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Question about balun, fet is D1009UK of semelab

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Boowei

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Question about balun

Hi All,
Does anyone know the balun(T2&T3) in the following figure is 1:4 or 1:9.
the fet is D1009UK of semelab.
Thank.
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Question about balun

So what do you really want to know?
 

Re: Question about balun

1:4
 

Re: Question about balun

Thank vfone, chaoFan.
May you tell me what is the different between this balun and the balun(T4&T5) as following fig?
the mosfet is UF28150J of macom.
 

Question about balun

Nothing is different. T4,T5 are 1:1 t-line transformers, The way they are hooked up creates a 4:1 transmision line transformer.
 

Re: Question about balun

Thank.
How can I calculate the impedance transform of this balun with I and V.or Are there some book or paper about it?
 

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