Journal
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
Volume 61, Issue 4, Pages 1234-1238Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TEMC.2018.2881161
Keywords
Convoluted element; frequency selective surfaces (FSSs); miniaturization; spatial filters; 2.5-D structure
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In this study, an ultra-miniaturized low-profile angularly-stable frequency selective surface (FSS) based on 2.5-dimension convoluted interwoven element is designed. The dimension of FSS element is 0.014 lambda(0) x 0.014 lambda(0), where the lambda(0) represents the free-space wavelength of resonance frequency. The thickness is only 0.0015 lambda(0). When the FSS is illuminated by electromagnetic wave, the frequency selective properties perform stable under different incident angles up to 85 degrees for both TE and TM polarization. For better understanding, the operation mechanism, the design procedure, distribution of surface current, and equivalent circuit are presented. A prototype of proposed FSS is fabricated, the measurement results prove the validity of simulated ones. To further improve the performance, using the same design procedure, the size and thickness of designed FSS have been reduced to 0.0053 lambda(0) x 0.0053 lambda(0) and 0.00061 lambda(0), respectively. Since the resonance frequency of proposed FSS is adjustable at any desired frequency, an ultra-miniaturized low-profile angularly-stable FSS for GSM 900 band has been designed. The designed FSS can be applied in GSM shielding effectively.
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