Extremely low-profile second-order bandpass frequency selective surface using third harmonics of resonant elements



Hussein, M, Zhou, J ORCID: 0000-0002-3940-3320, Huang, Y ORCID: 0000-0001-7774-1024, Kod, M and Sohrab, AP
(2018) Extremely low-profile second-order bandpass frequency selective surface using third harmonics of resonant elements. INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, 28 (9).

[img] Text
Insensitive FSS _.pdf - Author Accepted Manuscript

Download (919kB)

Abstract

In high-order (N > 1) frequency selective surfaces (FSSs), the surfaces are usually cascaded vertically and separated by a dielectric substrate to achieve desired responses. The dielectric substrate thickness is a critical parameter in designing such structures. It is usually high for most traditional designs. In this article, we present a novel approach for designing extremely low-profile high-order bandpass FSSs. The structure is built by using the coupling of the third harmonics instead of the fundamentals of the resonators to achieve a bandpass response. By using the proposed design method, the coupling between the third harmonics can be very weak with a very thin substrate, and a flat response can be achieved. The thickness of the structure is reduced to one third in term of wavelength when compared with the structure using the fundamental mode. The overall thickness of a second-order FSS can be reduced to λ/75, where λ is the free space wavelength. A prototype of the proposed bandpass FSS is designed, fabricated, and experimentally characterized. The measurement results of this device show a very good and stable frequency response with respect to the angle of incidence up to ±45° as predicted.

Item Type: Article
Uncontrolled Keywords: Bandpass FSS, frequency selective surface, low profile, second order, third harmonics
Depositing User: Symplectic Admin
Date Deposited: 15 Jan 2019 08:09
Last Modified: 19 Jan 2023 01:06
DOI: 10.1002/mmce.21608
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3031229