CN1298079C - Double frequency band antenna for mobile communication unit - Google Patents
Double frequency band antenna for mobile communication unit Download PDFInfo
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- CN1298079C CN1298079C CNB991249771A CN99124977A CN1298079C CN 1298079 C CN1298079 C CN 1298079C CN B991249771 A CNB991249771 A CN B991249771A CN 99124977 A CN99124977 A CN 99124977A CN 1298079 C CN1298079 C CN 1298079C
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- spiral type
- strutting piece
- type conductor
- frequency band
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Abstract
一种移动通信单元的双频带天线，其具有由绝缘材料制成的支撑件、第一和第二螺旋型导体、连接到各螺旋型导体的一端的同轴馈线，该第一和第二螺旋型导体缠绕在支撑件上并彼此分离且各自具有不同的谐振频率；当电压通过同轴馈线提供给第一和第二螺旋型导体时，该天线在两个频带具有最佳的工作性能；其结果使得该单元可以使用所需的不同移动电信服务而不用更换。此外，该具创造性的天线设计的尺寸较小以便应用在移动电信单元中。
A dual-band antenna for a mobile communication unit having a support made of insulating material, first and second helical conductors, a coaxial feeder connected to one end of each helical conductor, the first and second helical Type conductors are wound on the support and separated from each other and each has a different resonant frequency; when the voltage is supplied to the first and second helical type conductors through the coaxial feeder, the antenna has the best working performance in two frequency bands; its The result is that the unit can be used with different mobile telecommunication services as required without replacement. Furthermore, the inventive antenna design is small in size for application in mobile telecommunication units.
Description
The present invention relates to a kind of the transmission and the antenna of received RF signal, particularly a kind of can be at the double frequency band aerial of the mobile communication unit of double frequency-band work.
Today, provide and providing multiple gyp mobile communication service in the worldwide.Though some in these mobile communication services are used same frequency band by adopting independent modulating system, but major part service such as cellular system in these mobile communication services all use different frequency bands usually to each other with PCS Personal Communications System (PCS), and for example cellular system and PCS Personal Communications System (PCS) are used 824 to 894MHz and 1.75 to 1.87GHz frequency band respectively.
The most widely used is a kind of retractable antenna, and in this antenna, a unipole antenna and a helical antenna combine togather, and this retractable antenna is installed in the top of mobile telephone unit in contractile mode.
When this retractable antenna when mobile unit stretches out, this unipole antenna is worked independently or is worked to send and to receive the signal of required frequency band with this helical antenna.When this retractable antenna is contracted in this mobile unit, has only helical antenna in work.
This retractable antenna is suitable for only working in a frequency band, and is not suitable for being operated in the different mobile communication services that keep required radiating pattern in the different frequency bands simultaneously in two or more its each telecommunications service.Its reason is: first, because the bandwidth between cellular system and the PCS is greatly about about 1GHz, so, must realize that one makes the match circuit of the complexity that partial-band and all frequency bands are complementary in order to make antenna might be operated on cellular system and two frequency bands of PCS; The second, because the centre frequency of a mobile communication frequency band is not the integral multiple of harmonic wave of the centre frequency of other mobile communication frequency bands, therefore be difficult to use an antenna for two different frequency bands; The 3rd, even if can being mated, an antenna is used for two or more frequency bands, also often be difficult to make antenna on each frequency band, to realize required radiating pattern.In other words, in order to obtain the service of mobile communication, the user need have the mobile telephone unit for the concrete frequency band design of its mobile telephone unit.
Therefore, in order to solve such problem, need a kind of building block that can be used in the mobile telephone unit of use in the mobile communication service that is operated on the different frequency bands and constitute this unit.
A kind of traditional double frequency-band helical antenna that is operated on two frequency bands has been shown among Fig. 1.As shown in FIG., this double frequency-band helical antenna comprises: by the strutting piece 120 that insulating material is made, be wrapped in top 100 and bottom 110 coil 130 and 140 to form two helical antennas of strutting piece 120 respectively.This helical antenna is designed to have different resonance frequencys respectively.In addition, the inside of this strutting piece 120 has the cable of concentric conductor.In the case, being wrapped in the length of two winding numbers on the helical antenna and each coil and the distance between the coil on the helical antenna etc. is different each other, thereby each helical antenna has different resonance frequencys.
Therefore, when providing a voltage by the cable with concentric conductor in the strutting piece 120, two helical antennas produce resonance respectively on different frequency bands.
