Low-Profile Ultrawideband Circularly Polarized Metasurface Antenna Array

作者：Gu, Lizheng; Yang, Wanchen^*; Feng, Wenjie; Xue, Quan; Meng, Qian; Che, Wenquan^*

来源：IEEE Antennas and Wireless Propagation Letters, 2020, 19(10): 1714-1718.

DOI：10.1109/LAWP.2020.3014436

• Antenna arrays
• Ultra wideband antennas
• Antenna feeds
• Wideband
• Impedance
• Circularly polarized (CP)
• low profile
• metasurface antenna (MSA) array
• ultrawideband
• wideband feeding network

A compact low-profile ultrawideband circularly polarized (CP) metasurface antenna (MSA) array is presented in this letter. The array consists of 2 x 2 sequentially rotated symmetric MSA elements and a wideband four-way feeding network providing stable phases of 0 degrees, 90 degrees, 180 degrees, and 270 degrees. By using the constructed feeding network and MSA element, the CP array can achieve an ultrawideband CP performance with a low profile of 0.05 lambda(L). The measured results show that the proposed MSA array achieves the 10 dB impedance bandwidth of 97.2%, 3 dB axial ratio bandwidth of 83.2%, and 3 dB gain variation bandwidth of 73.8%. Compared with the other designs in published literatures, the proposed CP MSA array owns the advantages of low profile with a simple structure and good CP performance without any air gap, thus indicating a promising candidate in compact wideband wireless systems.

• 单位
  南京理工大学