Design of A 2-Bit Dual Linearly Polarized Reconfigurable Reflectarray Element

A novel design approach for dual-polarized 2-bit reconfigurable reflectarray element is proposed. The transmission phase shifter is designed using a single-layer Jerusalem cross loaded with four PIN diodes. By spatially cascading it with a 1-bit reflective phase shifter using a Malta cross integrated with 2 PIN diodes, a 2-bit phase resolution is achieved by switching these six PIN diodes. The simulated results show that the proposed element has good performance at four phase states, where the average insertion loss is 2.2 dB at 5.8 GHz. Compared with the conventional multi-bit phase reconfigurable design, the proposed method has advantages on simple structure, low loss, and low lost.