DUAL-BAND FILTER USING STEPPED-IMPEDANCE AND DESIGN METHOD THEREOF

摘要

PURPOSE: A dual-band filter using stepped-impedance and a design method thereof are provided to control bandwidth and to be designed easily as having simple structure. CONSTITUTION: Stepped-impedance transmission lines (10) are cascaded with each other. Stepped-impedance opening stubs (20,30) are connected to the connection parts of the stepped-impedance transmission lines respectively. Stepped-impedance grounding stubs (40,50) are connected to the connection parts of the stepped-impedance transmission lines respectively.