CN106850085B - Device for testing radio frequency response performance of material - Google Patents
Device for testing radio frequency response performance of material Download PDFInfo
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- CN106850085B CN106850085B CN201611247435.1A CN201611247435A CN106850085B CN 106850085 B CN106850085 B CN 106850085B CN 201611247435 A CN201611247435 A CN 201611247435A CN 106850085 B CN106850085 B CN 106850085B
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- loudspeaker
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0085—Monitoring; Testing using service channels; using auxiliary channels using test signal generators
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention provides a device for testing radio frequency response performance of a material, which comprises a twin pyramid loudspeaker and a general pyramid loudspeaker, wherein the twin pyramid loudspeaker and the general pyramid loudspeaker are connected to form a closed cavity; the test sample is placed at the joint of the twin pyramid loudspeaker and the common pyramid loudspeaker; one port of the twin pyramid loudspeaker is connected with a microwave source, and the other port is positioned on the reflected wave path and connected with a reflected wave testing device in parallel; the port of the regular pyramid horn is positioned on the transmission wave path and connected with a transmission wave testing device in parallel. Compared with the radio frequency response performance of a test material in a waveguide channel, the microwave source outputs microwaves to irradiate a material sample through one port of the twin pyramid horn of the vacuum sealing cavity, reflected waves are reflected to the other port of the twin pyramid horn, transmitted waves are transmitted to the common pyramid horn, and the reflected microwaves of the method have very small influence on the microwave source and have the characteristic of protecting the microwave source from the reflected microwaves.
Description
Technical Field
The invention belongs to the technical field of HPM transmission and emission, and particularly relates to a device for testing radio frequency response performance of a material.
Background
In order to reduce the volume and weight of the antenna, the antenna reflecting surface material is changed from the original metal material to the carbon fiber reflecting surface material, the mesh surface material and the like which are frequently used at present, and the application of the materials can reduce the weight of the antenna and the volume of the antenna.
Compared with the metal reflecting surface material, the reflecting performance of the carbon fiber and the metal net surface material is reduced, and certain microwave transmission characteristics exist, so that accurate testing of the radio frequency response performance of the reflecting surface material is an important standard for finally determining the antenna performance.
There are two general methods for testing materials, as shown in fig. 1, in which the first method is to test the radio frequency response performance of the material in a waveguide, and in this method, the reflected wave of the material sample is directly reflected back to the microwave source, and if the power of the microwave source is large, the microwave source may be greatly affected, or even damaged, so that the system cannot work normally. The second method is that a 1m x 1m test piece is selected as a material sample, a comparison method is adopted during measurement, the incident angle of a radiation unit is 45 degrees, the angle is close to the actual application of an antenna, and the measurement result of an aluminum plate with the same size at the same position is used as a reference. The method has the advantages of large workload and complex structure, and can only obtain the reflection performance of the material, but can not obtain the test results of parameters such as the transmission performance of the material.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a device for testing the radio frequency response performance of a material, which can simultaneously obtain test results of parameters such as the reflection performance, the transmission performance and the like of the material.
The technical solution of the invention is to provide a device for testing the radio frequency response performance of a material, which is characterized in that: the device comprises a twin pyramid loudspeaker and a general pyramid loudspeaker, wherein the twin pyramid loudspeaker and the general pyramid loudspeaker are connected to form a closed cavity;
the test sample is placed at the joint of the twin pyramid loudspeaker and the common pyramid loudspeaker;
one port of the twin pyramid loudspeaker is connected with a microwave source; the other port is positioned on the reflected wave path and connected with a reflected wave testing device in parallel; the port of the regular pyramid horn is positioned on the transmission wave path and connected with a transmission wave testing device in parallel.
The reflection coefficient of the injection port of the twin pyramid horn microwave source is less than 5%; the transmission coefficient of the reflected wave port is higher than 90%.
In order to optically diagnose whether the breakdown phenomenon occurs on the surface of the sample, an observation window is arranged on the sealed cavity; preferably, the window is located on a regular pyramid horn.
