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Ultra-wideband bandpass filter using broadband planar Marchand balun

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2 Author(s)
Feng, W.J. ; Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China ; Che, W.Q.

A novel ultra-wideband (UWB) bandpass filter using a planar Marchand balun is proposed. Owing to the different input/output impedances of the planar Marchand balun, the UWB bandpass filter has an adjustable fractional bandwidth from 74 to 114%, by cascading two planar Marchand baluns based on the transversal filter concepts. Detailed design and synthesis procedures for the UWB bandpass filter are provided.

Published in:

Electronics Letters  (Volume:47 ,  Issue: 3 )