Reconfigurable mmWave Planar Phased Array

Abstract

This paper introduces a compact, low-profile, and pattern-reconfigurable millimeter-wave V2X antenna array. Its hybrid design, coupled with beam-scanning capabilities, facilitates extensive spatial coverage within the n257 band. By employing PIN diode-controlled strips, the antenna array achieves vertical beam tilting of up to ±40° on a vehicle with minimal gain deviation of under 1 dB. Moreover, the subarray can scan the beam within an angle of ±32° while maintaining a gain exceeding 8 dBi. The overall circular antenna array, inclusive of director and reflector elements positioned adjacent to the antenna with an added substrate, boasts dimensions of 74.2 mm×74.2 mm×2.2 mm, underscoring its compactness. Fabrication of the antenna array is carried out, and measurements encompassing beam scanning, S-parameters, and communication are conducted to confirm the simulated findings.