Hi Bill,

In article ,
says...


On 12 Feb 2004 12:39:06 -0600, (R. Torsten
Clay) wrote:

A yagi can be made with a direct dipole feed, which is very simple.

Please explain how. All the yagis I've heard of have a very low
feedpoint impedance. How do you use 50 ohm coax without a matching
device of some kind?

It all depends how you tune the yagi. For example,
a two-element yagi with about 0.2 wavelength spacing,
with a reflector approximately 5% longer than the
driven element will offer a very good match to
50 ohm coax (according to EZNEC). Costs only a few
tenths of a dB in forward gain to get that match.

73,
Bob
K3PH

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