz to 2170 MHz; HB (High Band, intermediate frequency Band) can be embodied as a frequency Band of 2300MHz-2690 MHz. It should be understood that the protocol may repartition the range of frequency bands it includes, and the present invention may be unaffected by the repartition.
Scene one, LB and MB inter-band CA antenna tuning designs.
Example 1, B5, and B3 carrier aggregation antenna designs.
Wherein B5 belongs to LB, B3 belongs to MB.
In a specific implementation, the resonant arm 13 may adjust the auxiliary matching element of the first tuning switch 221, that is, the matching element in the first tuning matching circuit 222, to tune to the B5 frequency band by adjusting the conducting state of the first tuning switch 221, at this time, the auxiliary matching element of the first antenna switch 211, that is, the matching element in the feed matching circuit 212, may be set to be a capacitor, and the capacitor may be used in a medium-high frequency carrier aggregation state.
B3 can be tuned by the open-ended coupling, the length design adjustment of the coupling arm 14, and the on-state adjustment of the second tuning switch 231, and the tuning element in the second tuning matching circuit 232 can be configured as an inductor, but is not limited thereto.
In practical applications, the distance between the opening 110 of the slot 11, i.e. the free ends of the resonant arm 13 and the coupling arm 14, is required to ensure that the rf energy of the feed 213 can be coupled to the coupling arm 14 via the resonant arm 13 and through the opening 110, and may be specifically set to 1.2 mm, 1.5 mm, or 1.8 mm, but is not limited thereto.
Example 2, B5, and B1 carrier aggregation antenna designs.
Wherein B5 belongs to LB, B1 belongs to MB.
The principle of tuning the resonating arm 13 to the B5 frequency band is the same as that in example 1, and reference may be specifically made to the description in example 1, and details are not described here. On the basis of the fixed structure of the antenna system (e.g., the open-end coupling and the length of the resonant arm are designed), B1 resonance can be achieved by adjusting the conducting state of the second tuning switch 231 and adjusting the accessory matching element of the second tuning switch 231, i.e., the tuning element in the second tuning matching circuit 232, where the tuning element in the second tuning matching circuit 232 may be an inductor.
Scene two, the design of CA antenna tuning between LB and HB bands.
Example 3, B28, and B7 carrier aggregation antenna designs.
Wherein B28 belongs to LB, B7 belongs to HB.
On the basis of the fixed structure of the antenna system (e.g., the open-end coupling and the length of the resonant arm 13 are designed), the auxiliary matching element of the first tuning switch 221, i.e., the tuning element in the first tuning matching circuit 222, can be adjusted to tune to the B28 frequency band by adjusting the conducting state of the first tuning switch 221, and at this time, the tuning element in the first tuning matching circuit 222 can be set as a capacitive element.
Adjusting the conducting state of the second tuning switch 231 adjusts the accessory matching element of the second tuning switch 231, i.e. the tuning element in the second tuning matching circuit 232, to achieve B1 resonance, in which case, the tuning element in the second tuning matching circuit 232 may be an inductor. Further, in the case where inductive tuning B7 is not effective enough, the second tuned matching circuit 232 can be configured to be capacitively tuned, which can more effectively control the resonant frequency of the coupling arm 14.
Scene three, the design of CA antenna tuning between MB bands.
Example 4, B1, and B3 carrier aggregation antenna designs.
The B1 and B3 carrier aggregation antenna designs can be realized by adjusting the conductive state of the second tuning switch 231 to adjust the auxiliary inductance element parameter of the second tuning switch 231, i.e., the inductance element parameter in the second tuning matching circuit 232, and by adjusting the conductive state of the first antenna switch 211 to adjust the auxiliary capacitance element parameter of the first antenna switch 211, i.e., the capacitance element parameter in the first tuning matching circuit 222.
Scene three, a CA antenna tuning design between MB and HB bands.
Example 5, B3, and B7 carrier aggregation antenna designs.
Among them, B3 belongs to MB and B7 belongs to HB.
In the first mode, the parameters of the auxiliary inductance element of the second tuning switch 231, that is, the parameters of the inductance element in the second tuning matching circuit 232, may be adjusted by adjusting the conducting state of the second tuning switch 231, and the parameters of the auxiliary capacitance element of the first antenna switch 211, that is, the parameters of the capacitance element in the first tuning matching circuit 222, may be adjusted by adjusting the conducting state of the first antenna switch 211, so that the B3 and B7 carrier aggregation antenna design may be implemented.
