NDLI: Comment on sharp-rejection and ultra-wide bandstop filter with five transmission zeros frequencies

Content Provider	IET Digital Library
Author	Velidi, Vamsi Krishna Subramanyam, Abburu Venkata Guru Srinivasan, Veragur Venkataraman Sanyal, Subrata
Abstract	In this letter, explicit transmission zero conditions, for the ultra-wide bandstop filter (BSF) with five transmission zeros, are derived using even-odd mode, analysis. The BSF topology is obtained by folding the two connecting transmission lines in a conventional optimum BSF to compose a stub-loaded coupled-line section and using λ g/2 end open-stubs. A necessary and sufficient condition is explored for the crucial coupled-line section to produce three transmission zeros. Further, it is shown that the same five zeros BSF stopband bandwidth and rejection level performance is obtained with compact three zeros BSF (without λ g/2 open-stubs) with improved passband flatness and return loss.
Starting Page	1134
Ending Page	1136
Page Count	3
ISSN	17518725
Volume Number	8
e-ISSN	17518733
Issue Number	Issue 13, Oct (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/8/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2014.0354
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2014-09-05
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Band-pass Filter Band-stop Filter BSF Equivalent Model Approach Even-odd Mode Analysis FBW Filtering Method in Signal Processing Poles And Zeros Return Loss Performance Sharp-rejection Filter Signal Processing Theory Stub-loaded Coupled-line Section Transmission Zero Frequency Ultra Wideband Technology Ultrawide Bandtop Filter Zero-separation Fractional Bandwidth
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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