Design of an E-Band 1-Bit Reconfigurable Reflectarray Antenna Using PIN Diodes

A 1-bit reconfigurable reflectarray antenna using PIN diodes is presented for 71-76GHz millimeter-wave communication applications. Based on the method of polarization conversion, the 0°/180° element phase is accurately realized by loading 2 PINs on each element in order to overcome the unstable parameters of PIN in E-band. A square aperture reflectarray consisting of $16\times 16$ elements is then designed and analyzed. Full-wave simulation results demonstrate that the gain of the antenna is 17.1dBi, and the beam scanning angle can cover 45°.