A Small-Size Dual-Feed Broadband Circularly Polarized U-Slot Patch Antenna

作者：He, Mang^*; Ye, Xihong; Zhou, Pingyuan; Zhao, Guoqiang; Zhang, Chuanfang; Sun, Houjun

来源：IEEE Antennas and Wireless Propagation Letters, 2015, 14: 898-901.

DOI：10.1109/LAWP.2014.2384496

• Broadband
• circular polarization
• small size
• U-slot patch patch antenna

A small-size broadband circularly polarized U-slot patch antenna with dual-feed is proposed. By introducing an additional feeding probe near the vertical slot of the conventional singly fed square U-slot patch antenna printed on a high-permittivity substrate, two series resonances in close proximity are excited. The two resonant frequencies are found to be independent of the orientation of U-slot with respect to the patch, and broadband circular polarization is achieved by introducing a nonquadrature phase difference between two feeding ports. Experimental results show that the overlapped bandwidth of VSWR <= 1.5 and AR <= 3 dB is over 20% with a small overall size of 0.33 lambda(0) x 0.33 lambda(0) x 0.068 lambda(0), where lambda(0) is the free-space wavelength at the center frequency within the operating band.

• 出版日期2015
• 单位北京理工大学