A dual-band tunable reflectarray

In this work, a dual-band reflectarray with reconfigurable beam angle is presented. The unit cell of the reflectarray is a square ring-patch structure which was optimized to perform within two distinct frequency bands. The full wave simulation software HFSS was used to analyze a unit cell inside a waveguide, approximating the infinite array scenario. The tuning of the unit cell was achieved by altering the capacitance of a varactor diode placed between the square ring and the patch. A 10 × 10 element array will be built and measured to demonstrate its capability of beam steering over a wide range of angles.