Yet, the defective of above-mentioned antenna is: because helical antenna is divided into the upper and lower of strutting piece, therefore this helical antenna volume is quite huge, and occupied very big space in this mobile telephone unit, thereby hindered the current mobile phone size that reduces day by day so that phone is more and more lighter and handier, more and more Ling Min designing requirement.
The object of the present invention is to provide a kind of double frequency band aerial that is used for mobile communication unit that can on two frequency bands, work.
Another object of the present invention is to provide a kind of double frequency band aerial that is used for the less mobile comm unit of size.
The double frequency band aerial that is used for mobile comm unit according to one aspect of the present invention provided comprises: the strutting piece of being made by insulating material; The first spiral type conductor that is wrapped on this strutting piece and has first resonance frequency; The second spiral type conductor that is wrapped on this strutting piece and has second resonance frequency, this second spiral type conductor conductor and the first spiral type free of conductors; Be connected an end of each spiral type conductor and the coaxial feeder of a voltage is provided.
Above-mentioned purpose of the present invention and characteristics will be in conjunction with the drawings become more and more clearer to the description of following preferred embodiment, wherein:
Fig. 1 is the cross-sectional view of conventional dual band antenna;
Fig. 2 A and 2B are the cross-sectional views according to the double frequency band aerial that is used for mobile communication unit of first embodiment of the invention;
Fig. 3 A and 3B are the cross-sectional views according to the double frequency band aerial that is used for mobile communication unit of second embodiment of the invention;
Fig. 4 A and 4B are the cross-sectional views according to the double frequency band aerial that is used for mobile communication unit of third embodiment of the invention;
Fig. 5 A and 5B are the cross-sectional views according to the double frequency band aerial that is used for mobile communication unit of fourth embodiment of the invention;
Fig. 6 is the indicatrix of the creative antenna of mobile communication unit; With
Fig. 7 A and 7B are the radiating patterns of the creative antenna of mobile communication unit.
Fig. 2 A and 2B illustrate the double frequency band aerial of mobile communication unit of the present invention.As shown in the figure, the double frequency band aerial that this is creative comprises: the strutting piece of being made by insulating material 15, the first and second spiral type conductors 11 and 13 and coaxial feeder 20.
This first and second spiral types conductor 11 and 13 is wrapped on the strutting piece 15, and has first resonance frequency and second resonance frequency respectively.This spiral type conductor 11 separates to each other with 13.
This coaxial feeder 20 is connected an end of each spiral type conductor 11 and 13 to provide voltage to this end.In addition, the other end of the first spiral type conductor 11 is connected to the first feeder line distribution center 21, and the other end of the second spiral type conductor 13 is connected to the second feeder line distribution center 23.
Therefore, spiral type conductor 11 shown in Fig. 2 A and 13 length and the difference conference in the winding number cause the difference of its resonance frequency corresponding also big, otherwise the length of spiral type conductor 11 and 13 and the little meeting of the difference in the winding number cause the difference of its resonance frequency corresponding also little, shown in Fig. 2 B.
So, if will produce the antenna that on two different frequency bands, to work, the length of each spiral type conductor and winding number will be designed at corresponding frequencies place resonance separately, and if will make the antenna of being produced be operated on the frequency band, then the length of each spiral type conductor and winding number should be designed to equate basically to each other.
In addition, according to making spiral type conductor 11 and 13 dielectric constant, adjust the length and the winding number of each spiral type conductor at the employed strutting piece 15 of different frequency bands generation resonance.
The voltage that match circuit (not shown) by aforesaid antenna offers coaxial feeder 20 is provided for connected spiral type conductor, thereby makes the spiral type conductor produce resonance at the different frequency place.
Preferably as shown in Figure 6, comprise that this creative antenna of above-mentioned spiral type conductor 11 and 13 can be worked in two different frequency bands, thereby enlarged frequency bandwidth, consequently, use f here in the return loss value at each self-resonant frequency place
HAnd f
LExpression becomes minimum.Certainly, the present invention can obtain by utilizing two coils to be wrapped on the strutting piece of being made by insulating material with equidirectional, also can obtain by utilizing two coils in air, to twine with equidirectional, or by utilizing the metallic pattern on insulator, the ceramic body etc. to form as two coils.
Fig. 3 A and 3B show the double frequency band aerial according to second embodiment of the invention.Except the identical feeder distribution center 25 of coaxial feeder 20 is used to make each spiral type conductor 11 and an end of 13 to be connected thereby voltage can offer on two spiral type conductors by identical feeder distribution center 25 at its place, this embodiment and above-mentioned first embodiment are similar.
In the present embodiment, the CURRENT DISTRIBUTION between the spiral type conductor 11 and 13 has little differing, and has therefore prevented the antenna performance reduction.
