Super Wideband Antipodal Vivaldi Antenna for Through-Wall Radar Applications
Year: 2026
Type: conference-paper
Abstract: This paper presents a super-wide band compact antipodal Vivaldi antenna for through-wall radar applications. The proposed structure consists of an elliptical director located near the feed point, two radiating arms with circular corrugations on their lower edges, and a serrated ground plane. The utilized elliptical radiator enhances directivity, gain and stability. Additionally, symmetrical circular slots are included on the bottom edges of both radiators to enhance impedance matching and bandwidth. Simulation results show an impedance bandwidth$(\left\vert \boldsymbol{S}_{\mathbf{1 1}}\right\vert \leq-\mathbf{1 0} \mathbf{~ d B})$of 47 GHz from 3 to 50 GHz, corresponding to a fractional bandwidth of 177.36%. The proposed antenna exhibits a peak gain of 5.2 dBi with stable radiation patterns, an acceptable group delay ($\left\vert \boldsymbol{S}_{\mathbf{1 1}}\right\vert \leq-\mathbf{1 0} \mathbf{~ d B}$within 1-30 GHz band, and when placed near walls of varying thicknesses up to 150 mm, confirming its practical viability for real-world through-wall radar applications. The results demonstrate the antenna's suitability for remote sensing and through-wall radar applications.
Authors: Wasan Alamro, Boon-Chong Seet
Language: English
Topic: Antenna Design and Analysis
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7202289902