CN104485900A - Antenna impedance matching method on basis of key index data of power amplifier - Google Patents
Antenna impedance matching method on basis of key index data of power amplifier Download PDFInfo
- Publication number
- CN104485900A CN104485900A CN201410697042.5A CN201410697042A CN104485900A CN 104485900 A CN104485900 A CN 104485900A CN 201410697042 A CN201410697042 A CN 201410697042A CN 104485900 A CN104485900 A CN 104485900A
- Authority
- CN
- China
- Prior art keywords
- impedance matching
- antenna
- matching network
- power amplifier
- key index
- 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.)
- Pending
Links
Landscapes
- Transmitters (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses an antenna impedance matching method on the basis of key index data of a power amplifier. The method mainly comprises the steps of calibrating a vector network analyzer; measuring output impedance value of an antenna; acquiring an impedance matching network value through Smith-Chart software; creating an impedance matching network; acquiring testing data of the created impedance matching network; verifying whether the testing data meet the index requirement; comparing the impedance matching network with the key index data of the power amplifier; determining whether the created impedance matching network reaches the optimal state; if not, debugging the impedance matching network; if so, passing the debugging. With the adoption of the antenna impedance matching method on the basis of the key index of the power amplifier, the accuracy can be ensured on the premise that an intuitive and physical conception is clear, thus the calculation speed is greatly raised, the performances of the antenna are optimized, and meanwhile, the shortages of computer simulation method and the manual calculation method are overcome, and as a result, the performances of the antenna are further optimized.
Description
Technical field
The present invention relates to impedance matching adjustment method, particularly a kind of antenna impedance matching method based on power amplifier key index data.
Background technology
Impedance matching refer to load impedance and signal source internal driving adaptive mutually, obtain a kind of operating state of maximum power output.Present impedance matching debugging has multiple method, but has respective drawback.Such as: computer emulation method and hand computation method.Because this kind of software of Computer Simulation is for difference in functionality designs and just for impedance matching, so use more complicated.Designer must be familiar with inputting numerous data with correct form, and designer also needs to have the technical ability finding useful data from a large amount of Output rusults.In addition, except non-computer is specially for this purposes manufactures, otherwise circuit simulating software can not be pre-installed on computers.Hand computation is a kind of extremely loaded down with trivial details method because need use longer computing formula and processed data mostly be plural number, only could use this method the worked people for many years of RF application.
Summary of the invention
For above-mentioned technical problem, the invention provides a kind of antenna impedance matching method based on power amplifier key index data, comprise the steps:
A, calibration vector network analyzer;
B, antenna to be connected with described vector network analyzer, to measure the impedance values of antenna;
C, use Smith-Chart software obtain impedance matching network value;
D, the described impedance matching network value establishment impedance matching network obtained according to step C;
E, by step D set up described impedance matching network be connected with the port one of described vector network analyzer, acquisition port one test data;
Whether the test data that F, determining step E obtain touches the mark requirements: if do not reach, then debug described impedance matching network, repetition step D to E; If reach, then the described impedance matching network set up by step D and power amplifier key index data contrast;
G, judge whether described impedance matching network reaches optimum state according to the result of described comparison: if do not reach, then repeat step D to F and debug described impedance matching network; If reach, then debugging is passed through;
Preferred version is: calibrated vector network analyzer by calibrating device.
Preferred version is: in stepb, and antenna is connected with vector network analyzer by radio-frequency (RF) coaxial line.
Preferred version is: described test data comprises reflection coefficient and voltage standing wave(VSW) ratio.
Preferred version is: described index request is specially: test data is in 400 ~ 1200 frequency ranges, and voltage standing wave ratio is all less than 3.5 and reflection coefficient is all less than-3dB.
Preferred version is: the impedance matching network described in step G reaches optimum state and refers to that the power of antenna reaches maximum.
Preferred version is: the impedance matching network value described in step C is capacitance or the inductance value of serial or parallel connection.
Preferred version is: the reflection coefficient that impedance matching network is measured and voltage standing wave(VSW) ratio is real-time synchronization display in computer and vector network analyzer, and supports directly to read.
The present invention uses Smith-Chart software and power amplifier key index data to coordinate and obtains impedance matching network value in impedance matching debugging, in debug process, smith-Chart software and power amplifier key index data coordinate uses computer calculate, set up to meet after the impedance matching network of index again with power amplifier key index Data Comparison, ensure antenna reach maximum power prerequisite under continue debugging impedance matching network, thus optimize the performance of antenna further, the present invention is directly perceived in guarantee, accuracy is also assures that under the prerequisite of clear physics conception, substantially increase computational speed, optimize the performance of antenna, overcome the drawback of computer emulation method and hand computation method simultaneously and optimize the performance of antenna further.
