CN105116261A - Method for measuring corrugated horn loss - Google Patents

Method for measuring corrugated horn loss Download PDF

Info

Publication number
CN105116261A
CN105116261A CN201510566760.3A CN201510566760A CN105116261A CN 105116261 A CN105116261 A CN 105116261A CN 201510566760 A CN201510566760 A CN 201510566760A CN 105116261 A CN105116261 A CN 105116261A
Authority
CN
China
Prior art keywords
corrugated horn
noise
horn
load
loss
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.)
Granted
Application number
CN201510566760.3A
Other languages
Chinese (zh)
Other versions
CN105116261B (en
Inventor
秦顺友
杜彪
邹火儿
李振生
张立军
吴伟伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CETC 54 Research Institute
Original Assignee
CETC 54 Research Institute
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CETC 54 Research Institute filed Critical CETC 54 Research Institute
Priority to CN201510566760.3A priority Critical patent/CN105116261B/en
Publication of CN105116261A publication Critical patent/CN105116261A/en
Application granted granted Critical
Publication of CN105116261B publication Critical patent/CN105116261B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

The invention discloses a method for measuring corrugated horn loss. According to the method, the noise power of a directional normal temperature load and cold load of a corrugated horn are measured respectively, and the noise temperature of the corrugated horn is determined, and therefore, the loss of the corrugated horn can be calculated. The method is simple and feasible, and has popularization and application values.

