T. Kagawa et al., Spatial power combining and phased-array behavior of circularly polarized active patch antennas, IEICE TR EL, E82C(7), 1999, pp. 1182-1187
Design of circularly polarized active antennas of dual-fed square patch typ
e is given, and spatial power combining and phased array operation of the a
ntennas have been successfully achieved. In a phased array experiment of th
e arrays with two and three active antennas by the method of varying their
free-running oscillation frequencies, we obtained the scan angles from -12
degrees to + 13 degrees and those from -13 degrees to + 13 degrees, respect
ively and good axial ratios together with high spatial power-combining effi
ciencies.