A 1-Bit Electronically Reconfigurable Unit Cell Using PIN Diode for Reflectarray Antenna

Abstract

We present a unit cell that provides an electronically reconfigurable 1-bit phase shifter with a wide operating band. The unit cell has a size of 8 mm × 8 mm and is composed of multiple layers. The top-layer of the unit cell consists of four arrow-shape patches, and these four arrows are connected to two PIN diodes on the bottom surface through vias. Simulation results show that the reflection coefficient is higher than -2 dB along with a phase difference of 180° between the two modes. In the future, the proposed reconfigurable unit cell will be used for a reflectarray antenna operating at 12.9 to 16.7 GHz.