Microwave and Optical Technology Letters · 2007 · 28 citations · 11 references
EngineeringElectrical EngineeringAntennasMicrowave EngineeringWrongful TerminationMicrostrip CircuitsMicrowave FiltersMicrowave Integrated CircuitsMicrowave Transmission LinesResonant CircuitsCutoff FrequencyDefected Ground StructuresLow-pass FiltersMicrostrip FiltersMicrostrip Low-pass FiltersMicrostrip ResonatorsMicrowave Filter DesignSpecific Attenuation
Abstract A new compact microstrip low‐pass filter (LPF) is presented using a novel rectangular patch compact microstrip resonant cell (RPCMRC) and square‐head defected ground structure (DGS). It exhibits wide, high stopband, and sharp rejection. A demonstration LPF having 3 dB cutoff frequency of 2.65 GHz was fabricated and measured. Measured rejection is better than 20 dB from 2.8 to 16 GHz. Electrical length of the filter is less than 20% of the guided wavelength at 3 dB cutoff frequency. Measured passband to stopband attenuation slope is more than 56 dB/GHz. Good match between experimental and simulated results are obtained. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 798–800, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22259
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