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Author Topic: How Reflections are generated in unmatched transmission line?  (Read 3359 times)

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Offline Kedar264Topic starter

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How Reflections are generated in unmatched transmission line?
« on: May 24, 2015, 05:28:18 am »
I perticularly want to know about joints in tratransmission line ,how sigals reflection occure at joints . Thinking a lot ...  :palm:

Please let me know Any related contents .
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Offline miguelvp

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Re: How Reflections are generated in unmatched transmission line?
« Reply #1 on: May 24, 2015, 06:23:06 am »
These two videos might help:




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Offline hamster_nz

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Re: How Reflections are generated in unmatched transmission line?
« Reply #2 on: May 24, 2015, 06:42:18 am »
Watch  and understand...

 

Oldie but a goodie
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Offline AlfBaz

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Re: How Reflections are generated in unmatched transmission line?
« Reply #3 on: May 24, 2015, 06:47:23 am »
you can also have a look at this previous thread
https://www.eevblog.com/forum/chat/how-are-signals-reflected-in-a-wire/
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Offline John_ITIC

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Re: How Reflections are generated in unmatched transmission line?
« Reply #4 on: May 24, 2015, 06:53:45 am »
Quote from: Kedar264 on May 24, 2015, 05:28:18 am
I perticularly want to know about joints in tratransmission line ,how sigals reflection occure at joints . Thinking a lot ...  :palm:

Please let me know Any related contents .

I would suggest studying the first 5 hits on Google.
https://www.google.com/search?q=pcb+transmission+line&ie=utf-8&oe=utf-8#q=transmission+line+reflections
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Offline Rupunzell

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Re: How Reflections are generated in unmatched transmission line?
« Reply #5 on: May 24, 2015, 07:40:51 am »
Adding a bit of math and theory.

Spend the time to watch lecture series 5, then lecture series 6. This will give some foundational knowledge to how this transmission line stuff works.




 



Bernice
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Offline miguelvp

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Re: How Reflections are generated in unmatched transmission line?
« Reply #6 on: May 24, 2015, 08:21:56 am »
Quote from: hamster_nz on May 24, 2015, 06:42:18 am
Watch  and understand...

Oldie but a goodie

I love those wave machines.
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Offline Jeff1946

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Re: How Reflections are generated in unmatched transmission line?
« Reply #7 on: May 24, 2015, 08:02:32 pm »
You may want to check out this web site on vibrations,

http://www.acs.psu.edu/drussell/Demos/reflect/reflect.html

to compare a wave on a string to a transmission line.  Note how the wave is inverted with a hard reflection (transmission line shorted) vs a soft reflection (transmission line open).  With perfect termination, typically 50 ohms, there is no reflection as if the transmission line went out to infinity.
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