CN105738708A - Short wave antenna tuner insertion loss measuring device and method - Google Patents

Short wave antenna tuner insertion loss measuring device and method Download PDF

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Publication number
CN105738708A
CN105738708A CN201610209020.9A CN201610209020A CN105738708A CN 105738708 A CN105738708 A CN 105738708A CN 201610209020 A CN201610209020 A CN 201610209020A CN 105738708 A CN105738708 A CN 105738708A
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antenna
short
signal source
feed
type power
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CN105738708B (en
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刘义
张凯
熊波
安孝玉
张炜
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China Ship Development and Design Centre
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China Ship Development and Design Centre
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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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  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

The invention relates to a short wave antenna tuner insertion loss measuring device and method. The device comprises an actual transmitter emission and test unit, a signal source and a power amplifier emission and test unit. The method includes the steps that: the actual transmitter emission and test unit is connected, an output power of a transmitter is monitored through a through type power meter, a short wave transmitter emits signals in a frequency point f1 in the constant amplitude, and a through power P1 displayed by the through type power meter and a voltage V1 received by a short wave receiving antenna in the f1 frequency point are recorded; the signal source and the power amplifier emission and test unit are connected, a work frequency point of the signal source is set as f1, and the signal source is set as continuous wave emission, and a through power P2 displayed by the through type power meter and a voltage V2 received by the short wave receiving antenna in the f1 frequency point are obtained; and an insertion loss IL of an antenna tuner in the work frequency point is calculated. According to the invention, the antenna insertion loss is obtained by conversion of an actual antenna emission power value and a receiving value of the receiving antenna when two different emission sources are adopted for emission. The short wave antenna tuner insertion los measuring device and method can be extensionally applied to a scaled model electromagnetic compatibility test, and the measuring precision is improved.

