Open AccessLoss minimisation in λ/4 impedance transformers using multiple λ/4 segments
Author(s) -
Li C.,
Ricketts D.S.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2012.3382
Subject(s) - minimisation (clinical trials) , electrical impedance , transformer , computer science , electronic engineering , mathematics , engineering , electrical engineering , voltage , statistics
Presented is an analysis of loss in quarter‐wavelength impedance transformers. It is shown that the loss of an impedance transformer, S 21 , is a function not only of the dielectric and conductor loss, but also the transformation ratio. S 21 is derived as a function of both loss and transformation ratio and it is shown that for high transformation ratios, using two or even three quarter‐wavelength impedance transformers results in an overall lower loss.