Design of compact BPF with controllable multiple transmission zeros for WIMAX applications

This paper proposes novel design for a compact LTCC BPF with high rejection over a wide stopband operating in the 3.4-3.6 GHz WIMAX band. The presented BPF has feedback paths for a grounding inductor and a coupling capacitor to provide controllable multiple transmission zeros at 2.4/5 GHz stopband, which enhances the desired stopband rejection.