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[Amps] high power dual directional coupler

To: amps@contesting.com
Subject: [Amps] high power dual directional coupler
From: Geert PA3CSG <pa3csg@hoeplakee.nl>
Date: Thu, 16 Jan 2014 07:28:46 +0100
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Hello!

I am looking for a design of a directional coupler for HF, 1.8 to 30 MHz or if possible 50 MHz. Sofar I tried the original Bruene, that was not referenced to ground, and a tandem coupler were I "smoked" the toroid after a while.
I tried to work one out in LT spice but I don't trust my spice skills ....

Demands:

Frequency range 1.8 - 30 MHz
Several Kw
Coupling in the range of 30dB or more
High directivity
Dual coupling to do Pwr / SWR measurements.

A "how to design" or a complete design would be nice.

Thank you!

73 Geert PA3CSG


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