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Hi,
I have recently got into the topic of RF engineering and after reading a chapter on quarter wave transformers I am wondering why do we not use lambda/2 transmission lines to do the job instead...
What I mean is - when matching generator to load impedance, we know that transmission line's characteristic impedance of length lambda/4 can be used in such a way that \[ Z_0 = \sqrt{Z_{in} * Z_L} \]
However, when using lambda/2 we can mathematically derive an expression that \[ Z_{in} = Z_L \] and therefore transmission line's characteristic impedance does not come into play at all.
Then my question would be, why not matching generator to load by creating a lambda/2 transmission line instead of using quarter wave transformers?
I appreciate your answers
I have recently got into the topic of RF engineering and after reading a chapter on quarter wave transformers I am wondering why do we not use lambda/2 transmission lines to do the job instead...
What I mean is - when matching generator to load impedance, we know that transmission line's characteristic impedance of length lambda/4 can be used in such a way that \[ Z_0 = \sqrt{Z_{in} * Z_L} \]
However, when using lambda/2 we can mathematically derive an expression that \[ Z_{in} = Z_L \] and therefore transmission line's characteristic impedance does not come into play at all.
Then my question would be, why not matching generator to load by creating a lambda/2 transmission line instead of using quarter wave transformers?
I appreciate your answers
