Narrowband Bandpass Frequency Selective Surface with Miniaturized Elements

TL;DR

This paper introduces a narrowband bandpass frequency selective surface (FSS) with miniaturized elements, controllable bandwidth, and verified higher-order filtering capabilities at 2.7 GHz.

Contribution

It presents a novel miniaturized element FSS with a circuit model for bandwidth control and demonstrates higher-order filtering design.

Findings

Achieved 8.5% fractional bandwidth at 2.7 GHz

Validated the design's compatibility with higher-order responses

Provided an equivalent circuit model for FSS analysis

Abstract

This article presents a bandpass frequency selective surface (FSS) with a narrowband frequency response. The designed FSS is made of miniaturized elements unit cell. The operation principle of the FSS is explained by using an equivalent circuit model, where the passband bandwidth can be controlled by the values of the circuit elements corresponding to the geometrical dimensions of the unit cell. The compatibility of the presented structure in designing higher order narrowband filtering responses is verified by designing a second-order bandpass FSS with 8:5% fractional bandwidth with a center frequency of 2:7 GHz.