CN105738708B - A kind of shortwave antenna tuning coupler insert loss device and method - Google Patents
A kind of shortwave antenna tuning coupler insert loss device and method Download PDFInfo
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- CN105738708B CN105738708B CN201610209020.9A CN201610209020A CN105738708B CN 105738708 B CN105738708 B CN 105738708B CN 201610209020 A CN201610209020 A CN 201610209020A CN 105738708 B CN105738708 B CN 105738708B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
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Abstract
A kind of shortwave antenna tuning coupler insert loss device and method, device include actual transmission machine transmitting test cell, signal source and power amplifier transmitting test cell.Method and step：Actual transmission machine transmitting test cell is connected, output power of transmitter is monitored with feed-through type power meter, short-wave transmitter emits in frequency point f1 continuous waves, the voltage V1 received in f1 frequency points by power P 1 and short-wave receiving antenna that record feed-through type power meter is shown；Signal source and power amplifier transmitting test cell are connected, signal source working frequency points are set as f1, continuous wave transmitting, the voltage V2 received in f1 frequency points by power P 2 and short-wave receiving antenna that record feed-through type power meter is shown；Insertion loss IL of the calculating antenna tuner in working frequency points.The present invention converts to obtain the insertion loss of antenna using the reception value of actual antennas transmission power level when two kinds of different emission source transmittings and reception antenna, expansible to be applied to scale model electromagnetic compatibility test, improves measurement accuracy.
Description
Technical field
The invention belongs to antennas and EMC test field, and in particular to a kind of shortwave antenna tuning coupler insertion loss
Measuring device and method.
Background technology
In Shortwave Communication System, working band range reaches 10 frequencys multiplication, and the input impedance that antenna is presented is with signal frequency
The variation of rate and difference is huge, so caused by impedance mismatch huge loss will be caused to signal transmission, result even in hair
Penetrate not working or damaging for machine.
For transmitter, the impedance of output impedance, line characteristic impedance and antenna feed impedance three is same
One numerical value (i.e. impedance matching) is ideal.If impedance value is inconsistent, the point high-frequency energy by some quilt
It reflects, is formed and mismatch loss (also known as reflection loss).In general, the power output impedance of transmitter be fixed 50 Ω or
The characteristic impedance of 75 Ω, coaxial cable transmission line are also fixed 50 Ω or 75 Ω, and short-wave antenna then because of working frequency not
Different input impedance is presented together.Therefore antenna tuner must be used to keep the impedance matching between transmitter and antenna.
When antenna tuner is grounded technique not in place or internal fault, the untuned point that tuning precision is poor, occurs can be caused
Increase, or even tune phenomena such as not starting, directly influences the performance of short-wave radio set.
The insertion loss when the key technical indexes of antenna tuner works normally for it.
The insertion loss of general radio-frequency devices is realized using traditional double dynamometries, as shown in 1~Fig. 2 of attached drawing.However
Antenna tuner must be together used cooperatively with short-wave radio set, short-wave antenna, and the impedance of antenna is nor fixed resistance value, therefore
Traditional double dynamometries cannot achieve the insertion loss test of antenna tuner.
Invention content
The problem to be solved in the present invention is, for deficiencies of the prior art, to provide a kind of short-wave antenna tuning
Device insert loss device and method realizes the measurement of shortwave antenna tuning coupler insertion loss, expansible to be applied to contracting ratio
Model electromagnetic compatibility test improves measurement accuracy.
The present invention to solve above-mentioned technical problem the technical solution adopted is that：
A kind of shortwave antenna tuning coupler insert loss device, including actual transmission machine transmitting test cell, signal source
Emit test cell with power amplifier, the actual transmission machine transmitting test cell includes short-wave transmitter, by formula power
Meter, antenna harmony device, short wavelength emissions antenna, short-wave receiving antenna and spectrum analyzer, short-wave transmitter are coaxial by first
The input terminal of cable and feed-through type power meter connects, and the output end of feed-through type power meter connects antenna tuning by short connecting line
Device, antenna tuner are connect by cable with short wavelength emissions antenna, short-wave receiving antenna be placed on apart from short wavelength emissions antenna compared with
The output of some remote void spaces, reception antenna connects spectrum analyzer；The signal source and power amplifier transmitting test
Unit includes signal source, power amplifier, feed-through type power meter, short wavelength emissions antenna, short-wave receiving antenna and spectrum analysis
The output of instrument, signal source is connected by the input terminal of the second coaxial cable and power amplifier, and the output end of power amplifier is logical
The first coaxial cable connection feed-through type power meter is crossed, the output of feed-through type power meter connects short wavelength emissions day by short connecting line
The position of line, short-wave receiving antenna remains unchanged and (is placed on some void spaces farther out apart from short wavelength emissions antenna), receives
The output of antenna connects spectrum analyzer.
