Compact Dual-band BPF Composed of LC J-inverters Using Lumped Elements

Abstract

A compact dual-band bandpass filter (DB-BPF) composed of chip and patterned lumped elements is realized. Two types of dual-band LC J-inverters are proposed for DB-BPF design. Also, a large amount of attenuation between two BPF characteristics is realized by the effects of the proposed dual-band LC J-inverters. The fabricated DB-BPF has both good isolation characteristics and compact size.