Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes USAF radar shop Notable Quotes App Notes Calculators Education Engineering Magazines Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Stencils for Visio RF & EE Shapes for Word Advertising RF Cafe Homepage Sudoku puzzles Thank you for visiting RF Cafe!
MECA Electronics

Transmission Line Program for Windows (TLW) 2014 Update

ARRL Antenna Book 22nd - RF CafeThe June 2014 edition of QST (pp38-40) has an article by Joel Hallas (W1ZR) reporting on an updated version of the venerable Transmission Line Program for Windows (TLW), by Mr. R. Dean Straw (N6BV). The previous version was last released in 2006. Owners of the ARRL Antenna Handbook receive the program on the included CD/DVD, and are eligible for a free upgrade if you have a previous version. The Zip file can be downloaded from the ARRL website. If you are not eligible but would like to read the user's manual, download the Zip file and extract just the PDF file since the one available elsewhere on the Web is for the 2006 version.

According to Joel's review, the main changes in TLW are refinements in the manufacturer's data used for curve fitting and in the electrical parameter calculations. Results obtained from extreme source and load impedance scenarios could cause some strange values of loss, voltage and current distribution along the transmission line, etc.

I have managed to lose my CD so I cannot produce any examples of my own. However, the following couple images are screen shots from the user's manual that might whet your appetite for the program. As far as I know, it is available only with the purchase of the ARRL Antenna Handbook, which is currently selling for under $50. The software itself is worth that much if you require such calculations. According to Joel: "I can state that among all the programs and data on The Antenna Handbook CD, I find Transmission Line for Windows (TLW) to be the program that I use the most."

Transmission Line for Windows (TLW) v3.24 Screen Capture (1) - RF Cafe

Transmission Line for Windows (TLW) v3.24 Screen Capture (2) - RF Cafe

Transmission Line for Windows (TLW) v3.24 Screen Capture (3) - RF Cafe

Transmission Line for Windows (TLW) v3.24 Screen Capture (4) - RF Cafe


Posted on July 5, 2015

ERZIA (RF amplifiers, wireless, communications) - RF Cafe ConductRF Precision RF Test Cables - RF Cafe
Antenna Test Lab - RF Cafe
About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2018
    Kirt Blattenberger,

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:  AirplanesAndRockets.com