Work

Design and Investigation on Antipodal Vivaldi Antenna Emitting a Pulse-Like Waveform for Imaging Close-Range Objects

Year: 2024

Type: article

Abstract: This paper presents the design methodology for an antipodal Vivaldi antenna (AVA) catered to emit an impulse-like waveform, relevant for near-field imaging in impulse-radio ultra-wideband (IR-UWB) radar systems. The focus of the proposed design it to optimize the pulse response from a time-domain perspective. We have examined the radiator parameters that influence the evaluation factor, a key metric for assessing short pulse radiation performance. According to the evaluation factor, the case 3 AVA, which has parameters ofn1= 6,n2= 1,n3= 1, andn4= 709, is identified as optimal across other cases. The VSWR is below 2 from 1.8 to more than 10 GHz, which has a 5:1 bandwidth characteristic. The wireless functionality of two identical antennas of case 3 AVA is tested with antenna’s transfer function, received pulse, group delay, and realized gain for three different orientation configurations over 10 GHz. An indoor pulse radar experiment using a synthesized aperture length was conducted to capture a radar target image. Utilizing case 3 AVA, two radar targets placed 7 cm apart are accurately reconstructed. The developed case 3 of AVA is an excellent candidate for close-range area sensing and imaging applications.

Source: IEEE Access

DOI: 10.1109/access.2024.3432853

Authors: Doojin Lee, Sujith Raman, Robin Augustine

Institutions: Changwon National University, University of Twente, Uppsala University

Language: English

Topic: Antenna Design and Analysis

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,995