CN201830246U - 3G (third generation telecommunication) mobile terminal antenna matching circuit - Google Patents
3G (third generation telecommunication) mobile terminal antenna matching circuit Download PDFInfo
- Publication number
- CN201830246U CN201830246U CN2010205696007U CN201020569600U CN201830246U CN 201830246 U CN201830246 U CN 201830246U CN 2010205696007 U CN2010205696007 U CN 2010205696007U CN 201020569600 U CN201020569600 U CN 201020569600U CN 201830246 U CN201830246 U CN 201830246U
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- antenna
- tuner
- matching circuit
- circuit
- matching
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Abstract
The utility model discloses a 3G (the third generation telecommunication) mobile terminal antenna matching circuit which is connected between an antenna and a tuner for matching with the antenna, and comprises a capacitor, an inductor and a variable capacitance diode, wherein two ends of the capacitor are connected with the antenna and the tuner respectively; one end of the inductor is connected with the contact between the capacitor and the antenna, and the other end is grounded; and a negative electrode of the variable capacitance diode is connected with the contact between the capacitor and the tuner, and a positive electrode is grounded. For the antenna matching circuit, a microprocessor divides the work frequency range of the antenna matching circuit into a plurality of sub-frequency ranges, control signals are output to an integrating circuit according to the work frequency of the tuner, the integrating circuit generates bias voltage according to the control signals and adjusts the work frequency of the antenna matching circuit to the sub-frequency ranges which belongs to the work frequency of the tuner. Compared with the prior art, through adjusting the matching parameters of the antenna matching circuit, matching capability of the antenna can be adjusted to be optimal, standing-wave ratio of the antenna can be effectively reduced and the radio frequency signal receiving capability of the antenna can be improved.
Description
Technical field
The utility model relates to a kind of 3G mobile terminal antenna match circuit.
Background technology
Existing mobile phones design integrated level is more and more higher, and volume is more and more littler, and it adopts built-in aerial mostly, and antenna only occupies very little space.Fast development along with wireless industry, the 3G mobile antenna problem will be more obvious, because the multifunctional intellectual mobile phone needs many antennas realize that sufficient bandwidth connects, to prevent to produce since human skin to 3G antenna element conductibility, and the meet accident problem of signal weakening of the 3G antenna that produces.
Need in 3G mobile, adopt antenna-matching circuit for this reason,, guarantee the energy that antenna receives, improve the signal receiving strength of 3G antenna by antenna is carried out impedance matching.Yet present 3G antenna-matching circuit, all be directly in needed whole frequency, to mate, so just can only can cause frequency range height two ends matching effect very poor like this, make the performance of whole system be subjected to very big influence with the center frequency range of whole frequency as the reference point.
The utility model content
For this reason, the purpose of this utility model is to provide a kind of 3G mobile terminal antenna match circuit, to realize that the antenna better matching is improved the ability of antenna receiving signal.
For achieving the above object, the utility model is mainly by the following technical solutions:
A kind of 3G mobile terminal antenna match circuit is connected between antenna and the tuner, and antenna is mated, and comprises electric capacity, inductance and variable capacitance diode, and described electric capacity two ends connect described antenna and tuner respectively; Described inductance one end connects the contact of described electric capacity and antenna, other end ground connection; Described variable capacitance diode negative pole connects the contact of electric capacity and tuner, plus earth.
Wherein said variable capacitance diode negative pole also is connected with a biasing dividing potential drop and produces circuit, and this biasing dividing potential drop produces circuit and comprises integrating circuit and microprocessor, and described integrating circuit is connected with tuner by microprocessor.
The utility model microprocessor is divided into the experimental process frequency range with the working frequency range of antenna-matching circuit, and export control signal according to the operating frequency of tuner and give above-mentioned integrating circuit, integrating circuit then produces bias voltage according to this control signal, and the operating frequency of antenna-matching circuit is adjusted in the frequency sub-band under the operating frequency of tuner.Compared with prior art, the utility model is adjusted to the best by adjusting the match parameter of antenna-matching circuit with the matching capacity of antenna, can effectively reduce the standing-wave ratio of antenna, improves the ability of antenna received RF signal.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
For setting forth thought of the present utility model and purpose, the utility model is described further below in conjunction with the drawings and specific embodiments.
See also shown in Figure 1ly, Fig. 1 is circuit theory diagrams of the present utility model.A kind of 3G mobile terminal antenna match circuit described in the utility model is connected between antenna and the tuner, and antenna is mated, and comprises electric capacity, inductance and variable capacitance diode, and described electric capacity two ends connect described antenna and tuner respectively; Described inductance one end connects the contact of described electric capacity and antenna, other end ground connection; Described variable capacitance diode negative pole connects the contact of electric capacity and tuner, plus earth.
