volume | PIER Journals

Abstract

A directional circularly polarized dielectric resonator antenna for different main-beam angles is designed using the Particle Swarm Optimization (PSO) method. It is a single-feed, single-layer structure. For demonstration, the main-beam angle θ is designed at 30° and a 5G frequency of 5.8 GHz. To verify our design, a prototype is fabricated using 3D-printing technology. Its reflection coefficient, radiation pattern, realized gain, and total antenna efficiency are measured. Measured results show good agreement with simulated ones. The prototype has a -10 dB impedance bandwidth of 37.24% (4.84-7 GHz), a 3-dB axial ratio bandwidth of 15.52% (5.3-6.2 GHz), a peak gain of 5.87 dBi, and a peak total antenna efficiency of 96%. It has a low profile of 0.2λ₀, where λ₀ is the free-space wavelength at 5.8 GHz.

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Ms. Qiheng Huang

Professor Kwok Leung