Electronically steerable Yagi-Uda microstrip patch antenna array.” Antennas and Propagation

Abstract — This paper describes a dual-frequency circularly polarized electronically steerable microstrip patch antenna ar-ray suitable for land-mobile communications. Based on a four-element Yagi-Uda patch antenna, the four antennas forming the array are located radially from a single square reflector patch on a double-sided printed circuit board. The main lobe of the array covers the elevation angles from 20 to 70 with a peak gain of 8.4 dBi at 1.54 GHz and 11.7 dBi at 1.62 GHz. Full azimuthal coverage is possible by electronically switching between the four elements. Index Terms—Antenna arrays, microstrip antennas, Yagi-Uda arrays. I