In a second mode, the parameters of the auxiliary inductance element of the second tuning switch 231, that is, the parameters of the inductance element in the second tuning matching circuit 232, can be adjusted by adjusting the conducting state of the second tuning switch 231, and the operating state of the auxiliary inductance element of the first tuning switch 221, that is, the operating state of the inductance element in the first tuning matching circuit 222, can be adjusted by adjusting the conducting state of the first tuning switch 221, so that the B3 and B7 carrier aggregation antenna design can be implemented.
The antenna tuning design principles referred to above are not exhaustive.
The embodiment of the invention also provides a terminal, which comprises the antenna system and the metal shell, wherein the metal shell is provided with a gap filled with a non-metal material, and the metal shell is separated by the gap to form a resonant arm and a coupling arm; the antenna system comprises the resonance arm, the coupling arm, a feed source circuit, a first tuning circuit and a second tuning circuit; the feed source circuit is connected between a first feed point and a grounding end of the resonance arm, the first tuning circuit is connected with the feed source circuit in parallel, and the second tuning circuit is connected between a second feed point and the grounding end of the coupling arm.
The structure of the antenna system may refer to the above embodiments, and is not described herein again. Because the antenna system in the above embodiment is adopted, the terminal provided by the embodiment of the present invention has all the effects of the above antenna system, and is not described herein again to avoid repetition.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
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| CN108832267B (en) * | 2018-05-29 | 2024-05-17 | Oppo广东移动通信有限公司 | Electronic Devices |
| CN109546305A (en) * | 2018-11-14 | 2019-03-29 | 维沃移动通信有限公司 | A kind of communication terminal |
| CN109830815B (en) * | 2018-12-24 | 2021-04-02 | 瑞声科技（南京）有限公司 | Antenna system and mobile terminal applying same |
| CN109687106A (en) * | 2018-12-24 | 2019-04-26 | 瑞声科技（南京）有限公司 | The tuning methods of antenna modules, mobile terminal and antenna modules |
| CN109742512A (en) * | 2018-12-24 | 2019-05-10 | 瑞声科技（南京）有限公司 | Antenna modules and mobile terminal |
| CN109687111B (en) * | 2018-12-29 | 2021-03-12 | 维沃移动通信有限公司 | Antenna structure and communication terminal |
| CN109752945B (en) * | 2019-02-19 | 2024-07-09 | 深圳市和盈互联科技有限公司 | Intelligent watch tuning device |
| CN109888461A (en) * | 2019-03-04 | 2019-06-14 | 维沃移动通信有限公司 | A kind of antenna structure and communication terminal |
| CN111146562A (en) * | 2019-05-27 | 2020-05-12 | 广东小天才科技有限公司 | Tunable antenna and communication terminal |
| CN112151960A (en) * | 2019-06-28 | 2020-12-29 | 华为技术有限公司 | Foldable mobile terminal and antenna control method |
| CN110350295A (en) * | 2019-06-30 | 2019-10-18 | RealMe重庆移动通信有限公司 | Wearable electronic equipment |
| CN112928445B (en) | 2019-12-06 | 2023-01-10 | 北京小米移动软件有限公司 | Antenna structure and electronics |
| WO2021179825A1 (en) * | 2020-03-12 | 2021-09-16 | Oppo广东移动通信有限公司 | Antenna assembly and electronic device |
| CN113497345B (en) * | 2020-03-18 | 2024-06-25 | 北京小米移动软件有限公司 | Antenna structures and electronics |
| CN113708093B (en) * | 2020-05-22 | 2024-02-06 | 北京小米移动软件有限公司 | Antenna structure and electronic equipment |
| CN114284696A (en) * | 2020-09-27 | 2022-04-05 | 北京小米移动软件有限公司 | Antenna structure and terminal equipment |
| CN120414082A (en) * | 2020-12-18 | 2025-08-01 | 华为技术有限公司 | An electronic device |
| CN115133269B (en) * | 2021-03-26 | 2025-03-21 | Oppo广东移动通信有限公司 | Antenna components and electronic devices |
| CN115207631A (en) * | 2021-04-13 | 2022-10-18 | Oppo广东移动通信有限公司 | Antennas and Electronics |
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