Measuring apparatus for reflection index of wave suction material

Abstract

The invention belongs to the technical field of microwave and millimeter wave testing, relates to the reflectivity testing of wave absorptive materials of microwave and millimeter wave, and provides a testing device that measures the reflectivity of the wave absorptive materials according to an arc method. Compared with the existing reflectivity testing devices of the wave absorptive materials with arc methods, the invention provides an arc rail that is composed of a first ally arm (7) shaped like a character '7' and a second ally arm (8) and can rotate around a rotating shaft of an electric rotating motor (12). When being utilized in the reflectivity measurement of different incident angles, the testing device has ultra-convenient angle control and fixed radiuses of the ally arms, thus reducing the testing error caused by radius change. After adopting the structure that is shaped like the character '7', the testing device has reduced volume, and consequently can effectively reduce the disperse emission caused by an antenna fixing frame, raises measuring precision, and is convenient for loading, unloading, transportation and storage.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter wave testing, and relates to the reflectivity testing technology of microwave and millimeter wave absorbing materials. Background technique [0002] Absorbing materials are widely used in military and civilian fields. With the rapid development of stealth technology, the requirements for the absorbing performance of absorbing materials are getting higher and higher. Reflectivity is an important index parameter used to characterize the absorbing performance of absorbing materials. Under a given wavelength and polarization condition, the measured high loss can be obtained by measuring the ratio of the reflected power of the electromagnetic wave from the same direction and the same power density to the mirror direction of the sample sample to be tested and the good conductor plane of the same size. The reflectivity of the material, see formula (1). [0003] Γ ...

AI Technical Summary

Problems solved by technology

In the process of using the bow method to measure the reflectivity of the absorbing material, due to the poor accuracy of the radius consistency of the bow track and the positioning angle of the antenna, this directly affects the measurement accuracy of the reflectance of the absorbing material

Moreover, the large volume of the bow-shaped track will introduce certain scattering, which will also have a certain impact on the measurement accuracy and measurement range; at the same time, the bow-shaped track occupies a large space, which brings great inconvenience to the moving and storage of the test system

[0014] To sum up, the bow method is usually used at home and abroad to measure the reflectivity of absorbing materials under different incident angles, but the bow track has low processing accuracy due to the consistency of the radius during production, and will introduce certain scattering problems, so that Limits the further improvement of the reflectivity measurement accuracy of absorbing materials under different incident angles

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