Coplanar Lumped Element 180o Hybdir Coupler
The example documented here is a 4-port hybrid consisting of "ideal" lumped elements like inductors and capacitors. This type of circuit is applicable for balanced mixers for example. The complete schematic representation is given in Figure 9-10. Figures 9-11 shows the layout of the circuit. Most of the circuit is built in level 2 in order to keep the losses low (in the default foundry level 1 has a smaller thickness than the level 2). The results are plotted in Figure 9_12.
|Figure 9-10. Schematic of the 180o Coupler with Lumped Element||Figure 9-11. Layout of the 180o Coupler with Lumped Element|