Progress In Electromagnetics Research C · 2015 · 12 citations · 20 references
EngineeringElectrical EngineeringAntennasGlobal Navigation Satellite SystemsWireless CommunicationsMicrostrip CircuitsMicrowave FiltersMicrowave Transmission LinesMillimeter-wave CommunicationsRadio-frequency Integrated CircuitsReceiver SystemsBand-pass FilteringBand-pass FiltersFractional BandwidthGlobal Navigation Satellite Systems ReceiversGlobal Positioning SystemInsertion LossLow-pass FilteringLow-pass Filters
In this paper, a novel compact band pass filter (BPF) is proposed for Global Positioning System (GPS) receivers. The proposed BPF configuration is composed of a low pass filter (LPF) section formed by the coupled line transformer connected with a radial stub and two short circuited stubs embedded within the 50 microstrip line connecting the input/output (I/O) port of LPF. The lumped equivalent model of proposed BPF is also presented and analyzed. Simulation as well as experimental results shows very good in-band (pass-band) and out-of-band ( 7f c (centre frequency)) characteristics. The 3 dB fractional bandwidth (FBW) is 3.2% of f c , thus satisfying the GPS receiver requirement and the minimum insertion loss (IL) in pass-band is 1.28 dB.
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