DC Bias Routing Design for Wideband Reconfigurable Transmitarray Based on 1-Bit Phase-Switching Elements

DC bias routing design is critical but challenging for a wideband reconfigurable transmitarray (RTA) to control its unit cells without compromising its performance. To analyze the impact of routing and to eliminate the need for discrete RF choke components, three common routing rules are first summarized followed by a proposed advanced rule: to disperse the modal deterioration areas of each mode. Based on these rules, four DC bias routing cases are designed for an RTA composed of 8 × 8 wideband 1-bit phasing elements [9] and analyzed using modal deterioration analysis. The simulated radiation patterns of the 8 × 8 RTA under the four routing cases are compared to assess the impact of different routing strategies. The results are coherent with the modal deterioration analysis and verify that the proposed routing rule is beneficial for wideband RTA design in keeping the radiation performance unaffected without using discrete components for RF choking.