Referring to Fig. 4, Fig. 4 shows the double frequency band aerial of third embodiment of the invention.Among the figure with above-mentioned first embodiment in similarly parts meet with identical reference and represent.As shown in FIG., one double frequency band aerial comprises that made by insulating material and its inside is the strutting piece 15 of hollow, one is installed in the coaxial feeder 20 of the upper end of unit 40, be fixed on the helical antenna 10 on the coaxial feeder 20, and place the whiplike or unipole antenna in the hollow space of helical antenna 10 in extendible and mode that can put.
Metal threaded part 22 with internal thread shape is fixed on the top of unit 40, and conducting ring 24 is wrapped on the threaded portion 22 and by feeder line connector 43 and is connected to match circuit 41.
Helical antenna 10 comprises: the first spiral type conductor 11 that is wrapped on the strutting piece 15 and has first resonance frequency, with the second spiral type conductor 13 that is wrapped on the strutting piece 15 and has second resonance frequency, this second spiral type conductor and the first spiral type free of conductors are provided with.Protective cover 17 is fixed on the unit 40, with the appearance of protection spiral type conductor 11 and 13.
The upper end that spiral type conductor 11 and each bottom of 13 are fixed to threaded portion 22 to be being fixedly connected to the described different separately feeder line distribution center as first embodiment, or is connected to described in a second embodiment same feeder line distribution center.
Whip antenna 30 is a kind of metal unipole antennas, and its upper end has a whip antenna cover 31 and its lower end has a metal current feed terminal 33, and this whip antenna 30 is subjected to the protection of a containment vessel.In addition, the installation of this whip antenna 30 is with the extendible and mode that can the put hollow bulb through strutting piece 15.Basically, the length of whip antenna 30 is the integral multiple of λ/8 substantially, but this length can change according to the design needs.
When whip antenna 30 runs through the hollow space of helical antenna 10 and extends to unit 40 outside, shown in Fig. 4 A, this current feed terminal 33 that is formed on these whip antenna 30 bottoms inserts in the threaded portion 22 of this coaxial feeder 20, and contacts with this threaded portion 22.Like this, in turn, the voltage of exporting from match circuit 41 offers current feed terminal 33 by feeder line connector 43, conducting ring 24 and threaded portion 22, finishes the energy feeding of whip antenna 30.At this moment, always helical antenna 10 remains on the energy feeding state no matter the work of whip antenna 30, this is because the spiral type conductor 11 and 13 of helical antenna 10 is fixed on the coaxial feeder 20, allow helical antenna 10 to be operated in two frequency bands, thereby allow telecommunications service to use two different frequency bands.
On the contrary, insert the hollow space of helical antenna 10 when whip antenna 30, when thereby 40 inside put in the unit, shown in Fig. 4 B, the current feed terminal 33 that is formed on the bottom of whip antenna 30 separates with the threaded portion 22 of coaxial feeder 20, be not electrically connected, make not offer current feed terminal 33 from the voltage of match circuit 41 outputs with coaxial feeder 20.This causes having only helical antenna 10 in work.In addition, a cover that is formed on whip antenna 30 tops is stopped by the protective cover 17 of helical antenna 10, thereby has prevented the inside that whip antenna 30 inserts unit 40.
With reference to shown in Figure 5, shown in the figure according to the double frequency band aerial of fourth embodiment of the invention.Among the figure with above-mentioned first embodiment in similarly parts meet with identical reference and represent.As shown in FIG., one double frequency band aerial comprises a strutting piece 15 of being made by insulating material, one is installed in the coaxial feeder 20 on the top of unit 40, place the whiplike or unipole antenna 30 in the threaded portion 22 of coaxial feeder 20 in extendible and mode that can put, and a helical antenna 10 that places the top of whip antenna 30.
The similar of coaxial feeder 20, whip antenna 30 and helical antenna 10, is no longer further inquired into it for fear of the description of redundancy here in the third embodiment of the present invention.
The top of whip antenna 30 has one makes helical antenna 10 be connected to the Elecrical connector 35 of whip antenna 30.The connecting terminal 19 that is used for energy feeding is formed on the bottom of protective cover 17 of helical antenna 10 so that spiral type conductor 11 and 13 is fixed on the bottom of the protective cover 17 of helical antenna 10.Though as shown in Figure 5, the strutting piece 15 of this helical antenna 10 does not have hollow space,, it also can have a hollow space as the 3rd embodiment is described.
