Synthesis of Symmetric and Asymmetric Singly-Terminated Elliptic Ladder Filters for Multiplexing Applications

TitleSynthesis of Symmetric and Asymmetric Singly-Terminated Elliptic Ladder Filters for Multiplexing Applications
Publication TypeJournal Article
Year of Publication2009
AuthorsMontejo-Garai, J. R., J. A. Ruiz-Cruz, and J. M. Rebollar
JournalInternational Journal of RF and Microwave Computer-Aided Engineering
Volume19
Pagination443-452
Date PublishedJuly
ISSN1096-4290
Keywordsdiplexer, filter synthesis, pole removal, singly terminated, zero-shifting
AbstractAn 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.
URLhttp://www3.interscience.wiley.com/cgi-bin/fulltext/122322557/PDFSTART
DOI10.1002/mmce.20366