A novel ultra-wideband bandpass filter with fixed and reconfigurable notch bands using terminated cross-shaped resonators

A compact ultra-wideband bandpass filter with fixed and reconfigurable notch bands using terminated cross-shaped resonator is proposed. Two notch bands can be realized in the passband, with a fixed band and a reconfigurable band. The reconfigurable band can be adjusted by changing the terminated loaded capacitance. The ultra-wideband passband is realized by three parallel coupled lines, and the notch bands are realized by using terminated cross-shaped resonators. Good agreements can be observed between the measured and simulated results.