volume | PIER Journals

Abstract

With the advancement of millimeter wave communication technology, reconfigurable antennas have garnered significant attention due to their adaptability. However, their radiation gain and sidelobe suppression performance are often constrained by factors such as diode package size and array scale. To address these challenges, this paper proposes a three-state frequency reconfigurable array antenna with high gain and low sidelobe characteristics, specifically designed to meet the demands of millimeter-wave communication. By optimizing the feed network and radiating element design, the proposed antenna achieves enhanced gain and improved sidelobe suppression. The design employs a dual-port feeding architecture that integrates a Taylor non-uniform amplitude distribution with a series-parallel hybrid feed network. This configuration ensures phase consistency while minimizing the number of diodes to just four, significantly reducing insertion loss and structural complexity. The antenna prototype is fabricated using standard printed circuit board (PCB) technology, with overall dimensions of 60.4 × 63 × 0.508 mm³. Measurement results indicate that the antenna exhibits an impedance bandwidth spanning from 27.5 GHz to 28.5 GHz and from 34.5 GHz to 35.5 GHz. The corresponding peak gains are 19.69 dBi and 19.51 dBi, with the sidelobe levels of are 18.93 dB and 18.03 dB respectively. The proposed antenna demonstrates excellent radiation characteristics and significantly enhanced radiation efficiency. With its simple structure, dual-band radiation capability, high gain, and low sidelobe levels, this antenna is highly suitable for millimeter-wave wireless communication systems. It offers a high-performance solution for multi-band communication in 5G/6G networks.

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Dr. Mingming Gao

Dr. Hang Yuan

Dr. Jingchang Nan

Dr. Hongliang Niu

Mr. Chang Ge