Custom Search
Over 10000 Pages Indexed
Your Host
Click here to read about RF CafeKirt
Blattenberger

... single-
handedly
redefining
what an
engineering website
should be.

View the YouTube RF Cafe Intro Video Carpe Diem!
(Seize the Day!)

5CCG (5th MOB):
My USAF radar shop

Hobby & Fun

Airplanes and Rockets:
My personal hobby website

Equine Kingdom:
My daughter Sally's horse
riding business website -
lots of info

•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe©

RF Cafe E-Mail

Transmission Line theory, please help! - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: Transmission Line theory, please help!
Posted: Thu Jul 01, 2004 3:08 pm 
 
Lieutenant

Joined: Thu Jul 01, 2004 2:58 pm
Posts: 1
Location: Channelview, Tx and World
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?


 
   
 
 Post subject:
Posted: Thu Jul 01, 2004 5:43 pm 
 
Captain
 

Joined: Mon Apr 12, 2004 4:50 pm
Posts: 20
Location: South Florida
I have some very good training materials in PDF format if you are interested.

_________________
KC2SHO



Posted  11/12/2012
A Disruptive Web Presence

Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe
Webmaster: Kirt Blattenberger
    KB3UON

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

RF & EE Symbols Word
RF Stencils for Visio

Product & Service Directory
Personally Selected Manufacturers
RF Cafe T-Shirts & Mugs

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel