Coaxial cable with ferrite beads spice model, anyone?

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joensd

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coax spice

Hi all,
this is my first inquiry at this cool place. Hope to find and give good advice.

I´m simulating cable transformers, baluns and especially power combiners; all with coaxial cables with ferrite cores. The latter doesn´t simulate as soon as the circuit gets more involved.
(for example more than 2 coaxial cables)
I´m simulating the ferrite beads by just placing inductors in parallel with both conductors of each coaxial cable.
Here´s a pdf-file of an amplifier using such coaxial cable transformers with ferrite beads for anybody that´s curious what I mean:


Has anyone done similar or can lead me into the right direction regarding coaxial cable models and it´s limitations? (I´m working in the UHF-range 400M-1G)
I have access to Agilents ADS (2006A) and Orcad´s PSpice.

thanks a heap & keep up the good work
Jens
 

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