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Applications of the Z‐Y T‐chart for nonreciprocal stub tuners
Author(s) -
Torrungrueng D.,
Thimaporn C.
Publication year - 2005
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.20789
Subject(s) - stub (electronics) , smith chart , electric power transmission , impedance matching , transmission line , chart , microwave , electrical impedance , reciprocal , engineering , electronic engineering , electrical engineering , telecommunications , mathematics , linguistics , statistics , philosophy
Abstract Impedance matching is a part of the design process for a microwave system to achieve the maximum power delivered to the load. In this paper, nonreciprocal single‐stub and double‐stub matching networks are studied graphically using a generalized Smith chart, called the T‐chart, developed for nonreciprocal transmission lines. The stubs can be connected in series or in parallel with the main feed line. Basic procedures and concepts for nonreciprocal stub tuners are similar to those of reciprocal ones. It is found out that the “forbidden region” for double‐stub shunt tuners, where the load cannot be matched, is independent of the phase angle ϕ of associated characteristic impedances of nonreciprocal transmission lines. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 259–262, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20789