Accompanying drawing explanation
Fig. 1 is the flow chart of the impedance matching methods that the present invention proposes;
Fig. 2 is the Smith circle diagram of the embodiment of the present invention;
Fig. 3 is that the vector network analyzer of the embodiment of the present invention measures antenna parameter figure;
Fig. 4 is the power amplifier key index datagram of the embodiment of the present invention.
Embodiment
The present invention only needs to test out the reflection coefficient S11 of port one and voltage standing wave(VSW) ratio by vector network analyzer and judges whether the impedance matching network set up touches the mark requirement.Reflection coefficient S11 represents return loss characteristic, generally by dB value and the impedance operator of its loss of vector network analyzer.The emission effciency of this Parametric Representation antenna, is worth larger, represents that the energy that antenna itself reflects is larger, the efficiency of such antenna is poorer, the impedance matching network S parameter that vector network analyzer is measured, comprising: when port 2 mates, the reflection coefficient S11 of port one; During port one coupling, the reflection coefficient S22 of port 2; During port one coupling, port 2 is to the voltage transmission coefficient S12 of port one; When port 2 mates, port one is to the voltage transmission coefficient S21 of port 2.
VSWR is voltage standing wave ratio, is generally called for short standing-wave ratio.Be used for weighing wireless signal by power source, transmission line, finally enter effective through-put power of load.Electromagnetic wave is transmitted to second medium from first medium, can be different due to medium, and electromagnetic energy is understood some and reflected, thus forms " moving standing wave " in first region.Voltage standing wave ratio, what refer to is exactly the voltage peak of moving standing wave and the ratio of voltage dips, and this value can by the magnitude calculation of reflection coefficient: VSWR=(1+ the amplitude of reflection coefficient)/(1-the amplitude of reflection coefficient).As from the foregoing, standing-wave ratio is larger, and reflection power is higher, and efficiency of transmission is lower.Consider from the angle of Energy Transfer, desirable VSWR is 1: 1, namely now for row ripple passes fast state, in transmission line, is called impedance matching, and time the poorest, VSWR is infinitely great, and now reflection coefficient mould is 1, is pure standing wave state, is called total reflection, does not have Energy Transfer.As from the foregoing, standing-wave ratio is larger, and reflection power is higher, and efficiency of transmission is lower.For an idealized system, transmitting energy is 100%, needs exact matching between the characteristic impedance of source impedance, transmission line and other connector, load impedance.Because desirable transmitting procedure does not exist interference, the alternating voltage of signal keeps identical at two ends.Reflection coefficient S11 and voltage standing wave(VSW) ratio is real-time synchronization display in computer and vector network analyzer, can directly read.
Power amplifier key index data are some the key index data below different loads situation, such as linearly, power, electric current and ACLR etc.
Below in conjunction with accompanying drawing, the present invention is described in further detail.As shown in Figure 1, the present invention includes following steps:
A, instruction according to calibrating device, calibrate vector network analyzer.Application calibrating device is calibrated vector network analyzer, the advantage such as to have accurately and fast, simple.When the port one voltage standing wave ratio of vector network analyzer is 1 ± 0.001 in all frequency ranges, calibrate complete;
B, antenna to be connected with described vector network analyzer by radio-frequency (RF) coaxial line, to measure the impedance values of antenna.Wherein, resistance value is plural form.It is low that radio-frequency (RF) coaxial line has mounting cost, and maintenance cost is low, installs simple, expand the features such as convenient;
C, use Smith-Chart software obtain n kind impedance matching network value, and described n kind impedance matching network value is capacitance or the inductance value of serial or parallel connection, n kind impedance matching network value corresponding n kind impedance matching network scheme, i.e. A1, A2 ... An;
D, the wherein a kind of impedance matching network value establishment impedance matching network scheme obtained according to step C, such as option A 1;
E, by step D set up described impedance matching network be connected with the port one of described vector network analyzer, acquisition port one test data.Port one test data comprises reflection coefficient and voltage standing wave(VSW) ratio.The real-time synchronization display in a computer of the reflection coefficient that impedance matching network is measured and voltage standing wave(VSW) ratio, can directly read;
The test data that F, determining step E obtain, if test data is not in 400 ~ 1200 frequency ranges, voltage standing wave ratio is all less than 3.5 and reflection coefficient is all less than the index request of-3dB, then again choose impedance matching network scheme, such as: choose impedance matching network option A 2, repeat step D to E, if test data voltage standing wave ratio in 400 ~ 1200 frequency ranges is all less than 3.5 and reflection coefficient is all less than the index request of-3dB, then the described impedance matching network set up by step D and power amplifier key index data contrast;
Whether G, the described impedance matching network set up according to the result determining step D of above-mentioned comparison meet antenna and reach maximum power, if the described impedance matching network that step D is set up does not meet antenna and reaches maximum power, then again choose impedance matching network scheme, such as: choose impedance matching network option A 3, namely step D to F is repeated; If the described impedance matching network that step D is set up meets antenna and reaches maximum power, then debugging is passed through.
