Abstract
A novel low-profile dual-polarization frequency-selective rasorber (FSR) with a transmissive window in the absorption band is proposed in this paper. Based on the equivalent circuit model (ECM), the principles of the impedance design are theoretically derived. Then, a two-layer structure model is constructed. The top layer is composed of a lossy three-legged loaded element (TLLE), and the bottom layer is composed of a square ring bandpass frequency-selective surface (FSS). Furthermore, the strips are folded to reduce the unit cell size to stabilize the angular response. The maximum stable response angle increases from 20 to 40° due to the miniaturized design under both TE and TM polarization. The experimental results of the prototype are in good agreement with the simulation results, which validates the rationality of our design.
Highlights
Frequency-selective surface (FSS), regarded as a spatial filter within a certain bandwidth of the resonant frequency corresponding to the periodic unit cell, has been applied in hybrid radomes to transmit the in-band waves and simultaneously reflect the out-of-band waves [1]. e antenna radar cross section (RCS) could be reduced by its frequency selectivity together with a proper shape [2,3,4]
Several research and applications of 2-D frequency-selective rasorber (FSR) have been studied in the recent few years [5,6,7,8,9,10,11,12,13,14,15,16]. ese FSRs are usually composed of a lossy layer and a metallic lossless bandpass FSS layer. e lossy layer can be implemented by two methods: magnetic loss material [8] and metallic element loaded with lumped resistors [5,6,7, 9,10,11,12,13,14,15,16]. us, the transmission band can be realized by the resonance of the lossy layer and the lossless layer, while the lossy layer is used to achieve absorption characteristics
Erefore, compared with the proposed complex structures, a more simple but stable structure by cascading a three-legged loaded element (TLLE) layer and a square ring bandpass FSS layer is proposed in this paper. is paper first elaborates the design principles of the absorption band and passband through the equivalent circuit model (ECM). e simulation results of preliminary design in the HFSS agree
Summary
Frequency-selective surface (FSS), regarded as a spatial filter within a certain bandwidth of the resonant frequency corresponding to the periodic unit cell, has been applied in hybrid radomes to transmit the in-band waves and simultaneously reflect the out-of-band waves [1]. e antenna radar cross section (RCS) could be reduced by its frequency selectivity together with a proper shape [2,3,4]. E antenna radar cross section (RCS) could be reduced by its frequency selectivity together with a proper shape [2,3,4]. Ese FSRs are usually composed of a lossy layer and a metallic lossless bandpass FSS layer. Two sets of LC resonators were loaded on metal cross grids in [14] In these two methods, loading too many elements leads to a complex structure. Erefore, compared with the proposed complex structures, a more simple but stable structure by cascading a three-legged loaded element (TLLE) layer and a square ring bandpass FSS layer is proposed in this paper. The prototype is fabricated and the experimental results are basically consistent with the simulation results
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
