A dual-band rectangular dielectric resonator antenna (RDRA) is designed to resonate at frequencies 28.7GHz and 33GHz with a realized gain of 5dBi and 10.3dBi respectively. A high gain is achieved at 33GHz. The RDRA is excited by a rectangular aperture. The efficiency of the RDRA is more than $80 %$. The proposed antenna is a simple structure and can be used for millimeter Wave 5G applications.
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Usha et al. (2024) studied this question.
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