A Coupling Matrix-Based Design of Triple-Band Matching Network

This letter proposes an analysis for synthesizing concurrent triple-band matching networks based on a modified coupling matrix theorem. Detailed design procedures are outlined for triple-band matching networks with illustrative design examples; a feasible simulation of hairpin resonator-based design reproduces the analytic prediction response. Excellent agreement between the theory and the EM simulation is obtained to validate the theory. Furthermore, compared to other matching networks, specific triple bands can be designed, and the selectivity and rejection capability in undesired bands are both excellent.