MODIFIED SHORT-CIRCUIT QUARTER-WAVELENGTH RESONATORS FOR THE DESIGN OF MICROSTRIP DUAL-PASSBAND BANDPASS FILTER

摘要

In this article, a novel microstrip dual-passband bandpass filter has been proposed and developed. This filter is composed of two modified short-circuit quarter-wavelength resonators with a half-wavelength stepped-impedance resonator. Design procedures and theoretical analysis are provided; the prototypical bandpass filter with dual passbands is fabricated and measured as well. Well matched simulated results and experimental data validate the proposed filter.