Open AccessHigh‐order bandpass frequency selective surface based on aperture‐coupled patch resonators under dual resonance
Author(s) -
Xie JinMing,
Li Bo,
Lyu YunPeng,
Zhu Lei
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2020.1910
Subject(s) - resonator , band pass filter , resonance (particle physics) , dual (grammatical number) , aperture (computer memory) , materials science , acoustics , physics , electronic engineering , optics , engineering , atomic physics , art , literature
A bandpass frequency selective surface (FSS) with fourth‐order bandpass filtering response is proposed based on aperture‐coupled patch resonators (ACPRs) under the operation of TM 010 and TM 030 resonant modes. An initial bandpass ACPRs FSS with second‐order filtering response is firstly realised by periodically arranging the back‐to‐back patch resonators with coupling apertures etched on the common ground. In order to combine the resonant modes TM 010 and TM 030 for a higher‐order filtering response, seven pairs of shorting pins are properly loaded based on the cavity model theory for the microstrip patch resonator. The loaded shorting pins make the TM 010 mode of the ACPRs shift towards the higher frequency, while the TM 030 mode keeps nearly unchanged. As a result, these two resonant modes can be allocated in proximity to each other to finally realise a fourth‐order bandpass filtering response. To validate the design concept, an FSS prototype is designed and fabricated. Reasonable agreement between the measured and simulated results validates the conceptual design.