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Perfectly-matched bandstop filters using lossy resonators

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4 Author(s)
Guyette, A.C. ; Sch. of Electron. & Electr. Eng., Leeds Univ., UK ; Hunter, I.C. ; Pollard, Roger D. ; Jachowski, Douglas R.

Normal realizations of bandstop resonators with finite unloaded Q suffer from degradation of performance due dissipation loss. In this paper, it is shown theoretically that there exists a class of second-order networks which simultaneously exhibit an ideal bandstop resonance, with infinite stopband attenuation, and a perfect match at all frequencies. Theoretical analysis is backed up with experimental results for three different physical realizations.

Published in:

Microwave Symposium Digest, 2005 IEEE MTT-S International

Date of Conference:

12-17 June 2005