Thank you for visiting RF Cafe! Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Forums RF Cafe Homepage Thank you for visiting RF Cafe!

Question About Balun? - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


Tiany
Post subject: question about balun? Posted: Sat Sep 12, 2009 10:39 pm

Lieutenant

Joined: Sun Jun 07, 2009 9:14 am
Posts: 4
1.Who know the balun(T2&T3) in following picture is
1:4 or 1:9?

2.If the balun(T2&T3) is 1:4,then what is the different between this balun and another balun(T4&T5) as following picture.
.
Thanks.


Top

Jose Arrina
Post subject: Re: question about balun?Posted: Wed Sep 16, 2009 12:18 pm

Lieutenant


Joined: Thu Mar 30, 2006 9:01 am
Posts: 4
Hi Tiany:

Based on the cascode transistor configuration, I'd say those are coaxial implementations of 3dB hybrid couplers for the input and output. Length differences for input/output are for bandwidth/tuning purposes.

Sound reasonable?

_________________
... Jose' Arrina


Top

Tiany
Post subject: Re: question about balun?Posted: Thu Sep 17, 2009 8:09 am

Lieutenant

Joined: Sun Jun 07, 2009 9:14 am
Posts: 4
Thank Jose Arrina.
Do you know the impedance transform of the balun is 1:4 or 1:9?









Posted  11/12/2012

RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

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

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !

height-line