Description

A kind of method measuring corrugated horn loss
Technical field
The present invention relates to the corrugation loudspeaker feed source of reflector antenna, be specially adapted to the measurement of corrugated horn loss.
Background technology
As everyone knows, corrugated horn can in the wide-band of 2:1, there is the electric property that the main polarization directional diagram of axisymmetry, pole low-cross polarization peak level, good matching properties and splendid low sidelobe characteristic etc. are excellent, be widely used in the high efficiency feed of reflector antenna.But corrugated horn is in radio astronomy and survey of deep space application, the loss of corrugated horn is also very important index.Corrugated horn loss is very little, measures very difficult, usually adopts hydraucone short-circuit method to measure.The method is measured corrugated horn loss and be there is following limitation:
1, traditional short-circuit method measures corrugated horn loss, and when corrugated horn is single mode operation, because the loss of corrugated horn is very little, and the impact of measuring system multipath reflection is inevitable, is difficult to accurately measure;
2, traditional short-circuit method measures corrugated horn loss, and when corrugated horn is multimode operation, due to the impact of corrugated horn multimode, measuring error is very large.
Summary of the invention
The object of the invention is to avoid the weak point in above-mentioned background technology and propose a kind of method measuring corrugated horn loss.Noise power when the method points to normal temperature load and cold load respectively by measuring corrugated horn, calculates the noise temperature of corrugated horn, calculates the loss of corrugated horn thus.
Measure a method for corrugated horn loss, it is characterized in that comprising the following steps:
(1) noise temperature of corrugated horn is measured: measure noise power during noise power and the corrugated horn sensing cold load of corrugated horn sensing normal temperature load with spectrum analyzer respectively, utilize following formula to calculate the noise temperature of corrugated horn:
T C ′ = ( T 0 + T L N A ) 10 ( N h o t - N c o l d ) / 10 - T L N A
In formula:
T ' cthe noise temperature of-corrugated horn, K;
T 0the environment temperature of-Feed Horn, K;
T lNAthe noise temperature of-low noise amplifier, K;
N hotwhen-corrugated horn points to normal temperature load, the noise power that spectrum analyzer is measured, dBm;
N coldwhen-corrugated horn points to cold load, the noise power that spectrum analyzer is measured, dBm;
(2) the loss IL of corrugated horn is calculated horn: the corrugated horn noise temperature obtained according to step (1), is calculated the loss of corrugated horn by following formula:
IL h o r n = 10 × l o g ( T C - T 0 T C ′ - T 0 )
In formula:
T cthe noise temperature of-cold load, K;
Complete the measurement of corrugated horn loss.
Wherein, be specially by the method that the noise power that corrugated horn points to when the noise power of normal temperature load and corrugated horn point to cold load measured respectively by spectrum analyzer in step (1): set up test macro, corrugated horn is pointed to normal temperature load, by the size of spectrum analyzer measurement noises power, use N hotrepresent; Then corrugated horn is pointed to cold load, keep the state parameter of spectrum analyzer to arrange constant, by the size of spectrum analyzer measurement noises power, use N coldrepresent.
Wherein, described normal temperature load is microwave absorbing material, and its size should be greater than the area of corrugated horn mouth.
Wherein, described cold load for being immersed in microwave absorbing material in cryogenic liquid, and requires that microwave absorbing material is submerged in cryogenic liquid completely, and described cryogenic liquid comprises liquid nitrogen and liquid helium.
The present invention's tool compared with background technology has the following advantages:
1, utilize the loss of cold and hot load measure corrugated horn, measuring accuracy is high;
2, the method test macro is simple, and can reduce the impact of multipath reflection on measurement result, measuring repeatability is good;
3, the present invention has good promotion and application value.
Accompanying drawing explanation
Fig. 1 is measuring principle figure of the present invention.
Embodiment
With reference to Fig. 1, test macro is made up of normal temperature load, cold load, low noise amplifier, radio frequency testing cable, spectrum analyzer and corrugated horn to be measured.By measuring noise power when corrugated horn sensing normal temperature load and cold load respectively, calculating the noise temperature of corrugated horn, being calculated the loss of corrugated horn by corrugated horn noise temperature.
Shown in accompanying drawing 1, measure the principle schematic of corrugated horn loss.In the middle of specific embodiment, corrugated horn to be measured works in X-band, operating frequency range 7.25GHz ~ 7.75GHz.Test frequency is the noise temperature T of 7.5GHz, low noise amplifier lNA=80K, the noise temperature T of normal temperature load 0=290K, the noise temperature T of cold load c=77K.Then the measuring method step of corrugated horn mouth loss is as follows:
1st step: the noise temperature measuring corrugated horn.Shown in accompanying drawing 1, first set up test macro, then corrugated horn is pointed to normal temperature load, by the size of spectrum analyzer measurement noises power, use N hotrepresent; Subsequently corrugated horn is pointed to cold load, keep the state parameter of spectrum analyzer to arrange constant, in like manner use the size of spectrum analyzer measurement noises power, use N coldrepresent.By the noise temperature T ' of the noise power calculation corrugated horn measured c.
T C ′ = ( T 0 + T L N A ) 10 ( N h o t - N c o l d ) / 10 - T L N A
In the middle of embodiment, when corrugated horn points to normal temperature load, the noise power-67.38dBm that spectrum analyzer is measured; When corrugated horn points to cold load, the noise power that spectrum analyzer is measured is-71.02dBm.The noise temperature of corrugated horn is:
T C ′ = ( 290 + 80 ) 10 ( - 67.38 + 71.02 ) / 10 - 80 = 80.03
2nd step: by the noise temperature of the corrugated horn measured, is calculated the loss of corrugated horn by following formula:
IL h o r n = 10 × l o g ( T C - T 0 T C ′ - T 0 )
The loss of the corrugated horn in the middle of embodiment is:
IL h o r n = 10 × l o g ( 77 - 290 80.03 - 290 ) = 0.062
Principle of work of the present invention is as follows:
The present invention proposes a kind of method measuring corrugated horn loss.
The method, by measuring the noise power that corrugated horn points to normal temperature load and cold load respectively, calculates the noise temperature of corrugated horn, determines the loss of corrugated horn thus.

