[amsat-bb] Helix matching

Robert Bruninga bruninga at usna.edu
Fri Sep 27 05:57:50 PDT 2013

Why don’t we see simple ¼ wave 75 ohm lines used as a first step in
matching a 140 Ohm Helix to 50 ohms?

The ¼ 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)


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