Broadband reduction RCS composite material based on crossed bow-tie-shaped AMC
A composite material and bow-tie-shaped technology, which is applied in the field of stealth, can solve the problems of reducing practical value, narrow operating frequency band of absorbing materials, and inability to support broadband, etc., and achieve the effect of small thickness, excellent broadband performance, and low processing and manufacturing difficulty
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[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0020] Compared with other patch antennas, the bowtie antenna has good broadband characteristics, and the characteristic impedance can be maintained in a wider frequency band, so the cross bowtie patch has broadband characteristics as an AMC unit, and at the same time, two reflected waves with opposite phases will occur The phenomenon of interference and destructiveness reduces the backward energy, and the closer the phase difference is to 180°, the lower the backward energy. According to the array antenna theory, there is a corresponding relationship between the phase difference frequency bands of the two AMC arrays and the RCS reduction frequency band of this composite material. Taking the metal plate of the same size as the comparison object, if -10dB is selected as the reduction target, the two AMC arrays The reflection phase difference range is 180°±37°....
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