- 易迪拓培训,专注于微波、射频、天线设计工程师的培养
transformer coupling co efficient in agilent ADS momentum
I am trying to make a transformer in ADS momentum..
i am using following equations to calculate L and Q of individual inductors
L = imag(1/y(1,1))/(2*pi*f)
Q = imag(y(1,1))/real(y(1,1))
replace y(1,1) by y(2,2) for second inductor
Qustion:(1) does this formula hold true when both inductors are modeled as differential inductors?
(2) how do i calculate coupling co-efficient k of the transformer?
thanks
Z=stoz(S,50)
Y=stoy(S,50)
k=mag(sqrt((1/Y(1,1)-Z(1,1))*Z(2,2)/imag(Z(1,1))/imag(Z(2,2))))
Can you show the source of this formulae ?
See my ppt http://www.home.agilent.com/upload/c...x_FrontEnd.pdf page 13.
My question was that.. How could you extract this relation between s-parameters and coupling coefficient ?
To my knowledge, coupling coefficient is a mechanical parameter and can not be pre-determined before.
How could you get this correlation ? Which theory supports this relation behind ?
Thanks for your answers in advance..
@bigboss/Zander_ua: can any of you tell me how to assign a ground to a transformer in ADS momentum? if i assign port 1 to one end of primary and ground the other end, ie not make a differential circuit, the analysis of equivalent circuit becomes very easy..i'll assign port 2 to one end of secondary and ground the other end of secondary too..thanks in advance..
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