When the threaded portion 22 of whip antenna 30 by coaxial feeder 20 extends to unit 40 outside, shown in Fig. 5 A, the current feed terminal 33 that is formed on whip antenna 30 lower ends is inserted in the threaded portion 22 of coaxial feeder 20, thereby contacts with the threaded portion 22 of coaxial feeder 20.Therefore, the voltage of exporting from match circuit 41 offers line feed terminals 33 through feeder line connector 43, conducting ring 24 and threaded portion 22, thereby finishes the energy feeding of whip antenna 30.In addition, the voltage that offers whip antenna 30 offers helical antenna 10 through connector 35 and connecting terminal 19, thereby realizes the energy feeding of helical antenna 10, makes whip antenna 30 and helical antenna 10 carry out work at synchronization.
On the contrary, when whip antenna 30 inserts in the threaded portion 22 of coaxial feeders 20, thereby in the unit when 40 inside put, shown in Fig. 5 B, the current feed terminal 33 that is formed on the bottom of whip antenna 30 separates with the threaded portion 22 of coaxial feeder 20, is not electrically connected with coaxial feeder 20.Consequently; the protective cover 17 that is formed on the helical antenna 10 at whip antenna 30 tops contacts with coaxial feeder 20 in being formed on unit 40; thereby make to offer helical antenna 10 through feed connector 43, conducting ring 24 and the threaded portion 22 and the connecting terminal 19 that are formed on protective cover 17 bottoms, and offer whip antenna 30 through Elecrical connector 35 from the voltage of match circuit 41 outputs.Its result makes helical antenna 10 and whip antenna 30 can be operated in spiral type conductor 10 and 30 and produces in the state of resonance at desired corresponding frequencies place respectively, thereby sends and receive each radiofrequency signal at different frequency bands.
The connecting terminal 19 that is preferably formed in protective cover 17 bottoms is made by non-conducting material, so that helical antenna 10 electric insulations, or this connecting terminal is to be made of the assembly with capacitive component, to realize the energy feeding of helical antenna 10 by coupling.
For example under the mobile communication commercialization, in order in cellular system and PCS, to use, this spiral type conductor 11 and 13 can utilize the data in the following table 1 to produce, these first spiral type conductor, 11 resonance are to the cellular system frequency of 850MHz, and the second spiral type conductor, 13 resonance are to the frequency of the PCS of 1.8GHz.
Table 1
| Frequency | Radius | Winding number | Highly | |
| The first spiral type conductor | 850MHz | 2.5mm | 10 | 11.6mm |
| The second spiral type conductor | 1.8GHz | 2.5mm | 7.7 | 9.0mm |
In table 1, spiral type conductor 11 and 13 is that the copper cash of 0.4mm is made by diameter.The helical antenna that utilizes in the table 1 value announced to make is installed in one to have on the hexahedral unit of quadrature of 120mm (highly) * 50mm (width) * 20mm (length).In addition, this unit is made by aluminum, and utilizes the cable with concentric conductor to realize energy feeding.
The radiation feature of aforesaid helical antenna is shown in Fig. 7 A and 7B.Since client's position for the base station be not usually fixing in one direction, so antenna omnidirectional preferably.Yet, can not obtain in three dimensions, having the antenna of isotropic radiating pattern.So the radiating pattern of the antenna in the three dimensions is designed to have the radiation feature of an annular.
The radiating pattern that the helical antenna of making from the value of utilizing table 1 to announce obtains, shown in Fig. 7 A and 7B, these values are to simulate by the HFSS that uses the IE3D that produced by Zeland and HP to obtain.
When 850MHz frequency place, the radiation feature of creative helical antenna is rendered as a butterfly-shaped form, and shown in Fig. 7 A, when 1.8GHz frequency place, situation is similar, shown in Fig. 7 B.Therefore, utilize two spiral type conductors that have different length respectively, the antenna that can work and have an optimum performance in two frequency bands can be provided.
As mentioned above,, but kept performance, therefore can quicken the miniaturization of mobile communication unit because this creative double frequency band aerial size is little.
In addition, utilize double frequency band aerial of the present invention, the client can use more than a kind of mobile communication service, and need not change mobile telephone unit.
Although the present invention describes with reference to relevant preferred embodiment, it should be appreciated by those skilled in the art, under the situation of the spirit and scope of the present invention that do not break away from following claim qualification, can carry out various improvement and change to the present invention.