In order to meet the requirement of high-power microwave test, the sealed cavity is provided with a vacuumizing interface, and a vacuum environment required in the vacuum cavity can be obtained through vacuumizing equipment.
Preferably, the twin pyramid horn and the general pyramid horn are connected by a flange.
The invention also provides a method for testing the radio frequency response performance of the material, wherein microwaves output by a microwave source are irradiated onto a material sample to be tested through one port of a twin pyramid horn of a vacuum sealing cavity, reflected waves are reflected to the other port of the twin pyramid horn, and transmitted waves are transmitted to a general pyramid horn; the reflection coefficient of the injection port of the twin pyramid horn microwave source is less than 5%; the transmission coefficient of the reflected wave port is higher than 90%.
The invention has the advantages that:
(1) Compared with the radio frequency response performance of a test material in a waveguide channel, microwave output by a microwave source irradiates a material sample through one port of a twin pyramid horn of a vacuum sealing cavity, reflected waves are reflected to the other port of the twin pyramid horn, transmitted waves are transmitted to a common pyramid horn, and the reflected microwaves of the method have very little influence on the microwave source and have the characteristic of protecting the microwave source from being influenced by the reflected microwaves;
(2) Compared with the second method using common materials, the method can obtain the reflection and transmission characteristics of the materials at the same time, and has simple structure and convenient installation;
(3) According to the method, the material sample is placed in the vacuum sealing cavity, and the radio frequency response performance of the material can be tested in a vacuum simulation environment.
(4) By video diagnosis of the observation window and testing of reflected and transmitted waves, it can be diagnosed whether breakdown occurs on the surface of the material.
Drawings
FIG. 1 is a block diagram of a prior art material reflectance waveguide reflectometry test;
FIG. 2 is a schematic diagram of a prior art reflectance radiation reflectance method test of a material under test;
fig. 3 is a schematic view of the structure of the device of the present invention.
The reference numerals in the drawings are: the device comprises a 1-measured component, a 2-waveguide directional coupler, 3-waveguide coaxial conversion, 4-waveguide matched load, a 5-radiation unit, a first port of a 6-twin pyramid horn, a second port of a 7-twin pyramid horn, a port of an 8-general pyramid horn, a 9-twin pyramid horn, a 10-closed cavity, an 11-general pyramid horn, a 12-observation window and a 13-vacuumizing interface.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 3, the device for testing the radio frequency response performance of the material comprises a vacuum sealing cavity 10 formed by a twin pyramid loudspeaker 9 and a common pyramid loudspeaker 11, wherein a test sample 1 is arranged between the twin pyramid loudspeaker 9 and the common pyramid loudspeaker 11, a first port of the twin pyramid loudspeaker 9 is connected with a microwave source, a second port 7 is connected with a reflected wave testing device, a port 8 of the common pyramid loudspeaker 11 is connected with a transmitted wave testing device, and an observation window 12 and a vacuumizing interface 13 are arranged on the vacuum sealing cavity 10; the observation window 12 can be used for video diagnosis of whether breakdown occurs on the surface of the sample 1, and vacuum is pumped to the sealed cavity 10 through the vacuum pumping interface 13.
The principle of the invention is as follows:
the caliber of the twin pyramid horn of the experimental device is 106.26 multiplied by 86.8mm, the two ports are connected by pi bend, the ports are BJ100 standard waveguide size, the caliber of the common pyramid horn is consistent with that of the twin pyramid horn, and the ports are also BJ100 standard waveguide size. The material sample is placed between the two, and the material sample meets the required flatness by clamping. When the high-power microwave test is performed, a vacuum environment required in the vacuum cavity can be obtained through the vacuumizing equipment. The microwave is injected through one port of the twin pyramid horn, irradiates the material sample, is reflected out through the other port, and the common pyramid horn port receives the transmitted microwave.
