A Compact Independent Dual-Polarized 2-Bit Phased-Array Antenna

Abstract

In this letter, we introduce a low-cost, independently dual-polarized electronically scanned array. It incorporates two orthogonal microstrip dipoles with miniaturized cascaded 90$^\circ$ phase shifter to achieve a dual-channel configuration, which improves the capabilities of antenna. By manipulating the states of p-i-n diodes, it becomes possible to precisely control over the radiation patterns. A 2-D planar array consisting of 64 active elements operating at a working frequency from 4.8 GHz to 4.9 GHz is fabricated and measured. Shared 2-bit phase control allows for the simultaneous steering of dual-polarized beams in the same direction. This array provides a wide range of beam scanning within $\pm {\text{45}}^\circ$ allowing for the implementation of scannable beams. The measured results agree well with the simulation ones, demonstrating the excellent scanning performance of the antenna array.