Post subject: question about balun? Posted: Sat Sep 12, 2009
Joined: Sun Jun 07, 2009 9:14 am
1.Who know the balun(T2&T3) in following picture is
1:4 or 1:9?
2.If the balun(T2&T3) is 1:4,then what is
the different between this balun and another balun(T4&T5) as following
subject: Re: question about balun?Posted: Wed Sep 16, 2009 12:18 pm
Joined: Thu Mar 30, 2006 9:01 am
Based on the cascode transistor configuration,
I'd say those are coaxial implementations of 3dB hybrid couplers for
the input and output. Length differences for input/output are for bandwidth/tuning
Post subject: Re: question about
balun?Posted: Thu Sep 17, 2009 8:09 am
Sun Jun 07, 2009 9:14 am
Thank Jose Arrina.
know the impedance transform of the balun is 1:4 or 1:9?