Design of Dual-Band Frequency-Selective Rasorber

A novel frequency-selective rasorber (FSR) with dual-band transmission and wideband absorption property is proposed in this letter. The FSR is a two-layer structure composed of a lossy resistive sheet at the top and a lossless bandpass frequency-selective surface (FSS) at the bottom, separated by an air spacer. The element of the resistive sheet is a lumped-resistor-loaded metallic dipole with a dual-resonance structure inserted in the center. The dual-resonance structure is realized by three different series LC structures in parallel, based on the Foster reactance theorem. There are two impedance poles between the three impedance zeros of the series LC circuits, where two transparent windows can be obtained for the lossy resistive sheet. The bandpass FSS is a simple dual-band FSS by etching two slots with different shapes and dimensions in a metallic plane. The FSR has realized two transmission bands at 7.7 and 12.6 GHz, and the band with |S11| < −10 dB is 3.7–11.1 GHz. The design has been validated by full-wave simulation and experimental measurement.

[1]  Min Guo,et al.  Frequency-Selective Rasorber With Interabsorption Band Transparent Window and Interdigital Resonator , 2018, IEEE Transactions on Antennas and Propagation.

[2]  Ben A. Munk,et al.  Frequency Selective Surfaces: Theory and Design , 2000 .

[3]  Wen Jiang,et al.  Design Bandpass Frequency Selective Surface Absorber Using LC Resonators , 2017, IEEE Antennas and Wireless Propagation Letters.

[4]  Ye Han,et al.  Switchable Low-Profile Broadband Frequency-Selective Rasorber/Absorber Based on Slot Arrays , 2017, IEEE Transactions on Antennas and Propagation.

[5]  Debasis Mitra,et al.  A Frequency Selective Surface Based Reconfigurable Rasorber With Switchable Transmission/Reflection Band , 2019, IEEE Antennas and Wireless Propagation Letters.

[6]  R. M. Foster,et al.  A reactance theorem , 1924 .

[7]  Huanhuan Yang,et al.  Wideband Gain Enhancement and RCS Reduction of Fabry–Perot Resonator Antenna With Chessboard Arranged Metamaterial Superstrate , 2018, IEEE Transactions on Antennas and Propagation.

[8]  Kuo-Sheng Chin,et al.  A Low-Profile Frequency Selective Surface With Controllable Triband Characteristics , 2013, IEEE Antennas and Wireless Propagation Letters.

[9]  Min Guo,et al.  Miniaturized Frequency-Selective Rasorber With a Wide Transmission Band Using Circular Spiral Resonator , 2019, IEEE Transactions on Antennas and Propagation.

[10]  Nader Behdad,et al.  A Dual-Band, Inductively Coupled Miniaturized-Element Frequency Selective Surface With Higher Order Bandpass Response , 2016, IEEE Transactions on Antennas and Propagation.

[11]  Yunqi Fu,et al.  A Miniaturized Absorptive Frequency Selective Surface , 2015, IEEE Antennas and Wireless Propagation Letters.

[12]  Yunqi Fu,et al.  Absorptive frequency selective surface using parallel LC resonance , 2016 .

[13]  B. A. Munk.  Metamaterials: Critique and Alternatives , 2009 .

[14]  Liu Li-guo,et al.  Design of an Invisible Radome by Frequency Selective Surfaces Loaded with Lumped Resistors , 2013 .

[15]  Zhongxiang Shen,et al.  Dual-Polarized Band-Absorptive Frequency Selective Rasorber Using Meander-Line and Lumped Resistors , 2019, IEEE Transactions on Antennas and Propagation.

[16]  Zhongxiang Shen,et al.  Wideband 3D Frequency Selective Rasorber , 2014, IEEE Transactions on Antennas and Propagation.

[17]  Zhongxiang Shen,et al.  Absorptive Frequency-Selective Transmission Structure With Square-Loop Hybrid Resonator , 2017, IEEE Antennas and Wireless Propagation Letters.

[18]  Yunqi Fu,et al.  Design of Absorptive/Transmissive Frequency-Selective Surface Based on Parallel Resonance , 2017, IEEE Transactions on Antennas and Propagation.

[19]  Shaoqiu Xiao,et al.  Frequency-Selective Rasorber Based on Square-Loop and Cross-Dipole Arrays , 2014, IEEE Transactions on Antennas and Propagation.

[20]  Shaoqiu Xiao,et al.  On the Design of Single-Layer Circuit Analog Absorber Using Double-Square-Loop Array , 2013, IEEE Transactions on Antennas and Propagation.

[21]  F. Costa,et al.  A Frequency Selective Radome With Wideband Absorbing Properties , 2012, IEEE Transactions on Antennas and Propagation.

[22]  I. Bahl.  Lumped Elements for RF and Microwave Circuits , 2003 .