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rf amplifiers stability network

Discussion in 'Electronic Basics' started by tsp, Apr 10, 2004.

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  1. tsp

    tsp Guest

    Hi,

    I was simulating a RF amplifier and I found out that by using a
    feedback stabilization network, the input reflection coeffecient is
    lowered. (At the moment I do not have any matching networks, I am
    simply seeing what the S-parameters are?) Why is that? Does
    anybody know?

    Thanks,
    tspjor
     
  2. Joerg

    Joerg Guest

    This is because you are physically connecting something to the input
    that wasn't there before, and its effect is magnified by the gain. The
    first couple pages of this doc may help:

    http://web.mit.edu/klund/www/papers/jmiller.pdf

    Read on though, it has an interesting copy attached to it from the
    roaring 20's...

    Regards, Joerg.
     
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