[time-nuts] Transmission line question

shalimr9 at gmail.com shalimr9 at gmail.com
Thu Apr 7 14:42:50 UTC 2011


If you rephrase the question, it becomes easier: what is the drive impedance I need to use to inject a signal at this point without getting reflection? 25 ohms because the two lines are in parallel at that point.

Now, however, signals coming from the other lines will not see a matched impedance when they get there and those will get reflected. That's why you don't see that done very often in RF/microwave circuits.

Didier KO4BB

 
Sent from my BlackBerry Wireless thingy while I do other things...

-----Original Message-----
From: Don Otknow <donald.otknow at gmail.com>
Sender: time-nuts-bounces at febo.com
Date: Wed, 6 Apr 2011 11:00:01 
To: <time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: [time-nuts] Transmission line question

Hello,

If I have a pin with two 50 ohm lines leading in opposite directions from
its land (let's say they are arbitrarily long so as to truly look like 50
ohm lines), what is the effective impedance that the pin sees?

Thanks,
Donald
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