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Old 13-Feb-2018, 2:51 AM   #118
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,288
Quote:
Originally Posted by davodavo View Post
So now: how do I make the bow-tie outperform the Yagis?
Thanks for the interesting photos of your dish.

Bowties are full wave dipoles. Since they are a collinear pair of dipoles spaced very close together, they don't have a lot of gain over a halfwave dipole. I suggest you use a stacked pair of halfwave dipoles, one above the other, fed in phase, for smaller size and greater efficiency at the focal point. A vertical spacing of 5/8 wave at the design frequency would give max gain. Adding a reflector behind the dipoles would give additional gain.

http://www.w1ghz.org/antbook/chap6-2.pdf
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Last edited by rabbit73; 13-Feb-2018 at 3:10 AM.
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