Miniaturized Antipodal Vivaldi Antenna with Resistance-based Tapered
Radiator for Near-Distance Radar Imaging
Abstract
This Letter presents the creation, examination, and properties of a
compact short pulse radar antenna for close-range pulsed radar imaging
applications. We conducted an in-depth study on the antipodal Vivaldi
antenna by varying the slope of its exponentially tapered radiating
element and meticulously analyzed the resulting pulse response in the
time domain. To determine the most effective design, we introduce an
evaluation criterion (EC). Utilizing this EC, Case3 exhibits the best
performance from a time domain perspective, with parameters of
n_1,n_(2,) n_3,and n_4 are 4,1,1,9, respectively. Additionally, we
introduce a resistance-tapered Vivaldi antenna designed through an
innovative formula. This leads to a size reduction of approximately 50%
compared to conventional antennas of equivalent length.