NDLI: Discrete shape optimization method for the non-uniform transmission line directional couplers

Content Provider	IEEE Xplore Digital Library
Author	Miazga, P.
Copyright Year	2010
Description	Author affiliation: Institute of Radio Electronics, Warsaw University of Science and Technology, Warszawa, Poland (Miazga, P.)
Abstract	In this paper a new method for a non-uniform directional couplers design is presented. It is modeled on the cascade connection of a large number of short, equal length sections of a uniform coupled transmission line. The coupling coefficient vector is optimized with the non-smooth sub-gradient algorithm. The performance of the optimization algorithm is surprisingly good. The algorithm generates many, close to optimal, solutions, with a variety of shapes. Initial profiles are almost smooth. However, at the end of optimization, shape tends to converge to a technological constraint. The optimal structure consists of a cascade connection of uniform coupled transmission line sections (of maximal coupling), separated by sections of a non-coupled transmission line.
Starting Page	1
Ending Page	3
File Size	249171
Page Count	3
File Format	PDF
ISBN	9781424452880
e-ISBN	9781424459148
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-14
Publisher Place	Lithuania
Access Restriction	Subscribed
Rights Holder	Geozondas Co.
Subject Keyword	Shape Optimization methods Transmission lines Directional couplers Constraint optimization Planar transmission lines Ultra wideband technology Circuit synthesis Coupling circuits Frequency sub-gradient non-uniform directional coupler optimization
Content Type	Text
Resource Type	Article

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