A method for measuring the reflectivity of absorbing materials based on a calibration sphere

A technology of wave absorbing material and testing method, which is applied in the direction of material analysis, analysis material, and measuring device using microwave means, can solve the problem of accurate evaluation of reflectivity characteristics of unfavorable wave absorbing material plates, difficult to adjust in place, and large measurement error. and other problems, to achieve the effect of solving measurement accuracy problems, long calibration period, and easy engineering use.

Active Publication Date: 2016-04-27
CHINA ELECTRONIS TECH INSTR CO LTD
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Problems solved by technology

Although this method can greatly improve the transceiver isolation and the ability of the receiver to measure the target echo signal, and reduce the measurement error, this method also has the problems of antenna erection, material plate placement alignment, complex adjustment and difficult adjustment. In addition, due to the small thickness of the measured target, it is difficult to place it vertically on the support, which will cause a large angular deviation, which in turn will lead to large measurement errors, which is not conducive to the accurate evaluation of the reflectivity characteristics of the absorbing material plate

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  • A method for measuring the reflectivity of absorbing materials based on a calibration sphere
  • A method for measuring the reflectivity of absorbing materials based on a calibration sphere

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments.

[0036] Such as figure 1 As shown, a method for testing the reflectivity of absorbing materials based on a calibration sphere includes the following steps:

[0037] (1), select the main control computer 1, the transmitter 2, the receiver 5, the transmitting antenna 3, the receiving antenna 6, the test cable 8 and the target bracket 7, and select the appropriate diameter size according to the test frequency of the incident microwave and other site factors Two high-gloss metal balls are used as the test target 4; the diameter of the metal balls needs to be greater than 5 times the wavelength of the incident microwave and less than 15 times the wavelength of the incident microwave;

[0038] (2), one of the metal balls in the above steps is treated with a surface-coated absorb...

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Abstract

The invention discloses a calibrating ball based wave-absorbing material reflectivity testing method. According to the method, a main control computer, a transmitter, a receiver, a transmitting antenna and a receiving antenna are taken as a testing system, and the testing accuracy of the reflectivity of a wave-absorbing material is increased through the calibrating ball based reflectivity testing method. The calibrating ball based wave-absorbing material reflectivity testing method not only solves the problem of testing error caused by alignment errors, transceiving coupling and the like between a tested target and the transmitting and receiving antennas in the process of testing the reflectivity of the wave-absorbing material, but also increases the testing accuracy; moreover, the method provided by the invention is simple in implementation mode and flexible in installation.

Description

technical field [0001] The invention relates to a method for testing the reflectivity of a wave-absorbing material, in particular to a method for testing the reflectivity of a wave-absorbing material based on a calibration sphere. Background technique [0002] Microwave absorbing material RAM, referred to as microwave absorbing material, can effectively attenuate electromagnetic wave energy, eliminate or weaken electromagnetic interference, and then reduce the radar cross section of various targets, which plays an important role in stealth technology. In the process of researching and applying wave-absorbing materials, it is necessary to understand the wave-absorbing properties of wave-absorbing materials. Therefore, it is particularly important to measure the reflectivity of wave-absorbing materials accurately and conveniently. It is mainly the arched frame method or the far-field RCS method. [0003] The arched frame method is a method in which the receiving and transmitt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N22/00
Inventor 刘伟王亚海常庆功颜振殷志军杜刘革
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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