期刊
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
卷 28, 期 3, 页码 200-202出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2018.2798166
关键词
Angular insensitivity; bandpass filter; frequency-selective surface (FSS); low profile; polarization independence
资金
- National Natural Science Foundation of China [61601360, 61501365, 61471292, 61471388, 61331005, 41390454, 41404095]
- China Postdoctoral Science Foundation [2015M580849]
- Natural Science Basic Research Plan in Shaanxi Province of China [2015JM6284]
In this letter, a low-profile bandpass frequency-selective surface (FSS) that is independent of incident angle and polarization is proposed. This FSS is composed of two identical metallic convoluted cross slot layers with vertical metal vias. The whole structure is ultrathin with a thickness of 0.042 lambda, where lambda represents the resonant wavelength in free space. This FSS works as a spatial bandpass filter and exhibits great resonant stability with incident angle ranging from 0 degrees (normal incident) to 75 degrees for both transverse electric (TE) and transverse magnetic (TM) polarizations. At 75 degrees oblique incidence, the resonant frequency deviation is about 0% and 2.02% for TE and TM polarizations, respectively. To verify the design, a prototype of the FSS was fabricated. The measured transmission responses agree reasonably with that of the simulated ones.
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