Wideband Microstrip Ring Resonator Bandpass Filters Under Multiple Resonances

  • Sheng Sun, Lei Zhu
  • Published 2007 in
    IEEE Transactions on Microwave Theory and…
A new class of wideband microstrip bandpass filters is proposed under multiple resonances of an asymmetric ring resonator. Two capacitive coupling elements are placed at two perpendicular positions of a squared ring, whereas a pair of open-circuited stubs is formed in the symmetrical plane of these two excited ports similar to a dual-mode ring filter in… (More)

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