One dimensional capacitive loading in a frequency selective surface for low profile antenna applications

Abstract

Abstract-In this paper, the impact of adding discrete capacitive loading along one dimension of a frequency selective surface for low profile antenna applications is presented for the first time. The measured data demonstrates comparable performance between a non-loaded and a capacitively-loaded FSS with a significant reduction in the number of cells and/or cell geometry size. Additionally, the provision of discrete capacitive loads reduces the FSS susceptibility to fabrication tolerances based on placement of a fixed grid capacitance. The bandwidth increased from 1.8% to 7.3% for a total antenna thickness of ~λ/22, and from 1.5% to 9.2% for a thickness of ~λ/40. The total antenna area for each case was reduced by 55% and 12%, respectively.

Non-uniform bias enhancement of a varactor-tuned FSS used with a low profile 2.4 GHz dipole antenna

“…1). This work builds upon the design presented by Cure, et al [1] with the goal of achieving broad tunable bandwidths. The antenna has a total thickness (excluding the feed layer) of ~λ/45 at the center of the operating band.…”