Corrugated Microstrip Coupled Lines for Constant Absolute Bandwidth Tunable Filters

@article{ElTanani2010CorrugatedMC,
  title={Corrugated Microstrip Coupled Lines for Constant Absolute Bandwidth Tunable Filters},
  author={Mohammed A. El-Tanani and Gabriel M. Rebeiz},
  journal={IEEE Transactions on Microwave Theory and Techniques},
  year={2010},
  volume={58},
  pages={956-963}
}
This paper presents corrugated coupled lines for miniaturized fixed and tunable microstrip bandpass filters. The novel approach uses microstrip corrugated coupled-line concept to synthesize a coupling coefficient, which maintains a nearly constant absolute bandwidth across the tuning range. A miniaturized two-pole varactor tuned filter is demonstrated with a frequency coverage of 1.32-1.89 GHz and an insertion loss < 3 dB with a constant 1-dB bandwidth of 70 ± 4 MHz across the tuning range. In… CONTINUE READING

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