Dual-Band Filters with Frequency-Separated Dual-Path Coupling Scheme

Abstract

The dual-path topology is provided for dual-band filter design. The frequency-separated property is analyzed, and it shows the capability to design the filtering function separately in each path. Moreover, the dual-path topology is compatible with both symmetric and asymmetric dual-band characteristic. Two microstrip implementations are provided to demonstrate the reliability of dual-path dual-band topology.