Design and Implementation of Wideband Rotman Lens with Wide-angle Scanning
A compact microstrip Rotman lens with wideband wide- angle scanning ability based on high permittivity substrate and different sizes of ports are presented. In order to verify the rationality of the design, a Rotman lens with a size of 13×18 is designed based on low frequency wideband demand. Simulation and measurement results indicate that the designed Rotman lens can realize bandwidth from 0.8 GHz to 2 GHz with a relative bandwidth of 86％ and achieve the ability of wide- angle scanning from- 45° to 45° and total insertion losses better than 6 dB throughout the whole band. Meanwhile, the simulation results are in good agreement with the measurement results.
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