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http://dx.doi.org/10.6109/jkiice.2022.26.11.1686

Design Analysis of Impedance Matching Circuit by Phasor Plot  

Weon, La-Kyoung (Department of Undergraduate, Kosin University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.26, no.11, 2022 , pp. 1686-1696 More about this Journal
Abstract
The impedance matching circuit design technique based on the phasor plot introduced in this paper is based on the impedance triangle of electric circuit. It is a technique that designs through the construction of a phasor figure using the values given to the matching circuit design. The design pattern is based on L-type, inverted L-type, T-type, and 𝜋-type, and unknown reactance elements are determined through phasor shapes. In this paper, using a design by phasor plot, we design several cases, such as the case where the input and output ports are pure resistance and have reactance. It was confirmed that the design value was verified by serial-parallel equivalent conversion to achieve matching. This design technique can immediately grasp the phase or size of input/output power, so it is expected to be applied mainly in a low frequency band due to rapid design change and application.
Keywords
Impedance; Matching; Phasor; Phase difference; Equivalent transformation;
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