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From: John Popelish
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X-Mailer: Mozilla 4.7 [en] (Win98; U)
Subject: Re: Replacing two microstrip stubs with one
Date: Fri, 15 Nov 2002 16:53:29 GMT
NNTP-Posting-Date: Fri, 15 Nov 2002 11:53:29 EST
The Technical Manager wrote:
> I have a microstrip transmission line that has two short circuited stubs
> connected to it at the same point which radiate off in opposite
> directions to each other so that the interconnection point is a cross
> junction. Each stub has a different characteristic impedance and
> electrical length. I want to replace these two stubs with a single short
> circuited stub. How do I find the correct characteristic impedance and
> electrical length of the replacement stub ? Does a formula exist to
> calculate this ?
Each shorted stub acts a lot like a tuned circuit (an LC pair). There
is no way to replace two tuned circuits with a single tuned circuit
and get the same frequency response.
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