A Dual-Band Circularly Polarized Planar Monopole Antenna for WLAN/Wi-Fi Applications

作者：Tan, Ming-Tao^*; Wang, Bing-Zhong^*

来源：IEEE Antennas and Wireless Propagation Letters, 2016, 15: 670-673.

DOI：10.1109/LAWP.2015.2466596

• Circularly polarized
• dual-band
• monopole antenna

This letter presents a dual-band circularly polarized planar monopole antenna. The antenna consists of a radiator, a ground plane, and a microstrip line. The radiator is composed of a "C"-shaped strip and an "L"-shaped strip. The "C"-shaped strip is mainly used for the higher band, and the "L"-shaped strip for the lower band. The overall dimension of the prototype is only 40 x 47 x 1.5 mm(3). The proposed antenna has been built and tested. Its measured-10-dB impedance bandwidths are 380 MHz (2.32-2.70 GHz) in the lower band and 1240 MHz (4.76-6 GHz) in the higher band. Its measured 3-dBaxial-ratio (AR) bandwidths in the broadside direction are 180 MHz (2.39-2.57 GHz) in the lower band and 870 MHz (5.13-6 GHz) in the higher band. The overlapped impedance and AR bandwidths can fully cover all the 2.4/5. 2/5.8-GHz WLAN bands and all the 2.4/5.5-GHz Wi-Fi bands. The patterns have the characteristic of bidirectional radiation, and the gains are stable in both bands.

• 出版日期2016
• 单位电子科技大学