NDLI: Through-line method for transmission/reflection estimation of N-way multiport power-combining network

Content Provider	IET Digital Library
Author	Uchida, Hiromitsu Nakashima, Masao Handa, Seiichi Sagara, Takehiko Hariu, Ken ichi
Abstract	A transmission/reflection estimation method based on ‘through-line’ measurements is proposed for N-way tree-shaped power-combining network, mainly used as an output impedance-matching network of a multi-transistor-cell power amplifier (PA). The method can be applied when all the N branches can be seen identical to each other and are excited uniformly in-phase, and especially useful when the input impedance of the network has a non-resistive (reactance) component. In the proposed method, a pair of the N-way networks is connected directly in a back-to-back manner (‘through’ configuration) and with transmission lines in-between (‘line’ configuration), and their S-parameters are measured. The transmission/reflection coefficients of single N -way network can be estimated from the measured ‘through’ and ‘line’ S-parameters, where in the latter the electromagnetic coupling between the transmission lines should be dealt with carefully to avoid estimation error.
Starting Page	567
Ending Page	573
Page Count	7
ISSN	17518725
Volume Number	13
e-ISSN	17518733
Issue Number	Issue 5, Apr (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/13/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2018.5398
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2019-03-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplifiers Electromagnetic Coupling Impedance Matching Impedance-matching Network Line Configuration Multitransistor-cell Power Amplifier N-way Multiport Power-combining Network N-way Tree-shaped Power-combining Network Nonresistive Component Power Amplifier Power Combiners S Parameter Through-line Measurement Transmission Line Transmission-reflection Estimation Waveguide And Microwave Transmission Line Component
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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