IEEE Microwave and Wireless Components Letters · 2009 · 56 citations · 7 references
EngineeringElectrical EngineeringMicroelectronicsMicrowave EngineeringPassive DesignImpedance MatchingMicrostrip CircuitsMicrowave FiltersMicrowave Integrated CircuitsMicrowave Network AnalysisMicrowave Transmission LinesBand-pass FiltersBand-stop FiltersLow-pass FilteringLow-pass FiltersMicrostrip FiltersMicrostrip Low-pass FiltersMicrowave Filter DesignStepped-impedance Filters
This letter presents a novel design of a microstrip low- pass filter (LPF) with an embedded band-stop structure, which is constructed from a simple two transmission line band-stop filter. The band-stop structure is ingeniously embedded into a classical step-impedance microstrip LPF. The stop-band of the proposed LPF is more than two times broader than the original design, while its cut-off frequency remains at 1.8 GHz. The embedded structure does not increase the physical dimension of the LPF, but improves the performance significantly. Measured results agree with simuAcircnot lation well, and validate the dual-frequency design method.
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