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Log periodic bandstop filter
Author(s) -
Sithole E. S.,
Malherbe J. A. G.
Publication year - 2009
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.24652
Subject(s) - series (stratigraphy) , logarithm , band stop filter , microwave , filter (signal processing) , simple (philosophy) , transmission line , function (biology) , electronic engineering , physics , mathematics , engineering , computer science , electrical engineering , mathematical analysis , telecommunications , low pass filter , philosophy , paleontology , epistemology , evolutionary biology , biology
Most conventional transmission line filters are commensurate structures, with all elements that contribute to the filter performance of equal length. In this article, a structure is described that makes use of a series of elements that vary in length and spacing according to a logarithmic function; this results in a series of transmission zeros at real frequencies. It is shown that excellent filtering performance can be obtained from a relatively simple construction. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2418–2420, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24652