2-Dimensional Field Analysis For Cad Of Rotman-Type Beam-Forming Lenses

A general procedure for design and analysis of a Rotman-type beam-forming lens using 2-dimensional field analysis is proposed. Evaluation of reflection coefficients, coupling between ports, main beam direction, 3-dB beam width and side lobe level are described. The results for a sample case are in agreement with the experimental results. The procedure developed is suitable for CAD implementation leading to optimization of Rotman lens layout configuration.