A Fixed-Frequency Beam Scanning Circularly Polarized Leaky-Wave Antenna Based on Half-Mode Substrate Integrated Waveguide
Journal
2025 19th European Conference on Antennas and Propagation (EuCAP)
Start Page
1-4
Date Issued
2025-03-30
Author(s)
Abstract
This paper presents a novel circularly polarized (CP) leaky-wave antenna utilizing a half-mode substrate integrated waveguide structure for continuous beam scanning at a fixed frequency of 10 GHz. By employing a modified unit cell equipped with two varactors, the antenna enables continuous beam scanning at a predetermined frequency from backward (-30°) to forward (+32°) directions, including broadside (0°). Simulation and experimental results demonstrate good agreement, with | S11| below -10 dB and axial ratio under 3 dB across main beam directions. The prototype antenna achieves a peak gain of 10.4 dBic at broadside and exhibits a gain variation of less than 2.6 dB during beam scanning. Its compact size and stable performance make it suitable for radar systems requiring CP beam scanning at fixed frequencies.
SDGs
Publisher
IEEE
Type
conference proceedings