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Help to Design a 55-65MHz Quadrature 3dB Coupler - RF Cafe Forums

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

Captain

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!


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

Captain


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.

http://www.responsemicrowave.com/Products_Services/hybrids_couplers.php

http://www.sagelabs.com/comp/hybrids_couplers.shtml







Posted  11/12/2012

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