Custom Search

More than 10,000 searchable pages indexed.

Greetings: There is so much good stuff on RF Cafe that there is no way to list or link to all of it here. Please use the Search box or the Site Map to find what you want - there is a good chance I have it. Thanks!

•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<
Job Board
About RF Cafe™
Copyright 1999-2015

help to design a 55-65MHz quadrature 3dB coupler - 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: help to design a 55-65MHz quadrature 3dB coupler Posted: Wed Jul 08, 2009 3:03 am


Joined: Fri Jun 26, 2009 6:22 am
Posts: 13
I need to design a 55-65MHz quadrature 3dB coupler for my balanced amp,maybe I have to use coax to build the circuit for the low frequency, is there anyone could give me some reference on how to build a low frequency coaxial hybrid?
Thanks a lot!


Curtis Crow
Post subject: Re: help to design a 55-65MHz quadrature 3dB couplerPosted: Sat Aug 15, 2009 11:23 am


Joined: Wed Jan 07, 2004 1:27 pm
Posts: 7
Hi fxhfzy.

You cannot make a hybrid coupler from standard shielded coax cable. If you don't want to use wound coils, maybe try this HYBRIDLINE & COUPLERLINE from Response Microwave. It is like the Wireline that Sage used to make.

Posted  11/12/2012

Your RF Cafe
Progenitor & Webmaster

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!)

5th MOB: My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website