Waveguide Bandpass Filters made of Thick Complementary Small Resonators

TL;DR

This paper presents a novel approach to designing ultra-compact waveguide bandpass filters using complementary small resonators, simplifying the design process and enabling miniaturization.

Contribution

It introduces a new waveguide model that reduces reliance on full wave simulations, facilitating the design of miniaturized filters with minimal length.

Findings

Experimental and computational validation of passband response.

Design process significantly simplified by the new model.

Achieved filter lengths equal to metallic sheet thickness.

Abstract

We explore the potential use of complementary split ring resonators (csrr's) and complementary spirals of two and three turns (csr2 and csr3) to design very compact waveguide filters. We demonstrate its passband response in an experimental and computational form. Besides, it is shown that the design process can be highly simplified by means of a new waveguide model that reduce full wave numerical simulations. Thus, it is possible to design waveguide filters with lengths equal to the thickness of a metallic sheets, leading to an improvement in the design of miniaturized waveguide filters.