Wherein microprocessor is divided into the experimental process frequency range with the working frequency range of antenna-matching circuit, and export control signal according to the operating frequency of tuner and give above-mentioned integrating circuit, integrating circuit then produces bias voltage according to this control signal, and the operating frequency of antenna-matching circuit is adjusted in the frequency sub-band under the operating frequency of tuner.
Change the value of appearance over the ground of antenna-matching circuit by the output voltage of control integrating circuit, thereby change the operating frequency of entire antenna match circuit, obtain the needed match parameter of antenna.
Wherein above-mentioned microprocessor, can store the operating frequency of antenna-matching circuit and the corresponding relation of bias voltage by a bias voltage memory, when tuner is worked in the wideband section, the centre frequency of each frequency sub-band as the operating frequency of antenna-matching circuit corresponding to each frequency sub-band, is stored in the form of the pairing bias voltage of the centre frequency of each frequency sub-band with the bias voltage table in the bias voltage memory in advance.
When the user selectes a certain channel, microprocessor is according to the operating frequency of tuner, search the bias voltage table and determine the pairing bias voltage of tuner operating frequency, and then export this bias voltage by integrating circuit and hold value adjustment, thereby realize the coupling of antenna-matching circuit and antenna.
Wherein the utility model antenna-matching circuit capacitor C 4 is a polarity free capacitor, and two ends connect antenna and tuner respectively, with the contact of antenna be a; With the contact of tuner be b; Inductance L 41, one end tie point a, other end ground connection; Variable capacitance diode D4, negative pole connects b point, plus earth.
Under the bias voltage effect that integrating circuit provided, by adjusting the appearance value of variable capacitance diode D4, and under the cooperation of capacitor C 4 and inductance L 41, the operating frequency of antenna-matching circuit is adjusted under the operating frequency of tuner in the frequency sub-band, finish coupling to antenna, integrating circuit tie point b, variable capacitance diode D4 is under the bias voltage effect of integrating circuit output, change appearance value over the ground by the appearance value that changes self, realize the coupling of antenna-matching circuit and antenna.
More than be that a kind of 3G mobile terminal antenna match circuit provided by the utility model is described in detail, used specific case herein structural principle of the present utility model and execution mode are set forth, above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (2)
1. a 3G mobile terminal antenna match circuit is connected between antenna and the tuner, and antenna is mated, and it is characterized in that comprising electric capacity, inductance and variable capacitance diode, and described electric capacity two ends connect described antenna and tuner respectively; Described inductance one end connects the contact of described electric capacity and antenna, other end ground connection; Described variable capacitance diode negative pole connects the contact of electric capacity and tuner, plus earth.
2. 3G mobile terminal antenna match circuit according to claim 1, it is characterized in that described variable capacitance diode negative pole also is connected with a biasing dividing potential drop and produces circuit, this biasing dividing potential drop produces circuit and comprises integrating circuit and microprocessor, and described integrating circuit is connected with tuner by microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205696007U CN201830246U (en) | 2010-10-19 | 2010-10-19 | 3G (third generation telecommunication) mobile terminal antenna matching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205696007U CN201830246U (en) | 2010-10-19 | 2010-10-19 | 3G (third generation telecommunication) mobile terminal antenna matching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201830246U true CN201830246U (en) | 2011-05-11 |
Family
ID=43968759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205696007U Expired - Fee Related CN201830246U (en) | 2010-10-19 | 2010-10-19 | 3G (third generation telecommunication) mobile terminal antenna matching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201830246U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465775A (en) * | 2017-06-30 | 2017-12-12 | 珠海格力电器股份有限公司 | Mobile terminal antenna device, mobile terminal rear shell and mobile terminal |
| CN108052852A (en) * | 2017-12-18 | 2018-05-18 | 天津科畅慧通信息技术有限公司 | A kind of match circuit of high frequency antenna |
-
2010
- 2010-10-19 CN CN2010205696007U patent/CN201830246U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465775A (en) * | 2017-06-30 | 2017-12-12 | 珠海格力电器股份有限公司 | Mobile terminal antenna device, mobile terminal rear shell and mobile terminal |
| CN108052852A (en) * | 2017-12-18 | 2018-05-18 | 天津科畅慧通信息技术有限公司 | A kind of match circuit of high frequency antenna |
| CN108052852B (en) * | 2017-12-18 | 2021-01-29 | 天津科畅慧通信息技术有限公司 | Matching circuit of high-frequency antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20121019 |