The present invention also provides a kind of measurement methods of above-mentioned shortwave antenna tuning coupler insert loss device, including such as
Lower step：
S1, actual transmission machine transmitting test cell being connected, short-wave transmitter emits in working frequency points f1 continuous wave modes,
Record feed-through type power meter show by 1 (unit of power P：W) (the i.e. output work of feed-through type power meter monitoring transmitter
Rate), it is received using short-wave receiving antenna, for record short-wave transmitter when working frequency points f1 emits, short-wave receiving antenna is in f1 frequencies
Voltage V1 (the units that point receives：dBuV)；
S2, signal source and power amplifier transmitting test cell are connected, is passed through using signal source, power amplifier connection
The output of formula power meter, feed-through type power meter connects short wavelength emissions antenna, and signal source working frequency points are set as f1, continuous wave hair
Penetrate, record feed-through type power meter show by 2 (unit of power P：) and the voltage V2 that is received in f1 frequency points of short-wave receiving antenna W
(unit：dBuV)；
S3, calculate antenna tuner working frequency points f1 insertion loss IL：
Beneficial effects of the present invention are：
1, it is based on Principle of Antenna, using actual antennas transmission power level when two kinds of different emission sources transmittings and reception antenna
Reception value converts to obtain the insertion loss of antenna, realizes the measurement of shortwave antenna tuning coupler insertion loss, is antenna tuner
Status assessment provide support；
2, it solves the problems, such as that shortwave antenna tuning coupler performance can not test for a long time, can be shortwave antenna tuning coupler
Working state evaluation provides support, expansible to be applied to scale model electromagnetic compatibility test, improves measurement accuracy.
Description of the drawings
Fig. 1 is the calibration structure schematic diagram of the double dynamometries of the prior art；
Fig. 2 is the measurement structural representation of the double dynamometries of the prior art；
Fig. 3 is the test configurations figure when present invention is emitted using actual transmission machine；
Fig. 4 is the test configurations figure when present invention is emitted using signal source and power amplifier.
Specific implementation mode
With reference to embodiment and attached drawing, the invention will be further described.
As shown in figure 3, short-wave transmitter is connected by the input terminal of the first coaxial cable and feed-through type power meter, pass through formula
The output end of power meter connects antenna tuner by short connecting line, and antenna tuner is connected by cable and short wavelength emissions antenna
It connects, short-wave receiving antenna is placed on some void spaces apart from short wavelength emissions antenna farther out, the output connection frequency of reception antenna
Spectrum analysis instrument.
Short-wave transmitter is in working frequency points f1Continuous wave mode emits after tuning, and what record feed-through type power meter was shown passes through
Power P1(unit：W) and spectrum analyzer is in working frequency points (frequency) f1Amplitude V1(unit：dBuV).
Short wavelength emissions electromechanical source is closed, the cable between antenna tuner and short wavelength emissions antenna is disconnected.
As shown in figure 4, the output end of signal source is connected by the input terminal of the second coaxial cable and power amplifier, power
The output end of amplifier is connected by the input terminal of the first coaxial cable and feed-through type power meter, the output end of feed-through type power meter
Short wavelength emissions antenna is connected by short connecting line, the position of short-wave receiving antenna, which remains unchanged, (to be placed on apart from short wavelength emissions
Some void spaces of antenna farther out), the output of reception antenna connects spectrum analyzer.
The working frequency points of signal source are set as f1, continuous wave transmitting, record feed-through type power meter show passes through power P2
(unit：W) and spectrum analyzer is in working frequency points (frequency) f1Amplitude V2(unit：dBuV).
It is fixed in short wavelength emissions antenna, short-wave receiving antenna position according to Principle of Antenna, and spacing meets far field condition
When, square of field strength of the power proportional at short-wave receiving antenna of short wavelength emissions antenna transmitting.
