Dual Circularly Polarized Fabry–Perot Antenna Using Single-Layer Self-Polarizing PRS
Hai Dang Le, Truong Le-Huu, Khac Kiem Nguyen, Son Xuat Ta
Abstract
This letter presents a dual circularly polarized (CP) Fabry–Perot antenna (FPA) using a novel self-polarizing partially reflecting surface (PRS). Its source element is a double differential-fed patch for generating a dual linearly polarized (LP) radiation. The PRS is an array of double truncated-corner patches with orthogonal slots and shorted pins, which is built on a single-layered substrate to not only ensure high reflectivity for a high-gain FPA but also convert the dual-LP waves to the dual-CP waves. A prototype operating at 5.8 GHz has been fabricated and measured. The proposed FPA with overall size of 2.4 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\lambda _{\text{0}}\times 2.4\lambda _{\text{0}}\times 0.58\lambda _{\text{0}}$</tex-math></inline-formula> at 5.6 GHz achieves a 10 dB return loss bandwidth (BW) of 11.3% (5.50–6.16 GHz), an isolation <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\ge$</tex-math></inline-formula> 17 dB, a 3 dB axial ratio BW of 8.6% (5.6–6.1 GHz), and a 3 dB gain BW of 13.8% (5.4–6.2 GHz) with the peak gain of 13.7 dBi.