Transverse segmentation: a novel technique for the efficient CAD of 2N-port branch-guide couplers

Two novel field-matching techniques, the cellular technique (CT) and the transverse segmentation technique (TST), for the computer-aided design (CAD) of 2N-port branch-guide couplers have been developed and are compared with the bifurcation technique (BT). By comparison with experimental data on 6- and 8-port couplers, all the techniques exhibit excellent accuracy, but different numerical efficiencies. The TST is shown to be eight times faster than the BT and five times faster than the CT. All methods can also be applied to other waveguide components.<>