A Tiled C-Band Dual-Polarized 1-Bit Transmitarray

Abstract

An original structure of tiled transmitarray is presented, comprising a number of topologically similar unit cells arranged in arbitrary pattern within a planar grid frame. Each unit cell represents a passive receiver-transmitter structure with integrated switched-loop couplers which can take either of two coding states corresponding to 0° or 180° phase shift imparted to the signal transmitting through the device. The unit cell design supports two orthogonal linear polarizations. The unit cells were fabricated in commercial 5-layer printed circuit board process. An example of a 10x10 element 1-bit beam-steering transmitarray operated in C-band is demonstrated by simulations and measurements. The proposed structure represents a cost-efficient solution for scalable, reconfigurable and conformal transmitarrays, as well as for proof-of-concept experiments in research and education.