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Synthesis of symmetric and asymmetric singly terminated elliptic ladder filters for multiplexing applications
Author(s) -
MontejoGarai José R.,
RuizCruz Jorge A.,
Rebollar Jesús M.
Publication year - 2009
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20366
Subject(s) - immittance , multiplexer , topology (electrical circuits) , microwave , pole–zero plot , diplexer , mathematics , band pass filter , constant (computer programming) , mathematical analysis , physics , multiplexing , computer science , electronic engineering , engineering , telecommunications , electrical engineering , optics , combinatorics , transfer function , quantum mechanics , programming language
An extension of the Cauer ladder development for synthesizing singly terminated filters with symmetric and asymmetric responses is presented. Basically, a driving‐point immittance including reactive constant elements is carried out in such a way that provides the transmission zeros. The reactive constant elements are introduced into the synthesis for two reasons. The first is to consider the possibility of the asymmetric position of transmission zeros in the real frequency axis. The second one is to obtain canonical forms, i.e. networks with the minimum number of elements in the case of symmetrical responses. To validate the proposed method, a filter with asymmetrical response has been synthesized, comparing different topologies for its use in multiplexers. This fact is illustrated with a Ku‐band elliptic response diplexer designed in H‐plane rectangular waveguide. © 2009 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2009.