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Enhanced topologies for the design of dual‐mode filters using inductive waveguide structures
Author(s) -
Mendoza M. Martinez,
Martinez D. Martinez,
Rebenaque D. Canete,
AlvarezMelcon A.
Publication year - 2015
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1002/2014rs005419
Subject(s) - passband , topology (electrical circuits) , waveguide filter , waveguide , network topology , band pass filter , realization (probability) , network synthesis filters , filter (signal processing) , computer science , microwave , coupling (piping) , electronic engineering , pole–zero plot , prototype filter , filter design , physics , telecommunications , optics , engineering , mathematics , transfer function , electrical engineering , operating system , mechanical engineering , statistics , computer vision
This paper presents novel topologies for the design and realization of microwave filters combining dual‐mode and single‐mode cavities in all‐inductive waveguide technology. Examples of orders 3–5 with one or two transmission zeros are synthesized and designed, in order to demonstrate the validity of the proposals. All the coupling schemes explored exhibit the zero‐shifting property, so the transmission zeros can be easily placed above or below the passband. A four‐pole dual‐band‐pass filter is also designed to show the flexibility offered by the novel structures. A prototype of this dual‐band filter has been manufactured and tested in order to provide experimental validation for these new structures. Important aspects of synthesis techniques, required to obtain the associated coupling topologies and to perform the final physical design of the waveguide filters, are also addressed in this paper.