Description

A kind of shortwave antenna tuning coupler insert loss device and method
Technical field
The invention belongs to antenna and EMC test field, be specifically related to measurement apparatus and the method for a kind of shortwave antenna tuning coupler insertion loss.
Background technology
In Shortwave Communication System, working band ranges up to 10 frequencys multiplication, the input impedance that antenna presents with signal frequency change and difference is huge, the impedance mismatch so caused will to signal transmission cause huge loss, result even in not working or damaging of transmitter.
For transmitter, the impedance of its output impedance, line characteristic impedance and antenna feed impedance three is same numerical value (i.e. impedance matching) is ideal.If resistance value is inconsistent, some is reflected back by the high-frequency energy at this point, forms not match penalties (also known as reflection loss).Generally, the power output impedance of transmitter is 50 fixing Ω or 75 Ω, and the characteristic impedance of coaxial cable transmission line is also 50 fixing Ω or 75 Ω, and short-wave antenna then presents different input impedances because of the difference of operating frequency.Therefore antenna tuner must be adopted to keep the impedance matching between transmitter and antenna.
Antenna tuner ground connection technique is not in place or during internal fault, can cause that tuning precision untuned point poor, that occur increases, even tune the phenomenons such as not startup, directly influence the performance of short-wave radio set.
The key technical indexes of antenna tuner is insertion loss during its normal operation.
The insertion loss of general radio-frequency devices adopts traditional double; two dynamometries to realize, as shown in accompanying drawing 1～Fig. 2.But antenna tuner must with short-wave radio set, short-wave antenna together with the use of, and the impedance of antenna neither fixed resistance value, therefore traditional double; two dynamometries cannot realize antenna tuner insertion loss test.
Summary of the invention
The problem to be solved in the present invention is, for prior art above shortcomings, it is provided that a kind of shortwave antenna tuning coupler insert loss device and method, it is achieved that the measurement of shortwave antenna tuning coupler insertion loss, expansible it is applied to scale model electromagnetic compatibility test, improves certainty of measurement.
The present invention solves that above-mentioned technical problem the technical scheme is that
A kind of shortwave antenna tuning coupler insert loss device, test cell is launched including actual transmission machine, test cell launched by signal source and power amplifier, described actual transmission machine is launched test cell and is included short-wave transmitter, feed-through type power meter, antenna harmony device, short wavelength emissions antenna, short-wave receiving antenna and spectrum analyzer, short-wave transmitter is connected with the input of feed-through type power meter by the first coaxial cable, the outfan of feed-through type power meter connects antenna tuner by short connecting line, antenna tuner is connected with short wavelength emissions antenna by cable, short-wave receiving antenna is placed on distance short wavelength emissions antenna certain void spaces farther out, the output of reception antenna connects spectrum analyzer；Described signal source and power amplifier are launched test cell and are included signal source, power amplifier, feed-through type power meter, short wavelength emissions antenna, short-wave receiving antenna and spectrum analyzer, the output of signal source is connected with the input of power amplifier by the second coaxial cable, the outfan of power amplifier connects through formula energy meter by the first coaxial cable, the output of feed-through type power meter connects short wavelength emissions antenna by short connecting line, the position of short-wave receiving antenna remains unchanged (being placed on distance short wavelength emissions antenna certain void spaces farther out), the output of reception antenna connects spectrum analyzer.
Present invention also offers the measuring method of a kind of above-mentioned shortwave antenna tuning coupler insert loss device, comprise the steps:
S1, connect actual transmission machine launch test cell, short-wave transmitter is launched in working frequency points f1 continuous wave mode, record feed-through type power meter show by power P 1 (unit: W) (namely feed-through type power meter monitor transmitter output,), employing short-wave receiving antenna receives, record short-wave transmitter when working frequency points f1 launches, the voltage V1 (unit: dBuV) that short-wave receiving antenna receives at f1 frequency；
S2, connect signal source and power amplifier and launch test cell, signal source, power amplifier is adopted to connect through formula energy meter, the output of feed-through type power meter connects short wavelength emissions antenna, signal source working frequency points is set to f1, continuous wave is launched, the voltage V2 (unit: dBuV) received at f1 frequency by power P 2 (unit: W) and short-wave receiving antenna that record feed-through type power meter shows；
S3, calculating antenna tuner are at the insertion loss IL of working frequency points f1:
I L = P 1 P 2 × 10 V 2 - V 1 20 .
The invention have the benefit that
1, based on Principle of Antenna, when adopting two kinds of different emission sources to launch, the reception value conversion of actual antennas transmission power level and reception antenna obtains the insertion loss of antenna, achieving the measurement of shortwave antenna tuning coupler insertion loss, the state estimation for antenna tuner provides support；
2, solve the problem that shortwave antenna tuning coupler performance cannot be tested for a long time, can provide for the working state evaluation of shortwave antenna tuning coupler and support, expansible be applied to scale model electromagnetic compatibility test, improve certainty of measurement.
Accompanying drawing explanation
Fig. 1 is the calibration structure schematic diagram of the double; two dynamometry of prior art；
Fig. 2 is the measurement structure schematic diagram of the double; two dynamometry of prior art；
Fig. 3 is present invention test configurations figure when adopting actual transmission machine to launch；
Fig. 4 is present invention test configurations figure when adopting signal source and power amplifier to launch.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the invention will be further described.
As shown in Figure 3, short-wave transmitter is connected with the input of feed-through type power meter by the first coaxial cable, the outfan of feed-through type power meter connects antenna tuner by short connecting line, antenna tuner is connected with short wavelength emissions antenna by cable, short-wave receiving antenna is placed on distance short wavelength emissions antenna certain void spaces farther out, and the output of reception antenna connects spectrum analyzer.
Short-wave transmitter is at working frequency points f1After tuning, continuous wave mode is launched, and what record feed-through type power meter showed passes through power P1(unit: W) and spectrum analyzer are at working frequency points (frequency) f1Amplitude V1(unit: dBuV).
Close short wavelength emissions electromechanical source, disconnect the cable between antenna tuner and short wavelength emissions antenna.
As shown in Figure 4, the outfan of signal source is connected with the input of power amplifier by the second coaxial cable, the outfan of power amplifier is connected with the input of feed-through type power meter by the first coaxial cable, the outfan of feed-through type power meter connects short wavelength emissions antenna by short connecting line, the position of short-wave receiving antenna remains unchanged (being placed on distance short wavelength emissions antenna certain void spaces farther out), and the output of reception antenna connects spectrum analyzer.
The working frequency points of signal source is set to f1, continuous wave launch, record feed-through type power meter show pass through power P2(unit: W) and spectrum analyzer are at working frequency points (frequency) f1Amplitude V2(unit: dBuV).
According to Principle of Antenna, all fixing in short wavelength emissions antenna, short-wave receiving antenna position, and when spacing meets far field condition, the power proportional that short wavelength emissions antenna the is launched field intensity in short-wave receiving antenna place square.
Assume short-wave transmitter f1When frequency is launched, the actual emanations power of short wavelength emissions antenna is P3, the field intensity at short-wave receiving antenna place is E1(unit: V/m)；Signal source and power amplifier are at working frequency points f1During transmitting, the field intensity at short-wave receiving antenna place is E2(unit: V/m), then have:
P 3 P 2 = ( E 1 E 2 ) 2
Assuming that short-wave receiving antenna is at f1The antenna factor of frequency is K (unit: dB/m), then short-wave transmitter, signal source and power amplifier are at working frequency points f1When launching respectively, the field intensity at short-wave receiving antenna place is respectively as follows:
E 1 = 10 V 1 + K - 120 20
E 2 = 10 V 2 + K - 120 20
Therefore, the actual emission power P of Fig. 3 intermediate waves antenna3:
P 3 = P 2 × 10 V 1 - V 2 20
Antenna tuner is at working frequency points f1Insertion loss IL be:
I L = 10 × log 10 P 1 P 3 = P 1 P 2 × 10 V 2 - V 1 20 .
Should be understood that above-described embodiment is merely to illustrate the present invention rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, the present invention can be made various changes or modifications by those skilled in the art, and without deviating from the spirit and scope of technical solution of the present invention, it all should be encompassed in scope of the presently claimed invention.

