Microstrip Tunable Bandpass Filter with the Colinear Resonators | Zendy

Z. P. Wang | Zendy; P.S. Hall | Zendy; James R. Kelly | Zendy; P. Gardner | Zendy

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Microstrip Tunable Bandpass Filter with the Colinear Resonators

Author(s) -

Z. P. Wang,

P.S. Hall,

James R. Kelly,

P. Gardner

Publication year - 2013

Publication title -

international journal of antennas and propagation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.282

H-Index - 37

eISSN - 1687-5877

pISSN - 1687-5869

DOI - 10.1155/2013/960138

Subject(s) - varicap , band pass filter , passband , voltage controlled filter , distributed element filter , insertion loss , electronic engineering , m derived filter , filter (signal processing) , butterworth filter , band stop filter , materials science , prototype filter , high pass filter , low pass filter , electronic filter topology , capacitance , optoelectronics , electrical engineering , engineering , physics , electrode , quantum mechanics

This paper presents the lumped element circuit and transmission line equivalent circuit for a varactor-tuned bandpass filter. The filter consists of transmission lines, fixed capacitors, and a varactor diode. The colinear resonant sections, in this filter, are not configured in parallel, as they are in a conventional combline filter. For this reason the overall area of the filter is reduced. The passband of the filter can be tuned from 0.69 GHz to 1.20 GHz by varying the capacitance of the varactor diode. The insertion loss of this filter changes from 1.2 dB to 2.1 dB across this bandwidth

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