Title

A Low-Profile Third-Order Bandpass Frequency Selective Surface

Keywords

Frequency selective surfaces (FSSs); Radomes; Spatial filters

Abstract

We demonstrate a new class of low-profile frequency selective surfaces (FSS) with an overall thickness of λ/24 and a third-order bandpass frequency response. The proposed FSS is a three layer structure composed of three metal layers, separated by two electrically thin dielectric substrates. Each layer is a two-dimensional periodic structure with sub-wavelength unit cell dimensions and periodicity. The unit cell of the proposed FSS is composed of a combination of resonant and non-resonant elements. It is shown that this arrangement acts as a spatial bandpass filter with a third-order bandpass response. However, unlike traditional third-order bandpass FSSs, which are usually obtained by cascading three identical first-order bandpass FSSs a quarter wavelength apart from one another and have thicknesses in the order of λ/2, the proposed structure has an extremely low profile and an overall thickness of about λ/24, making it an attractive choice for conformal FSS applications. As a result of the miniaturized unit cells and the extremely small overall thickness of the structure, the proposed FSS has a reduced sensitivity to the angle of incidence of the EM wave compared to traditional third-order frequency selective surfaces. The principles of operation along with guidelines for the design of the proposed FSS are presented in this paper. A prototype of the proposed third-order bandpass FSS is also fabricated and tested using a free space measurement system at C band. © 2009 IEEE.

Publication Date

4-28-2009

Publication Title

IEEE Transactions on Antennas and Propagation

Volume

57

Issue

2

Number of Pages

460-466

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TAP.2008.2011202

Socpus ID

65249159008 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/65249159008

This document is currently not available here.

Share

COinS