Claims (2)

1. a shortwave antenna tuning coupler insert loss device, it is characterized in that, test cell is launched including actual transmission machine, test cell launched by signal source and power amplifier, described actual transmission machine is launched test cell and is included short-wave transmitter, feed-through type power meter, antenna harmony device, short wavelength emissions antenna, short-wave receiving antenna and spectrum analyzer, short-wave transmitter is connected with the input of feed-through type power meter by the first coaxial cable, the outfan of feed-through type power meter connects antenna tuner by short connecting line, antenna tuner is connected with short wavelength emissions antenna by cable, short-wave receiving antenna is placed on distance short wavelength emissions antenna certain void spaces farther out, the output of reception antenna connects spectrum analyzer；Described signal source and power amplifier are launched test cell and are included signal source, power amplifier, feed-through type power meter, short wavelength emissions antenna, short-wave receiving antenna and spectrum analyzer, the output of signal source is connected with the input of power amplifier by the second coaxial cable, the outfan of power amplifier connects through formula energy meter by the first coaxial cable, the output of feed-through type power meter connects short wavelength emissions antenna by short connecting line, the position of short-wave receiving antenna remains unchanged, and the output of reception antenna connects spectrum analyzer.
2. the measuring method of the shortwave antenna tuning coupler insert loss device described in the claims 1, it is characterised in that comprise the steps:
S1, connect actual transmission machine launch test cell, short-wave transmitter is launched in working frequency points f1 continuous wave mode, record feed-through type power meter show by power P 1, employing short-wave receiving antenna receives, record short-wave transmitter when working frequency points f1 launches, the voltage V1 that short-wave receiving antenna receives at f1 frequency；
S2, connect signal source and power amplifier and launch test cell, signal source, power amplifier is adopted to connect through formula energy meter, the output of feed-through type power meter connects short wavelength emissions antenna, signal source working frequency points is set to f1, continuous wave is launched, the voltage V2 received at f1 frequency by power P 2 and short-wave receiving antenna that record feed-through type power meter shows；
S3, calculating antenna tuner are at the insertion loss IL of working frequency points f1:
I L = P 1 P 2 × 10 v 2 - v 1 20 .
CN201610209020.9A 2016-04-06 2016-04-06 A kind of shortwave antenna tuning coupler insert loss device and method Active CN105738708B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105974347A (en) * 2016-07-22 2016-09-28 北京润科通用技术有限公司 Calibration method and system of test system
CN106911401A (en) * 2017-02-21 2017-06-30 熊猫电子集团有限公司 A kind of shortwave day adjusts insertion loss method of testing and fixture
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
CN109581080A (en) * 2018-12-21 2019-04-05 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） For assessing the aerial test equipment of short-wave antenna performance
CN110470973A (en) * 2019-08-05 2019-11-19 浙江铖昌科技有限公司 A kind of low noise chip noise coefficient automation On-wafer measurement system
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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CN105391502A (en) * 2015-12-31 2016-03-09 陕西烽火电子股份有限公司 Method for measuring actual output impedance of transmitter

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EP1384285A1 (en) * 2001-04-11 2004-01-28 Kyocera Wireless Corporation Ferroelectric antenna and method for tuning same
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105974347A (en) * 2016-07-22 2016-09-28 北京润科通用技术有限公司 Calibration method and system of test system
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
CN106911401A (en) * 2017-02-21 2017-06-30 熊猫电子集团有限公司 A kind of shortwave day adjusts insertion loss method of testing and fixture
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
CN109581080A (en) * 2018-12-21 2019-04-05 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） For assessing the aerial test equipment of short-wave antenna performance
CN110470973A (en) * 2019-08-05 2019-11-19 浙江铖昌科技有限公司 A kind of low noise chip noise coefficient automation On-wafer measurement system
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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