Design of frequency selective rasorber with high in-band transmission and wideband absorption properties

Abstract

A low-frequency transmissive frequency selective rasorber (FSR) with high in-band transmission and wideband absorption characteristics is proposed and experimentally demonstrated. It comprises the top resistive sheet and the bottom bandpass FSS. For resistive sheet, the tiny strip-type parallel LC resonator composed of square spiral inductor and its two-sided capacitors is inserted between the resistor-loaded crosses to achieve lower insertion loss (IL) by cutting off the lossy path. The bandpass FSS with high selectivity consists of Jerusalem cross slot array and capacitive metallic patches. An IL of 0.3 dB is obtained at 3.55 GHz, and the 10-dB-absorption band is 5.4-13.2 GHz.

Frequency selective rasorber based on cross bend resonators for wideband transmission and absorption

“…As h increases, the reflection amplitude first decreases and then increases. According to [45], it is usually set as a quarter of wavelength corresponding to the center frequency of the absorption band (around 9 GHz in this letter), Considering the effects of the thin dielectric substrate below the resistive sheet, h is finally optimized to be 6.25 mm.…”

Broadband-Transmissive, Frequency-Selective Rasorber Design Using Characteristic Mode Analysis

“…In recent decades, some FSRs have been widely proposed and published [5][6][7][8][9][10]. Existing FSRs can generally be classified into three categories based on the relative positions of the transmission window and absorption bands: (1) the transmission window below an absorption band (TA-FSR) [5,6], (2) the transmission window above the absorption band (AT-FSR) [7,8], and (3) the transmission window within the absorption bands (ATA-FSR) [9,10]. However, in the previous literature, a common feature of FSRs is that they are narrow transmission windows.…”

A high-integration on-chip reconfigurable monopole

“…Nowadays, with the rapid development of wireless communications, the conventional antenna system which realized a single radiation performance can't satisfy the requirements of communications [1][2][3][4][5]. To improve the integration of antenna system and reduce the system complexity, frequency reconfigurable antennas which have different standards or multi-frequency applications within a single antenna system have been attracting more and more attentions of many researchers.…”

“…The size of this filter is designed according to the operating frequency of the reconfigurable monopole, and it can be designed together with the monopole within a single silicon system. Therefore, these high integrated antennas with band stop filters are more suitable for modern communication systems [27][28][29][30][31]. The operating principle and structure model of the monopole antenna are discussed in section 2.…”