A BROADBAND REFLECTARRAY ANTENNA WITH DOUBLE SQUARE RINGS

摘要

A reflectarray antenna composed of double square rings of variable lengths printed on a conductor-backed substrate is proposed for reflectarr ay-bandwidth enhancement. Using this technique, a single-layer reflectarray of a wider bandwidth compared to conventional single-layer reflectarrays is designed, fabricated, and measured. The measured results demonstrate a radiation efficiency close to 52% and 1-dB gain bandwidth of 9%, centered at 22 GHz.