Claims (4)

1. measure a method for corrugated horn loss, it is characterized in that comprising the following steps:
(1) noise temperature of corrugated horn is measured: measure noise power during noise power and the corrugated horn sensing cold load of corrugated horn sensing normal temperature load with spectrum analyzer respectively, utilize following formula to calculate the noise temperature of corrugated horn:
T C ′ = ( T 0 + T L N A ) 10 ( N h o t - N c o l d ) / 10 - T L N A
In formula:
T ' cthe noise temperature of-corrugated horn, K;
T 0the environment temperature of-Feed Horn, K;
T lNAthe noise temperature of-low noise amplifier, K;
N hotwhen-corrugated horn points to normal temperature load, the noise power that spectrum analyzer is measured, dBm;
N coldwhen-corrugated horn points to cold load, the noise power that spectrum analyzer is measured, dBm;
(2) the loss IL of corrugated horn is calculated horn: the corrugated horn noise temperature obtained according to step (1), is calculated the loss of corrugated horn by following formula:
IL h o r n = 10 × l o g ( T C - T 0 T C ′ - T 0 )
In formula:
T cthe noise temperature of-cold load, K;
Complete the measurement of corrugated horn loss.
2. a kind of method measuring corrugated horn loss according to claim 1, it is characterized in that: be specially by the method that the noise power that corrugated horn points to when the noise power of normal temperature load and corrugated horn point to cold load measured respectively by spectrum analyzer in step (1): set up test macro, corrugated horn is pointed to normal temperature load, by the size of spectrum analyzer measurement noises power, use N hotrepresent; Then corrugated horn is pointed to cold load, keep the state parameter of spectrum analyzer to arrange constant, by the size of spectrum analyzer measurement noises power, use N coldrepresent.
3. a kind of method measuring corrugated horn loss according to claim 1 and 2, it is characterized in that described normal temperature load is microwave absorbing material, its size should be greater than the area of corrugated horn mouth.
4. a kind of method measuring corrugated horn loss according to claim 1 and 2, it is characterized in that described cold load is for being immersed in microwave absorbing material in cryogenic liquid, and requiring that microwave absorbing material is submerged in cryogenic liquid completely, described cryogenic liquid comprises liquid nitrogen and liquid helium.
CN201510566760.3A 2015-09-08 2015-09-08 A kind of method for measuring corrugated horn loss Active CN105116261B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510566760.3A CN105116261B (en) 2015-09-08 2015-09-08 A kind of method for measuring corrugated horn loss

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510566760.3A CN105116261B (en) 2015-09-08 2015-09-08 A kind of method for measuring corrugated horn loss

Publications (2)

Publication Number Publication Date
CN105116261A true CN105116261A (en) 2015-12-02
CN105116261B CN105116261B (en) 2017-11-14

Family

ID=54664297

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510566760.3A Active CN105116261B (en) 2015-09-08 2015-09-08 A kind of method for measuring corrugated horn loss

Country Status (1)

Country Link
CN (1) CN105116261B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107202929A (en) * 2017-06-23 2017-09-26 中国电子科技集团公司第五十四研究所 A kind of method for measuring the loss of rectangular waveguide component
CN110082610A (en) * 2019-04-26 2019-08-02 中国电子科技集团公司第五十四研究所 A kind of method of measurement standard electromagnetic horn gain
CN110907733A (en) * 2019-12-04 2020-03-24 上海航天测控通信研究所 Method for testing energy leakage of quasi-optical feed network system
CN110932696A (en) * 2019-11-16 2020-03-27 中国电子科技集团公司第三十九研究所 Single microwave quantum source device based on low-sidelobe corrugated horn working at normal temperature

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102590616A (en) * 2012-03-12 2012-07-18 中国电子科技集团公司第五十四研究所 Method for measuring insertion loss of any position of antenna housing
US20140009351A1 (en) * 2012-04-27 2014-01-09 Thales Cornet d'antenne a grille corruguee
CN104181511A (en) * 2013-05-23 2014-12-03 中国科学院空间科学与应用研究中心 Scaling method of foundation microwave radiometer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102590616A (en) * 2012-03-12 2012-07-18 中国电子科技集团公司第五十四研究所 Method for measuring insertion loss of any position of antenna housing
US20140009351A1 (en) * 2012-04-27 2014-01-09 Thales Cornet d'antenne a grille corruguee
CN104181511A (en) * 2013-05-23 2014-12-03 中国科学院空间科学与应用研究中心 Scaling method of foundation microwave radiometer

