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A High-Gain Broadband Circularly Polarized Crossed Dipole Antenna
Version 1
: Received: 17 July 2024 / Approved: 17 July 2024 / Online: 17 July 2024 (12:45:20 CEST)
How to cite: Liao, C.; Liu, W.; Lin, X. A High-Gain Broadband Circularly Polarized Crossed Dipole Antenna. Preprints 2024, 2024071409. https://doi.org/10.20944/preprints202407.1409.v1 Liao, C.; Liu, W.; Lin, X. A High-Gain Broadband Circularly Polarized Crossed Dipole Antenna. Preprints 2024, 2024071409. https://doi.org/10.20944/preprints202407.1409.v1
Abstract
A high-gain broadband circularly polarized crossed dipole antenna is designed. This antenna utilizes two pairs of cross dipoles and a pair of phase delay lines to form circularly polarized radiation. Open-circuit stubs are loaded on the four arms of these two pairs of cross dipoles to introduce new circularly polarized resonating frequency. A rectangular ring patch is introduced directly below the cross dipoles to form the third circularly polarized resonating frequency, thereby broadening the axial ratio bandwidth of the antenna. In addition, metal posts are loaded at the four right angles of the rectangular ring patch to increase the antenna gain. Measurement results show that the antenna achieves a 3dB axial ratio bandwidth of 29.2% (1.9 GHz-2.55 GHz) and maintains a gain of 7.5 dB within the passband, exhibiting good circularly polarized radiation performance.
Keywords
circular polarization; cross dipole; high gain; wide axial ratio bandwidth
Subject
Physical Sciences, Radiation and Radiography
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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