Frequency selective absorber with in-band rcs reduction

Abstract

The application discloses a frequency selective wave absorber with in-band RCS reduction. The application is based on the existing absorption type frequency selective surface technology, and a polarization rotation impedance layer is used to replace a metal reflecting surface below a lossy layer, and impedance matching is performed with the characteristic impedance of an isolation dielectric layer, so that a polarization rotation reflection band is constructed at an antenna operating frequency band, and in-band RCS reduction is realized. In the operating frequency band, the wave absorber exhibits unique polarization rotation characteristics, so that in-band RCS reduction is realized, normal radiation performance of the antenna is ensured, and the risk of being detected by a radar is significantly reduced.

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