Embodiment
Fig. 2 is the Smith circle diagram of the embodiment of the present invention, and Fig. 3 is the Parameter Map of the vector network analyzer measurement antenna of the present embodiment, and Fig. 4 is the power amplifier key index datagram of the embodiment of the present invention.The present embodiment design is under 824-849MHz PA operating frequency, debug according to step of the present invention, recording antenna output impedance value by vector network analyzer is: Z=(35.1-J47.5) Ω, the i.e. position of 1 in Fig. 2, impedance network value is obtained by Smith-Chart software, result is after shunt inductance 8.2nH, antenna output impedance is Z=(50.5+J49.7) Ω, that is: 2 positions in Fig. 2, by not reaching voltage standing wave ratio in 400 ~ 1200 frequency ranges after checking and be all less than 3.5 and reflection coefficient being all less than the index request of-3dB, repeat above-mentioned steps, result is after series capacitance 3.9pF, then antenna output impedance value is Z=(50.5+j0.2) Ω, that is: 3 positions in Fig. 2, by verifying that it meets voltage standing wave ratio in 400 ~ 1200 frequency ranges and is all less than the index request of 3.5.Then contrasted by the power amplifier key index datagram of Fig. 4, result is that antenna output impedance Z=(50.5+j0.2) Ω meets antenna and reaches maximum power, and debugging terminates.
Claims (8)
1. based on an antenna impedance matching method for power amplifier key index data, it is characterized in that, comprise the steps:
A, calibration vector network analyzer;
B, antenna to be connected with described vector network analyzer, to measure the impedance values of antenna;
C, use Smith-Chart software obtain impedance matching network value;
D, the described impedance matching network value establishment impedance matching network obtained according to step C;
E, by step D set up described impedance matching network be connected with the port one of described vector network analyzer, acquisition port one test data;
Whether the test data that F, determining step E obtain touches the mark requirements: if do not reach, then debug described impedance matching network, repetition step D to E; If reach, then the described impedance matching network set up by step D and power amplifier key index data contrast;
G, judge whether described impedance matching network reaches optimum state according to the result of described comparison: if do not reach, then repeat step D to F and debug described impedance matching network; If reach, then debugging is passed through.
2. method according to claim 1, is characterized in that, is calibrated vector network analyzer by calibrating device.
3. the antenna impedance matching method based on power amplifier key index data according to claim 1, is characterized in that, in stepb, antenna is connected with vector network analyzer by radio-frequency (RF) coaxial line.
4. the antenna impedance matching method based on power amplifier key index data according to claim 1, is characterized in that, described test data comprises reflection coefficient and voltage standing wave(VSW) ratio.
5. the antenna impedance matching method based on power amplifier key index data according to claim 4, it is characterized in that, described index request is specially: test data is in 400 ~ 1200 frequency ranges, and voltage standing wave ratio is all less than 3.5 and reflection coefficient is all less than-3dB.
6. the antenna impedance matching method based on power amplifier key index data according to claim 1, is characterized in that, the impedance matching network described in step G reaches optimum state and refers to that the power of antenna reaches maximum.
7. the antenna impedance matching method based on power amplifier key index data according to claim 1, is characterized in that, the impedance matching network value described in step C is capacitance or the inductance value of serial or parallel connection.
