A miniaturized frequency selective rasorber with high selectivity passband and wideband absorption properties

Abstract

A miniaturized frequency selective rasorber (FSR) with high selectivity passband and wideband absorption properties is presented. Its performance as an absorber over a wide absorption band from 8.08 to 18.08 GHz through the structure of metal incurved square loop structure loaded resistors. The frequency selective surface (FSS) using Jerusalem cross array and metallic patch realizes the transmission frequency band from 2.7 to 3.52 GHz. And the insertion loss (IL) is 0.37 dB at 3.08 GHz. The symmetry and miniaturized elements design enable the proposed FSR to achieve satisfactory incident angle stability. Its small unit size effectively avoids the generation of grating lobes in the absorption band and the interference to Radar Cross Section (RCS) reduction.

All‐Fabric Flexible Frequency‐Selective‐Rasorber Based on Cutting‐Transfer Patterning Method

“…Wideband absorbers are commonly used to realize EM protection, which has also been comprehensively investigated using the ideas of frequency selective surface (FSS), metasurface, and also novel materials. [9][10][11][12][13][14][15][16][17] EM protection products using these methods have been gradually commercialized due to the relatively simple structures.However, the lack of frequency-selective property makes it impossible for these methods to transmit useful electromagnetic signals while realizing EM protection. For instance, for military applications, the communication signal of an antenna or radar should be able to pass through the radome while the waves at adjacent bands should be absorbed to reduce the total RCS.…”

“…Wideband absorbers are commonly used to realize EM protection, which has also been comprehensively investigated using the ideas of frequency selective surface (FSS), metasurface, and also novel materials. [9][10][11][12][13][14][15][16][17] EM protection products using these methods have been gradually commercialized due to the relatively simple structures.…”