Broadband Microwave Crossover Using Combination of Ring Resonator and Circular Microstrip Patch

The design of a novel wideband microwave crossover is presented. The proposed structure is fully compatible with microstrip circuits as it is printed on one side of a single-layer substrate. The structure is made up of a circular microstrip patch connected to a ring resonator. The operation of the presented design is explained by deriving the equivalent circuit model using the second-order even-od...