Dual‐polarized frequency selective absorber with in‐band reflection response

Abstract

This paper proposes a frequency selective absorber with a notch reflection band. It consists of a lossy layer and a metal ground. The lossy layer is composed of the octagonal ring and meander‐line resonators connected in parallel on the same plane, which are used to obtain a wide absorption band and a notch reflection band, respectively. The simulation results show that there are two absorption bands from 2.22 to 6.8 GHz and 7.94 to 8.54 GHz, and there is a −3dB reflection band from 7.14 to 7.68 GHz. Moreover, the absorber also has the characteristics of compact structure, polarization‐independent, and angular stability. The equivalent circuit has been established and explained the performance of the proposed band‐notched absorber. The proposed band‐notched absorber is manufactured and measured, and the results are generally in good agreement with the full‐wave simulation results.

Design of a multilayer ultra‐wideband absorber based on hybrid absorption structure

“…In recent years, research on absorbers has started to focus more on multiband absorbers and study dual-band, 8,9 three-band, 10 and four-band 11 polarization-insensitive absorber with switchable absorption bands is presented in Ghosh and Srivastavan 12 by using a diode. To achieve the tunability of the three-band absorbing wave, a varactor is added to the design of the absorbing body in Li et al 13 However, multiband absorbers often do not have a wide absorption bandwidth.…”

“…In recent years, research on absorbers has started to focus more on multiband absorbers and study dual‐band, 8,9 three‐band, 10 and four‐band 11 absorbers. The multiband absorber uses a two‐stage tube.…”