volume | PIER Journals

Abstract

A circularly polarized (CP) millimeter-wave phased array antenna (PAA) is proposed for wide-angle scanning applications. The antenna is composed of radiating patches, coupling patches, and a ground plane. A single element consists of a centrally fed microstrip CP antenna with double arc-shaped slots, with a parasitic patch loaded on its top. A sequentially fed 2 × 2 subarray is constructed by arranging single elements in a specific orientation, and the central disc-ring structure is combined with the square ring patch structure based on the beam complementarity principle to broaden the beamwidth. Both simulations and measurements are performed on a 4 × 4 prototype array. The proposed antenna operates over a frequency band of 27.6-30.4 GHz, 3 dB AR bandwidth covers working bandwidth. When the beam scans to ±60°, the gain degradation relative to the boresight direction is only 1.1 dB, with the AR at the beam pointing angle maintained ≤3.5 dB. The proposed antenna boasts a compact size, facile fabrication process, and excellent wide-angle scanning capability, and it provides a novel design paradigm and practical solution for CP millimeter-wave wide-angle scanning PAA systems.

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Dr. Chang Su

Dr. Longchao Huang

Dr. Xiaojie Yang

Professor Jiade Yuan