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Transmission Line theory, please help! - RF Cafe Forums
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| screamtruth
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Post subject: Transmission Line theory, please help!
Posted: Thu Jul 01, 2004 3:08 pm
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Joined: Thu Jul 01, 2004
2:58 pm
Posts: 1
Location: Channelview,
Tx and World |
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I'm trying to learn transmission line theory on
my own, a difficult task, as I'm finding out. Keep
in mind, our sub sea control lines are balanced
tranmission lines, and have lengths in excess of
10km. Now, first can anybody explain the losses,
or attenuation of these lines? Is it just a function
of the series resistance per unit length? Or, is
it a function of frequency, impedance? Our test
frequencies are LOW, I mean in the range of 1 to
3 kHz. Does surface roughness play a part in this?
Secondly, I have no way to measure the reflection
coefficient or SWR caused by the Well load on the
opposite end. Last, I am trying to calculate the
NVP for a specific conductor in which I know the
Z,C,L values, is there an easy way to perform this?
How does the formula for propagation constant play
here; y=a+jB. y = prop constant, a = attenuation,
and jB for phase shift.
_________________
What? Huh?
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KC2SHO |
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Post subject:
Posted: Thu Jul 01, 2004 5:43 pm
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Joined: Mon Apr 12, 2004
4:50 pm
Posts: 20
Location: South Florida
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I have some very good training materials in PDF
format if you are interested.
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Posted 11/12/2012
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