IEEE Microwave and Wireless Components Letters · 2012 · 63 citations · 14 references
EngineeringElectrical EngineeringAntennasMicroelectronicsMicrowave EngineeringImpedance MatchingMicrostrip CircuitsMicrowave FiltersMicrowave MeasurementsMicrowave Transmission LinesUltra-wideband CommunicationBandpass FilteringBandpass FiltersElectromagnetic Field SimulationEquivalent Circuit AnalysisEquivalent Circuit ModelingFull-wave Electromagnetic SimulationHarmonicsStepped-impedance Filters
In this letter, an ultra-wideband (UWB) bandpasss filter with multiple notch bands is presented. The UWB bandpass characteristic is achieved using a modified distributed highpass filter (HPF) and suppressing higher order harmonics of the HPF by realizing defected stepped impedance resonator. The dual band notches at 5.75 and 8.05 GHz are obtained by embedding two open stubs on the main microstrip line. The in band and out of band performance obtained from fullwave electromagnetic simulation, equivalent circuit model and measurement are in good agreement.
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