一种圆极化可重构1微带天线的设计_杨虹.pdf

32 5 Vol.32 No.5 2013 5 ELECTRONIC COMPONENTS AND MATERIALS May 2013 HFSS13.0 S11–10 dB 2.38~2.51 GHz3 dB 30 MHz 20 dB 50 ΩWLAN 2.4 GHz doi: 10.3969/j.issn.1001-2028.2013.05.010 TM277 A 100105-0034-05 Design of a circular polarization reconfigurable microstrip antenna YANG Hong, ZHOU Xiaoli, XIANG Gaolin (College of Optical and Electrical Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China) Abstract: Microstrip antenna with an arc parasitic unit was analyzed and a circular circular polarization reconfigurable microstrip antenna was designedThe arc parasitic unit was controlled by electronic switch, then this antenna realized the left and right circular polarization transformationNumerical simulation was performed for the characteristics of the antenna with the software HFSS 13.0. The results show that the frequency channels of the antenna are 2.38 2.51 GHzwhen return loss is less than –10 dBwhat’s more, 3 dB axis ratio bandwidth is 30 MHz and difference of orthogonal polarization is more than 20 dB. Moreoverthe antenna has a very well unitary radiation character and simple configuration. It is easily matched to 50 Ω in low frequency band. Besides, it can satisfy the requirements of WLAN in 2.4 GHz frequency band. Key words: microstrip antenna; circular polarization; reconfigurable antenna; resonant frequency; simulation; return loss WLAN PIN