Summary
International Symposium on Antennas and Propagation
2012
Session Number:1D3
Session:
Number:1D3-2
A High-gain Beam-steering Quasi-Yagi Antenna
Peiyuan Qin,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
A high-gain beam-steering pattern reconfigurable quasi-Yagi dipole antenna is proposed for WLAN applications. The maximum beam direction in E plane can be switched towards 20°, 0°, and -20° with respect to the end-fire direction, by changing the length of the microstrip-to-coplanar-strip (CPS) balun. Specifically, the length of the balun affects the phase difference of the currents on the two arms of the dipole. Different phase differences of the currents will lead to different main beam directions. The simulated -10 dB overlapped impedance bandwidth is 11.5% centred at 5.3 GHz and the realized gain is 10.7 dBi. Compared to most of the reported beam-steering antennas, the proposed design has a much larger impedance bandwidth and a much higher gain.