[amsat-bb] Re: Helix matching

On Fri, Sep 27, 2013 at 08:57:50AM -0400, Robert Bruninga wrote:

Why don?t we see simple ? wave 75 ohm lines used as a first step in matching a 140 Ohm Helix to 50 ohms?

The ? wave line would give an easy 112 ohms and then it shouldn?t be that hard to do a little additional construction matching to get to 140?

(building a 2.4 GHz pop-out helix that compresses flat for launch)

Clare Fowler has a neat trick

http://ww2.amsat.org/amsat/archive/amsat-bb/200001/msg00507.html

Bob, WB4APR _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb