Higher Order Cochlea-Like Channelizing Filters

A design method is presented for contiguous-channel multiplexing filters with many channels covering a wide bandwidth. The circuit topology extends previous work on cochlea-like channelizers by introducing multiple resonator-channel filter sections. The new design provides increased stopband rejecti...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2008-07, Vol.56 (7), p.1675-1683
Main Authors: Galbraith, C.J., Rebeiz, G.M.
Format: Article
Language:English
Subjects:
Applied sciences
Band pass filters
Bandwidth
Channelizer
Channels
Circuit properties
Circuits
cochlea
Covering
Design methodology
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
filter
Frequency
Insertion loss
manifold
Microwave filters
Microwaves
multiplexer
Multiplexing
Passband
Resonator filters
Shape
Switching, multiplexing, switched capacity circuits
Tuning
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Description
Summary:A design method is presented for contiguous-channel multiplexing filters with many channels covering a wide bandwidth. The circuit topology extends previous work on cochlea-like channelizers by introducing multiple resonator-channel filter sections. The new design provides increased stopband rejection, lower insertion loss, and improved passband shape compared with the earlier version while retaining a simple design method and a compact layout, and requires no post-fabrication tuning. Results of a three-pole ten-channel channelizer covering from 182 MHz to 1.13 GHz with 17.5% bandwidth channels and 1.1-dB insertion loss are presented, and agree well with theory. A discussion of the power handling of planar channelizers is also presented.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2008.925574