Broadband absorption structure with independently adjustable polarization of transmission frequency

Abstract

This invention discloses a broadband absorption structure with independently adjustable polarization frequency, belonging to the field of frequency-selective absorber technology. The structure comprises six alternating layers of ideal conductor PEC frequency-selective surfaces and three layers of F4B dielectric substrate. The frequency-selective surfaces are divided into lossy and lossless arrays. Both types of arrays consist of two orthogonal sublayers arranged in the same manner. All sublayers are printed on the dielectric substrate and isolated from each other by air layers. Both the lossy and lossless arrays integrate varactor diodes for independently controlling the transmission windows of TE-polarized and TM-polarized incident waves. This invention achieves true independent polarization frequency modulation, overcoming the shortcomings of traditional structures that cannot achieve independent polarization characteristics. It allows independent adjustment of the transmission frequencies of TE and TM polarizations without affecting the transmission and control response of cross-polarized waves.

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