2012 Volume E95.B Issue 1 Pages 106-108
A feed-point-selective, asymmetrically fed dipole antenna has been proposed for multiple-input multiple-output (MIMO) applications. By using PIN diode switches, an asymmetrical antenna feed is realized so as to control antenna directivities. The two basic requirements for MIMO antenna radiation patterns, namely, a decrease in overlap and control in direction, have been achieved. Additionally, to enhance directivities for the antenna with PIN diodes, a reflector has been introduced. The gain toward the reflector decreased by 2dB, while the gain in the direction of the maximum gain increased by 2dB. The developed antenna can correspond to a variable power angular spectrum (PAS).