volume | PIER Journals

Abstract

This paper proposes a single-fed wideband circularly polarized high-gain dielectric resonator antenna (DRA) for millimeter waves. By cutting out a ring slot in the upper and lower parts of the cylindrical dielectric resonator antenna, higher-order modes are excited, effectively broadening the bandwidth and enhancing the gain. To achieve circular polarization, the DRA is fed by a microstrip line through an asymmetric Z-shaped slot coupling. Measurement results show that the antenna's impedance matching S₁₁ < -10 dB bandwidth is 25.6% (35-45.31 GHz). The usable circular polarization (CP) bandwidth is found to be 8.9% (36.2-39.6 GHz), where the -10 dB input impedance bandwidth and the 3-dB axial ratio bandwidth fall within the same passband, with a maximum in-band gain of 10.67 dBi. The proposed antenna employs a single-fed technique, features a simple fabrication process, exhibits excellent performance, and is suitable for FR2 band applications.

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Dr. Wenhan Wan

Dr. Wu-Sheng Ji

Dr. Jinfeng Gan

Dr. Xing-Yong Jiang

Dr. Yun Gao