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Optimized E-plane bandpass filters with improved stopband performance

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1 Author(s)
Budimir, D. ; Dept. of Electron. & Electr. Eng., King''s Coll., London, UK

A computer-aided synthesis technique for E-plane bandpass filters with improved stopband performance is developed. An optimization procedure based on equal ripple optimization is adopted. The design of a symmetrical E-plane bandpass filter with improved stopband performance is considered; higher order mode interaction between E-plane discontinuities is included in the design. The predicted filter performance shows improved stopband performance and reduced filter dimensions compared with conventional E-plane bandpass filters. The validity of the method is confirmed by the measurement of a fabricated five resonator E-plane bandpass filter with improved stopband performance

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:45 ,  Issue: 2 )