A Dual-Functional Circularly Polarized Surface Using Polarizer Integrated

This paper introduces a dual-functional circularly polarized (CP) surface using polarizer integration. It is the first attempt to propose a concept of polarizer fusion design, realizing CP partial reflection function at 7GHz and CP reflection effect at 30GHz, enabling the combination of a CP partially reflective surfaces (PRS) and a CP reflectarray (RA). For excitation, a horn operated at high frequency band for RA and a magnetic dipole operated at high frequency band for FPC are used as feed sources. For validation, a prototype of the proposed surface is designed, fabricated, and measured. The measured results show the 3-dB gain bandwidths of 8.5% and 23.7<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">%</sup> with peak gains of 17.3 and 20.5 dBic over two bands are achieved, respectively. The proposed design is a good candidate for future communications system that require high integration, wideband and high-CP-gain.