Work

Full-metal millimeter-wave filtering frequency-scanning leaky-wave antenna based on spoof surface plasmon polaritons

Year: 2025

Type: article

Abstract: This paper introduces a full-metal millimeter-wave leaky-wave antenna (LWA) with filtering response and enhanced frequency-scanning capabilities. The proposed LWA is constituted of a transmission line and a radiator array. The transmission line achieves an integrated filtering function by incorporating spoof surface plasmon polariton (SSPP) blocks within a double-grating waveguide (DGWG). A modified magnetoelectric (ME) dipole is tailored as the radiator unit to suppress the open-stopband (OSB) effect and enable wide-angle beam scanning. For experimental verification, a final prototype is fabricated and measured. The proposed design demonstrates well impedance matching and efficient radiation across the 23.8-33.8 GHz. The beam scanning range spans from -71° to 19°. Within the operating band, the peak gain is about 16.2 dBi, and the total efficiency is above 77%. Beyond the operating bandwidth, the realized gain is reduced by more than 18.5 dB. The proposed filtering LWA holds significant characteristics on wide-angle beam scanning, high efficiency, and excellent frequency selectivity.

Source: Optics Express

DOI: 10.1364/oe.568079

Authors: Yaxin Wen, Jianxing Li, Sifan Wu, Sen Yan, Kai-Da Xu, Juan Chen

Language: English

Topic: Microwave Engineering and Waveguides

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: National Key Research and Development Program of China

Award: G1606072481