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
T. NAKAJIMA ET.AL: "A New 100-GHz Band Two-Beam Sideband-Separating SIS Receiver for Z-Machine on the NRO 45-m Radio Telescope", 《HTTP://ARXIV.ORG/PDF/1302.0575.PDF》 *
ZHEN-DONG WU, SHUN-YOU QIN: "Effect Study of Spectrum Analyzer Noise Floor on Antenna Noise Temperature Measurement", 《ANTENNAS,PROPAGATION&EM THEORY(ISAPE),2012 10TH INTERNATIONAL SYMPOSIUM ON》 *
国家技术监督局: "卫星电视地球接收站测量方法天线测量", 《中华人民共和国国家标准 GB/T 11298.2-1997》 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107202929A (en) * 2017-06-23 2017-09-26 中国电子科技集团公司第五十四研究所 A kind of method for measuring the loss of rectangular waveguide component
CN107202929B (en) * 2017-06-23 2019-05-07 中国电子科技集团公司第五十四研究所 A method of measurement rectangular waveguide component loss
CN110082610A (en) * 2019-04-26 2019-08-02 中国电子科技集团公司第五十四研究所 A kind of method of measurement standard electromagnetic horn gain
CN110082610B (en) * 2019-04-26 2021-03-09 中国电子科技集团公司第五十四研究所 Method for measuring standard horn antenna gain
CN110932696A (en) * 2019-11-16 2020-03-27 中国电子科技集团公司第三十九研究所 Single microwave quantum source device based on low-sidelobe corrugated horn working at normal temperature
CN110907733A (en) * 2019-12-04 2020-03-24 上海航天测控通信研究所 Method for testing energy leakage of quasi-optical feed network system
CN110907733B (en) * 2019-12-04 2021-08-10 上海航天测控通信研究所 Method for testing energy leakage of quasi-optical feed network system

Also Published As

Publication number Publication date
CN105116261B (en) 2017-11-14

Similar Documents

Publication Publication Date Title
CN101459477B (en) Automatic test method for mobile phone antenna radiation performance
CN101510806B (en) Method and apparatus for testing total omnidirectional sensitivity of transmit-receive cofrequency mobile terminal
CN105116261A (en) Method for measuring corrugated horn loss
CN102255678B (en) Method for measuring insertion loss of feed network
CN102237933B (en) Method and device for testing effective isotropic sensitivity (EIS)
CN103000996B (en) Uniform circular array direction-finder antenna receiving mutual impedance test and mutual coupling compensation system
CN102590616B (en) Method for measuring insertion loss of any position of antenna housing
CN203838296U (en) Multi-path signal peak collection device based on partial-discharge spatial orientation system
CN103344841A (en) Free space terminal short-circuit system for temperature changing measurement of dielectric property of dielectric material
CN111474411A (en) Relative dielectric constant test system, method, device and storage medium
CN112558001B (en) Pulse high-power field calibration device and method
CN104967490A (en) Free space transmission reflection calibration method
CN103605102A (en) Field calibration method for radiated emission measurement antenna of electromagnetic compatibility experiment
CN103986532A (en) Method for judging relative value electromagnetic interference of multi-mode and multi-standby terminal
CN104049151A (en) High-power microwave radiation field measuring method and device based on comparison method
CN102938904A (en) Standing-wave ratio detecting method, device and base station
CN106353589A (en) Coupling detector
CN104819952A (en) Method and system for measuring polarization characteristics of material at terahertz wave band
US20150105031A1 (en) Efficient Whole-Body SAR Estimation
Hitzler et al. Key aspects of robot based antenna measurements at millimeter wave frequencies
CN101477154B (en) Method for testing antenna omnidirectional radiation total power by using GTEM closet
CN103297154A (en) Method and device for detecting standing-wave ratio
CN203164295U (en) Apparatus for measuring input impedance and resonant frequency of power transmission line iron tower
CN110579648A (en) antenna gain judging method and judging device
CN104994460A (en) Method for measuring transmission loss of sealing film of feed source horn mouth

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant