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      Transformed radial stub cell embedded resonator for high performance filter applications

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      Author
      Ma, Kaixue
      Mou, Shouxian
      Wang, Keping
      Mahalingam, Nagarajan
      Yeo, Kiat Seng
      Date of Issue
      2012
      Conference Name
      IEEE MTT-S International Microwave Symposium Digest (2012 : Montreal, Canada)
      School
      School of Electrical and Electronic Engineering
      Abstract
      Parasitic passbands of the traditional resonators or bandpass filters are drawbacks for the resonator or filter to achieve wide stopband. A bandpass filter topology designed based on the embedded transformed radial stub cells is proposed for the first time. The implemented filter with center frequency ƒc=1.73 GHz and absolute bandwidth of 200MHz (fractional bandwidth of 1.2%) using transformed radial stub cell embedding demonstrates more than 45dB rejection up to 10.4ƒc i.e. 18 GHz. The measured group delay is around 3.6∼4.3 nS. The sizes of the designed fourth order bandpass filter is only 0.42 λg × 0.26 λg, (λg is the guide wavelength at center cutoff frequency) without using any lumped elements.
      Subject
      DRNTU::Engineering::Electrical and electronic engineering
      Type
      Conference Paper
      Rights
      © 2012 IEEE
      Collections
      • EEE Conference Papers
      http://dx.doi.org/10.1109/MWSYM.2012.6258258
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