LAUSR

A dual‐band linear‐to‐circular polarization converter is proposed and experimentally demonstrated in this work. The structure consists of four identical meander‐line layers separated by air. The converter transforms y‐polarized waves into left hand circular‐polarized waves in 19.7 to 20.2 GHz, and x‐polarized waves into right hand circular‐polarized waves in 29.5 to 30 GHz, corresponding to the dual‐band characteristic. With the incident angle ranging from 0° to 30°, the conversion remains realizable in the two working bands, fully verifying the polarizer's robustness within 30° oblique incidence. Besides, the proposed structure is fabricated using a normal PCB process. The experimental results match well with the simulation ones, which demonstrates the feasibility of our scenario. This work is beneficial for satellite communication in the K/Ka bands.