Stripline- Based W- Band Frequency Scanning Composite Right/Left-Handed Leaky-Wave Antenna with a Tapered Aperture for Narrow Beamwidth

A stripline-based composite right/left-handed (CRLH) leaky-wave antenna (LWA) with a tapered aperture is designed for an increased effective aperture size. Experimental results show that the CRLH LWA is able to scan from −33° to 25.5° by sweeping the frequency from 76.75 GHz to 83 GHz, with a half-nower heamwidth (HPRW) of less than 5°.