Experimental demonstration of double-negative metamaterials partially filled in a circular waveguide

Abstract

We have studied a new type of double-negative metamate-rials (DNMs) composed of split ring resonators (SRRs) and wire strips with substrate Teflon, suitable for generation of reversed Cherenkov radiation (RCR) which is TM radiation. We have experimentally observed a narrow pass band in a circular waveguide partially loaded with the DNMs and stop bands for SRRs-only with Teflon and for wire strips-only with Teflon, respectively. The experimental data show that the DNMs exhibit double-negative behavior over a frequency band of interest. This study provides a foundation for future experiment to observe RCR emitted by charged particles.