Claims (3)
1, a kind of double frequency band aerial that is used for mobile communication unit comprises:
The strutting piece of making by insulating material, and this strutting piece has a hollow space in heart place therein;
First antenna, this first antenna comprises and is wrapped on this strutting piece and has the first spiral type conductor of first resonance frequency and the second spiral type conductor that is wrapped on this strutting piece and has second resonance frequency, this second spiral type conductor and this first spiral type free of conductors, and this first and second spiral types conductor is wrapped on this strutting piece with equidirectional;
Second antenna is installed in the hollow space of this strutting piece can extract out with collapsible mode, and has a current feed terminal in the bottom of this second antenna; With
Coaxial feeder is used for providing voltage to an end of connected each spiral type conductor, and provides this voltage to this current feed terminal when this second antenna is drawn out of.
2, a kind of double frequency band aerial that is used for mobile communication unit comprises:
The strutting piece of making by insulating material;
First antenna, this first antenna comprises and is wrapped on this strutting piece and has the first spiral type conductor of first resonance frequency and the second spiral type conductor that is wrapped on this strutting piece and has second resonance frequency, this second spiral type conductor and this first spiral type free of conductors, and this first and second spiral types conductor is wrapped on this strutting piece with equidirectional;
Second antenna is installed in the described unit can extract out with collapsible mode, and is provided with an Elecrical connector on the top of this second antenna, has a current feed terminal in its underpart, and wherein this strutting piece and this first antenna are installed in the top of this Elecrical connector;
Coaxial feeder is installed in the top of described unit, is used for providing voltage to first and second antennas; With
Connecting terminal is formed on the bottom of this strutting piece, and wherein this first spiral type conductor and this second spiral type conductor are fixed on this connecting terminal.
3, double frequency band aerial as claimed in claim 2, wherein, this voltage is applied to this first antenna and is applied to this second antenna by this Elecrical connector by this connecting terminal when this second antenna is retracted; This voltage is applied to this first antenna and is applied to this second antenna by this current feed terminal by this Elecrical connector and this connecting terminal when this second antenna is drawn out of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991249771A CN1298079C (en) | 1999-12-23 | 1999-12-23 | Double frequency band antenna for mobile communication unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991249771A CN1298079C (en) | 1999-12-23 | 1999-12-23 | Double frequency band antenna for mobile communication unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1301056A CN1301056A (en) | 2001-06-27 |
| CN1298079C true CN1298079C (en) | 2007-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991249771A Expired - Fee Related CN1298079C (en) | 1999-12-23 | 1999-12-23 | Double frequency band antenna for mobile communication unit |
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| Country | Link |
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| CN (1) | CN1298079C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868019B (en) * | 2012-09-29 | 2014-12-24 | 宝鸡烽火诺信科技有限公司 | U-shaped VHF (very high frequency) antenna of unmanned aerial vehicle |
| CN104124518B (en) * | 2014-07-18 | 2016-12-07 | 广州中海达卫星导航技术股份有限公司 | The antenna assembly of GNSS receiver |
| CN104538727A (en) * | 2014-12-22 | 2015-04-22 | 杨鹤鸣 | Dual-frequency-band spiral antenna and method for achieving dual-frequency-band work |
| CN106785397B (en) * | 2016-12-26 | 2023-09-15 | 歌尔科技有限公司 | Dual-band antenna and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996018220A1 (en) * | 1994-12-06 | 1996-06-13 | Deltec New Zealand Limited | A helical antenna |
| CN1146828A (en) * | 1995-02-07 | 1997-04-02 | 索尼公司 | Dual Band Antenna Set |
| WO1997018601A1 (en) * | 1995-11-15 | 1997-05-22 | Allgon Ab | Dual band antenna means |
| WO1997030489A1 (en) * | 1996-02-13 | 1997-08-21 | Allgon Ab | Dual band antenna means incorporating helical and elongated radiating structures |
| WO1999043042A1 (en) * | 1998-02-20 | 1999-08-26 | Samsung Electronics Co., Ltd. | Dual band antenna for radio terminal |
-
1999
- 1999-12-23 CN CNB991249771A patent/CN1298079C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996018220A1 (en) * | 1994-12-06 | 1996-06-13 | Deltec New Zealand Limited | A helical antenna |
| CN1146828A (en) * | 1995-02-07 | 1997-04-02 | 索尼公司 | Dual Band Antenna Set |
| WO1997018601A1 (en) * | 1995-11-15 | 1997-05-22 | Allgon Ab | Dual band antenna means |
| WO1997030489A1 (en) * | 1996-02-13 | 1997-08-21 | Allgon Ab | Dual band antenna means incorporating helical and elongated radiating structures |
| WO1999043042A1 (en) * | 1998-02-20 | 1999-08-26 | Samsung Electronics Co., Ltd. | Dual band antenna for radio terminal |
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| Publication number | Publication date |
|---|---|
| CN1301056A (en) | 2001-06-27 |
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Granted publication date: 20070131 Termination date: 20111223 |