LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old November 24th 03, 07:53 PM
Posts: n/a
Default 50r pcb stripline width??

ok..i know the width of track for 50r pcb stripline using standard 1/16in
fibreglass pcb is 2.8mm but howabout 1/8in pcb???
or does anyone have programe that works this out? (for dos/windows .)
reason for asking making high power swr meter and i have a large sheet of
1/8 in pcb i need to use....


  #2   Report Post  
Old August 11th 10, 01:48 PM
Junior Member
First recorded activity by RadioBanter: Aug 2010
Location: South Australia
Posts: 3

Stripline has a ground plane on both sides. Microstripline only one.
For microstripline:-

Z0 = √L/C = 377 x (t/w) x Er^-0.5

t is thickness of board, w is width of strip and Er is relative dielectric constant of material which for most PCB is between 4 and 5. I use 4.5.
50 ohm stripline is certainly about 2.8mm but micro-stripline, ie. one side of a PCB, is 6mm for about 47 ohms.
Because t/w is a ratio, you can use mm, inches or cubits if you want.
In any case, because SWR pickups are such a small percentage of a wavelength, (good readings can be obtained from 1/40 wavelength), the values are simply not critical. Plugs, sockets and solder will probably have a much greater effect.

Last edited by vk5ajl : August 11th 10 at 01:52 PM Reason: Forgot something.

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
vhf pcb stripline swr plans wanted. zindazenda Homebrew 7 August 27th 10 07:58 PM
vhf pcb stripline swr plans wanted. zindazenda Homebrew 1 August 11th 10 08:01 AM
stripline for 13.56 MHz Massi Antenna 14 February 4th 04 11:12 PM
50r pcb stripline width?? zindazenda Homebrew 8 November 25th 03 02:03 AM

All times are GMT +1. The time now is 05:53 PM.

Powered by vBulletin® Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright 2004-2017 RadioBanter.
The comments are property of their posters.

About Us

"It's about Radio"


Copyright © 2017