A compound reconfigurable microstrip antenna with agile polarizations and steerable beams

摘要

Achieving both polarization switching and beam steering independently, in a compact antenna structure, is a major challenge for compound reconfigurable antennas. In this paper, a new cavity-backed proximity-coupled reconfigurable microstrip antenna provides an efficient solution. Three different linear polarizations (0°, 45°, 90°) can be obtained by switching PIN diodes on a proximity-coupled feed network. For each polarization state, the main beam can be steered in three directions by using a reconfigurable parasitic-element network. The antenna has nine different working states in total. For all states, the measured input reflection coefficients are below -10 dB, with the measured realized gains ranging from 7.2-8 dBi.