Assuming that short-wave transmitter f1When frequency point emits, the actual emanations power of short wavelength emissions antenna is P3, short-wave receiving antenna
The field strength at place is E1(unit：V/m)；Signal source and power amplifier are in working frequency points f1When transmitting, the field at short-wave receiving antenna
It is E by force2(unit：V/m), then have：
It is assumed that short-wave receiving antenna is in f1The antenna factor of frequency point is K (units：DB/m), then short-wave transmitter, signal source
With power amplifier in working frequency points f1When emitting respectively, the field strength at short-wave receiving antenna is respectively：
Therefore, the actual emission power P of Fig. 3 intermediate waves antenna3：
Antenna tuner is in working frequency points f1Insertion loss IL be：
It should be understood that above-described embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it should also be understood that,
After reading the content taught by the present invention, those skilled in the art can make various modifications or changes to the present invention, without
The spirit and scope of technical solution of the present invention are detached from, should all be covered in scope of the presently claimed invention.
Claims (1)
1. a kind of measurement method of shortwave antenna tuning coupler insert loss device, measuring device includes the transmitting of actual transmission machine
Test cell, signal source and power amplifier emit test cell, and the actual transmission machine transmitting test cell includes shortwave hair
Penetrate machine, feed-through type power meter, antenna harmony device, short wavelength emissions antenna, short-wave receiving antenna and spectrum analyzer, short wavelength emissions
Machine is connected by the input terminal of the first coaxial cable and feed-through type power meter, and the output end of feed-through type power meter passes through short connection
Line connects antenna tuner, and antenna tuner is connect by cable with short wavelength emissions antenna, and short-wave receiving antenna is placed on distance
The output of some void spaces of short wavelength emissions antenna farther out, reception antenna connects spectrum analyzer；The signal source and power
It includes signal source, power amplifier, feed-through type power meter, short wavelength emissions antenna, short-wave reception day that amplifier, which emits test cell,
The output of line and spectrum analyzer, signal source is connected by the input terminal of the second coaxial cable and power amplifier, and power is put
The output end of big device connects feed-through type power meter by the first coaxial cable, and the output of feed-through type power meter passes through short connecting line
Short wavelength emissions antenna is connected, the position of short-wave receiving antenna remains unchanged, and the output of reception antenna connects spectrum analyzer, special
Sign is, includes the following steps：
S1, actual transmission machine transmitting test cell is connected, short-wave transmitter emits in working frequency points f1 continuous wave modes, records
Feed-through type power meter show by power P 1, received using short-wave receiving antenna, record short-wave transmitter in working frequency points f1
When transmitting, voltage V1 that short-wave receiving antenna is received in f1 frequency points；
S2, signal source and power amplifier transmitting test cell are connected, formula work(is passed through using signal source, power amplifier connection
The output of rate meter, feed-through type power meter connects short wavelength emissions antenna, and signal source working frequency points are set as f1, continuous wave transmitting, note
The voltage V2 received in f1 frequency points by power P 2 and short-wave receiving antenna that record feed-through type power meter is shown；
S3, calculate antenna tuner working frequency points f1 insertion loss IL：
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974347B (en) * | 2016-07-22 | 2019-01-25 | 北京润科通用技术有限公司 | A kind of calibration method and system of test macro |
| CN106911401B (en) * | 2017-02-21 | 2020-07-07 | 熊猫电子集团有限公司 | Short wave antenna tuner insertion loss test method and clamp |
| CN108646097A (en) * | 2018-04-24 | 2018-10-12 | 四川斐讯信息技术有限公司 | A kind of insertion loss test method and system |
| CN109342842A (en) * | 2018-08-31 | 2019-02-15 | 北京北广科技股份有限公司 | A kind of fault detection method of antenna tuner |
| CN109581080B (en) * | 2018-12-21 | 2022-03-25 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Aerial test equipment for evaluating short wave antenna performance |
| CN110470973B (en) * | 2019-08-05 | 2021-09-14 | 浙江铖昌科技股份有限公司 | Automatic on-chip test system for noise coefficient of low-noise amplifier chip |
| CN111246368A (en) * | 2020-01-08 | 2020-06-05 | 青岛恒天翼信息科技有限公司 | Method for realizing short-wave communication |
| CN114280381A (en) * | 2021-12-13 | 2022-04-05 | 中国航空工业集团公司洛阳电光设备研究所 | On-site calibration method for antenna coefficient of radiation emission test antenna |
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