A Wide-Angle and Circularly Polarized Beam-Scanning Antenna Based on Microstrip Spoof Surface Plasmon Polariton Transmission Line

作者：Guan, Dong Fang; You, Peng^*; Zhang, Qingfeng^*; Lu, Zhong Hao; Yong, Shao Wei; Xiao, Ke

来源：IEEE Antennas and Wireless Propagation Letters, 2017, 16: 2538-2541.

DOI：10.1109/LAWP.2017.2731877

• Beam-scanning antenna
• circular polarization (CP)
• surface plasmon polariton (SPP)
• wide angle

In this letter, a wide-angle beam-scanning antenna with circular polarization (CP) characteristic is proposed. The antenna consists of two layers. Microstrip spoof surface plasmon polariton (SPP) is introduced on the bottom layer as a slow-wave feeding line. A series of circular patches are placed on the top layer as radiating elements. Simulated and measured results indicate that beam-scanning angle of the proposed antenna is improved and CP beam-scanning ability is obtained by introducing perturbation on the radiating elements. In the operating band of 11-15 GHz, measured scanning angle of the fabricated antenna is from -32 degrees to + 34 degrees. The antenna axial ratio (AR) is below 3 dB at the corresponding beam direction, and gain is above 12.8 dBi over the whole band. It has potential applications in radar and wireless communication systems for simple structure, low-cost fabrication, wide beam-steering, and CP properties.

• 出版日期2017
• 单位中国人民解放军国防科学技术大学