Design of Switchable Frequency-Selective Rasorber With A-R-A-T or A-T-A-R Operating Modes
Kong Xiang, Xin Jin, Xuemeng Wang, Weihao Lin, He Wang, Zuwei Cao, Steven Gao
Abstract
This letter presents a switchable frequency-selective rasorber (SFSR) with two operating modes. Switching from transmission to reflection can be achieved by appropriately adding feeders and PIN diodes based on cascaded two-dimensional lossy and lossless frequency-selective surface screens. The proposed SFSR can realize out-of-band absorption. Analysis of the equivalent circuit model can be useful for achieving a switchable rasorber. As the state of the PIN diodes changes, the working state of the SFSR can be switched from low-frequency reflection and high-frequency transmission to low-frequency transmission and high-frequency reflection, respectively. In the final-revision simulation of the working band of the SFSR, in the <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">on</small> state, reflection and transmission peaks of −0.55 dB at 4.06 GHz and −0.52 dB at 5.97 GHz, respectively, are achieved; in the <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">off</small> state, the transmission and reflection peaks of −0.31 dB at 4.04 GHz and −0.26 dB at 6.01 GHz, respectively, are obtained. A prototype sample is developed and validated. The results are in good agreement with those of the final-revision simulations. The proposed design can be used in intelligent antijamming communication.