NDLI: Triple-band impedance transformers using equal-length serial transmission lines

Content Provider	IET Digital Library
Author	Tsai, Lin Chuan
Abstract	A new formulation of the fundamental load impedance circuit in the z-plane is employed to study transformers. The design employs prototypes of transfer function, parametric modelling techniques, and optimisation methods; a model describing multisection transmission-line transformers is proposed to match load impedance for use in wireless and mobile communication applications. Configuration of the transformer consists of multisection serial transmission lines. This transformer was designed on a PCB FR4 substrate featuring a permittivity of 4.4, a loss tangent of 0.0245, and a thickness of 1.6 mm. Microstrip line circuits were fabricated to verify the feasibility of the technique. The simulation and measurement results show that real and complex load impedances can be matched simultaneously at three different frequency bands. The characteristic impedance values of the transmission lines synthesising the transformers were adjusted according to the autoregressive process by using optimisation algorithms. The experimental results are in agreement with theoretical values.
Starting Page	568
Ending Page	573
Page Count	6
ISSN	17518725
Volume Number	10
e-ISSN	17518733
Issue Number	Issue 5, Apr (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/10/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2015.0633
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2016-04-13
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Filter Active Network Autoregressive Process Equal-length Serial Transmission Line Impedance Converter Impedance Matching Inductors And Transformer Load Impedance Circuit Load Impedance Matching Microstrip Line Microstrip Line Circuit Mobile Communication Application Multisection Serial Transmission Line Multisection Transmission-line Transformer Optimisation Optimisation Method Optimisation Technique Parametric Modelling Technique PCB FR4 Substrate Printed Circuit Size 1.6 Mm Transfer Function Transmission Line Triple-band Impedance Transformer Waveguide And Microwave Transmission Line Wireless Communication Application
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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