Compact Conical-Line Power Combiner Design Using Circuit Models

A simple equivalent circuit model with empirical equations describing the peripheral feeding ports of conical-line power combiners is presented. The model allows the entire structure to be designed using transverse electromagnetic circuit theory without the need for any full-wave simulations. A summary of the model extraction process is given and the accuracy of the proposed model is confirmed by favorable comparisons with full-wave simulations. The circuit based design method is used to design a compact conical-line combiner showing measured performance similar to the current state of the art combiners in this technology, while being significantly smaller.