8. the antenna impedance matching method based on power amplifier key index data according to claim 4, it is characterized in that, the reflection coefficient that impedance matching network is measured and voltage standing wave(VSW) ratio is real-time synchronization display in computer and vector network analyzer, and supports directly to read.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410697042.5A CN104485900A (en) | 2014-11-27 | 2014-11-27 | Antenna impedance matching method on basis of key index data of power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410697042.5A CN104485900A (en) | 2014-11-27 | 2014-11-27 | Antenna impedance matching method on basis of key index data of power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104485900A true CN104485900A (en) | 2015-04-01 |
Family
ID=52760417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410697042.5A Pending CN104485900A (en) | 2014-11-27 | 2014-11-27 | Antenna impedance matching method on basis of key index data of power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104485900A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652091A (en) * | 2015-12-29 | 2016-06-08 | 重庆微标科技股份有限公司 | RFID product standing-wave ratio automatic testing system |
| CN106685448A (en) * | 2017-01-20 | 2017-05-17 | 江苏智联天地科技有限公司 | Cellphone radio-frequency front-end transmission link power consumption and ACLR optimal matching method |
| CN108681626A (en) * | 2018-04-24 | 2018-10-19 | 苏州大学 | A kind of method of quick adjusting plasma discharge impedance matching |
| WO2021031293A1 (en) * | 2019-08-16 | 2021-02-25 | 歌尔科技有限公司 | Monopole antenna bandwidth adjustment method and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098118A (en) * | 2011-01-06 | 2011-06-15 | 西安电子科技大学 | Impedance matching network debugging method |
| CN103645385A (en) * | 2013-11-13 | 2014-03-19 | 中国电子科技集团公司第四十一研究所 | S-parameter obtaining method based on embedded multi-port network matching circuit |
-
2014
- 2014-11-27 CN CN201410697042.5A patent/CN104485900A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098118A (en) * | 2011-01-06 | 2011-06-15 | 西安电子科技大学 | Impedance matching network debugging method |
| CN103645385A (en) * | 2013-11-13 | 2014-03-19 | 中国电子科技集团公司第四十一研究所 | S-parameter obtaining method based on embedded multi-port network matching circuit |
Non-Patent Citations (1)
| Title |
|---|
| 闫博: "《基于ADS的射频功率放大器设计与仿真》", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652091A (en) * | 2015-12-29 | 2016-06-08 | 重庆微标科技股份有限公司 | RFID product standing-wave ratio automatic testing system |
| CN105652091B (en) * | 2015-12-29 | 2018-12-04 | 重庆微标科技股份有限公司 | RFID product standing-wave ratio Auto-Test System |
| CN106685448A (en) * | 2017-01-20 | 2017-05-17 | 江苏智联天地科技有限公司 | Cellphone radio-frequency front-end transmission link power consumption and ACLR optimal matching method |
| CN108681626A (en) * | 2018-04-24 | 2018-10-19 | 苏州大学 | A kind of method of quick adjusting plasma discharge impedance matching |
| CN108681626B (en) * | 2018-04-24 | 2022-06-28 | 苏州大学 | Method for quickly adjusting plasma discharge impedance matching |
| WO2021031293A1 (en) * | 2019-08-16 | 2021-02-25 | 歌尔科技有限公司 | Monopole antenna bandwidth adjustment method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104378085A (en) | RF impedance matching debugging method | |
| CN104111435B (en) | A kind of test fixture error elimination method | |
| WO2021031424A1 (en) | Scattering parameter measurement method and device calibration method | |
| CN104270208B (en) | Method and device for detecting standing-wave ratio of RRU | |
| US20070073499A1 (en) | Method and apparatus for determining one or more s-parameters associated with a device under test (DUT) | |
| CN104485900A (en) | Antenna impedance matching method on basis of key index data of power amplifier | |
| CN102314532B (en) | IBIS (Input/Output Buffer Information Specification) model verification method and system | |
| CN107345986B (en) | Impedance testing method in de-embedding mode | |
| CN109444547B (en) | RFID chip impedance measuring method and device based on two-port network | |
| CN103995185A (en) | Method for carrying out insertion loss test through simple probe | |
| CN107370464A (en) | RF power amplification power compensating system and method | |
| CN110398678A (en) | A kind of wide impedance ranges test method of large power semiconductor device | |
| Sandler | Extending the usable range of the 2-port shunt through impedance measurement | |
| CN203643514U (en) | Coupling assembly and data measuring device of measuring scattering parameters | |
| EP2447724A1 (en) | Method for implementing electromagnetic anti-interference filter impedance match and measuring system thereof | |
| CN104614595A (en) | Noncontact testing method for inherent frequency and quality factor of resonance coil | |
| WO2017211023A1 (en) | Rapid confirmation method and device for antenna efficiency rf anechoic chamber test | |
| CN106896270A (en) | A kind of measuring method of transmission line impedance | |
| Dudkiewicz | Vector-receiver load pull measurements | |
| CN111209654A (en) | PDN frequency impedance test system and method | |
| CN102737145A (en) | Measurement-based modeling method by prediction on electromagnetic emission broadband behavioral level of electronic component | |
| CN105548707A (en) | Method and system for automatically measuring electromagnetic signal harmonic distortion | |
| CN104062510A (en) | Method for measuring insertion loss of feeder line switching between two distant ports and enabling measuring errors to be smaller | |
| US20220029719A1 (en) | Simulation Model Fitting for Radio Frequency Matching-Network Optimization | |
| US8056034B1 (en) | Use of smith chart to compensate for missing data on network performance at lower frequency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150401 |
|
| RJ01 | Rejection of invention patent application after publication |