Abstract

Frequency selective surfaces (FSSs) are periodic arrays of conductive elements that act as spatial filters of electromagnetic energy. FSSs have found recent application as sensors, filters, reflectors and radomes, amongst others. Often miniaturization techniques are used to improve the stability of the FSS to incident angle (of the excitation). However, due to the type of coupling (internal/self-vs. external/mutual with adjacent elements), some designs are more responsive to miniaturization techniques than others. Hence, this paper quantifies the effect of the ratios of inter-element spacing-to-substrate thickness (S/h) and side length-to-substrate thickness (SL/h) on fringing fields (and hence coupling and potential for miniaturization) of a loop-based FSS. To do this, the effective perimeter and electrical periodicity of the loop (resulting from fringing fields) is calculated based on the effective permittivity of the substrate and the resonant frequency for various substrate thicknesses. The results indicate that external coupling (with adjacent elements) dominates when S/h is less than SL/h and hence such designs are more receptive to miniaturization techniques.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

effective perimeter; frequency selective surfaces; fringing fields; loop design; miniaturization

International Standard Book Number (ISBN)

978-172814670-6

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.

Publication Date

01 Jan 2021

Download

Full Text Link

Share

 
COinS