Abstract

A high-gain reflectarray(RA) antenna is proposed in this paper for millimeter wave applications. The unit cell of the RA is etched on the top surface of a substrate, with a circular patch and a concentric circular ring. It can be found that this unit cell can cover a whole 360°, with an insertion loss lower than 0.3 dB. To verify the design idea, a 24×24 unit RA antenna was designed, fabricated, and measured. Its measured realized gain can be up to 28.1 dBi, with satisfactory cross-polar and sidelobe levels.

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