A Dual-Layer T-Shaped Element for Broadband Circularly Polarized Reflectarray With Linearly Polarized Feed

作者：Ren, Li-Shi^*; Jiao, Yong-Chang; Li, Fan; Zhao, Jin-Juan; Zhao, Gang

来源：IEEE Antennas and Wireless Propagation Letters, 2011, 10: 407-410.

DOI：10.1109/LAWP.2011.2148090

• Broadband
• circular polarization
• reflectarray
• T-shaped

A novel dual-layer T-shaped element is presented for designing a circularly polarized (CP) reflectarray that converts the linearly polarized incident field of the feed into an outgoing circularly polarized field. Compared to the microstrip rectangle patch, the T-shaped one can show an almost linear behavior and a much larger phase variation range that exceeds 500 degrees with a low slope. Then, a prime-focus 81-element reflectarray with this type of element has been designed and implemented. The measured results show that the obtained 1-dB gain bandwidth and 3-dB axial-ratio bandwidth of the reflectarray with the T-shaped elements can reach as large as 20% and 28%, respectively.

• 出版日期2011
• 单位西安电子科技大学