[TowerTalk] Hi-Tech Station Cost

[i4jmy@iol.it]

A well designed quad has only a slight gain over the same boom yagi and 
as much as the boom lenght increases, that gain becomes neglegible 
since the equivalent capture areas of the 2 antennas tend to overlap.
To gain some 4 dB over a 2 elemnts yagi the boom of a quad antenna 
should be about .8 wl long, but alraedy a yagi with such boom has the 
same gain.
Concerning the elevation angles, no way an horizontally polarized quad 
antenna sharpens vertical patterns and behaves different than a yagi 
placed at the equivalend quad height (middle). 
The basical adventage of a 2 elements quad over a 2 element yagi might 
be a better F/B and a much better immunity to rain static.
The other side of the horse is a much weaker mechanical structure to 
deal with.

73,
Mauri I4JMY

  





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