Electrical Tunable Microstrip LC Bandpass Filters With Constant Bandwidth

  title={Electrical Tunable Microstrip LC Bandpass Filters With Constant Bandwidth},
  author={Qianyin Xiang and Quanyuan Feng and Xiaoguo Huang and Dinghong Jia},
  journal={IEEE Transactions on Microwave Theory and Techniques},
In this paper, two- and three-pole microstrip LC constant fractional bandwidth (CFBW) and constant absolute bandwidth (CABW) tunable bandpass filters are proposed. The equivalent-circuit models are presented to study the tunable mechanism. The filter can be reconfigured by changing the capacitance of the LC resonators. Based on electric coupling coefficient compensation, second- and third-order tunable equivalent-circuit models with CFBW/CABW are presented. For demonstration, a semiconductor… CONTINUE READING
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