International Symposium on Antennas and Propagation
A Small Steerable-Beam Antenna
H. Nakano, H. Honma, H. Umetsu, J. Yamauchi,
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A round driven patch surrounded by four parasitic T elements is investigated to realize a steerable beam. The steered beam is obtained by selecting the connection state of the T elements (either open-circuited or short-circuited) to the ground plane. Eight connection states for the T elements are analyzed. It is found that the radiation beam is steerable in eight azimuthal directions (φ = 0? , 45? , 90? , 135? , 180? , 225? , 270? , and 315? ). The VSWR is less than 2 for all eight states. The directivity in the maximum beam direction is approximately 8 dB.