Claims (5)
1. An apparatus for testing the radio frequency response properties of a material, comprising: the device comprises a twin pyramid loudspeaker and a general pyramid loudspeaker, wherein the twin pyramid loudspeaker and the general pyramid loudspeaker are connected to form a closed cavity;
the test sample is placed at the joint of the twin pyramid loudspeaker and the common pyramid loudspeaker;
one port of the twin pyramid loudspeaker is connected with a microwave source, and the other port is positioned on the reflected wave path and connected with a reflected wave testing device in parallel; the port of the general pyramid horn is positioned on the transmission wave path and connected with a transmission wave testing device in parallel;
the method for testing by adopting the device for testing the radio frequency response performance of the material comprises the following steps:
the microwave output by the microwave source irradiates the material sample to be measured through one port of the twin pyramid horn of the vacuum sealing cavity, the reflected wave is reflected to the other port of the twin pyramid horn, and the transmitted wave is transmitted to the common pyramid horn; the reflection coefficient of the injection port of the twin pyramid horn microwave source is less than 5%; the transmission coefficient of the reflected wave port is higher than 90%.
2. The apparatus for testing the radio frequency response properties of a material of claim 1, wherein: the closed cavity is provided with an observation window.
3. The apparatus for testing the radio frequency response properties of a material of claim 2, wherein: the observation window is positioned on a common pyramid loudspeaker.
4. An apparatus for testing the radio frequency response properties of a material according to any one of claims 1 to 2, wherein: and the airtight cavity is provided with a vacuumizing interface.
5. An apparatus for testing the radio frequency response properties of a material according to any one of claims 1 to 2, wherein: the twin pyramid horn is connected with the common pyramid horn through a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611247435.1A CN106850085B (en) | 2016-12-29 | 2016-12-29 | Device for testing radio frequency response performance of material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611247435.1A CN106850085B (en) | 2016-12-29 | 2016-12-29 | Device for testing radio frequency response performance of material |
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| CN106850085A CN106850085A (en) | 2017-06-13 |
| CN106850085B true CN106850085B (en) | 2023-07-21 |
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| CN108595785B (en) * | 2018-03-30 | 2021-12-24 | 西北核技术研究所 | HPM (high performance multi-processor) generating device optimization method based on multi-objective optimization algorithm |
| CN111239165B (en) * | 2020-01-22 | 2023-07-21 | 西北核技术研究院 | High-power impulse response testing device for antenna surface material |
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| RU2079144C1 (en) * | 1994-07-14 | 1997-05-10 | Владимир Николаевич Аплеталин | Device for measurement of complex reflection factor in quasi-optical sections |
| CN101404508B (en) * | 2008-10-15 | 2012-08-29 | 北京航空航天大学 | Compact range feed source suitable for indoor ultra-broadband wireless communication frequency band |
| CN103728321B (en) * | 2013-12-20 | 2016-06-08 | 刘宝帅 | Multifunctional material electromagnetic parameter test system and method for testing |
| CN206452391U (en) * | 2016-12-29 | 2017-08-29 | 西北核技术研究所 | A kind of device of test material radio-frequency responsive performance |
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| US5039949A (en) * | 1987-06-01 | 1991-08-13 | Hemming Leland H | RF absorber test system |
| US4906998A (en) * | 1988-04-28 | 1990-03-06 | Yoshiaki Kaneko | Radio-frequency anechoic chamber |
| WO1997012251A1 (en) * | 1995-09-26 | 1997-04-03 | Podgorski Andrew S | Dual polarization electromagnetic field simulator |
| CN1936609A (en) * | 2005-09-23 | 2007-03-28 | 西安科耐特科技有限责任公司 | Detection apparatus for cable assembly radio-frequency leakage and detection method |
| CN104882660A (en) * | 2014-04-30 | 2015-09-02 | 西安空间无线电技术研究所 | C-frequency-band test coupler |
| CN104923141A (en) * | 2015-06-11 | 2015-09-23 | 四川大学 | Single-mode microwave chemical device based on extended rectangular waveguide size |
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