ARLA/CLUSTER: A antena é a parte mais importante do seu equipamento de rádio

[João Costa > CT1FBF]

The antenna is the most important part of radio equipment

Radio astronomers discovered a very long time ago that the antenna
system is the most important part of radio astronomy, to pick up the
faintest of very distant radio emissions in the Universe.

They started off with a 76 meter parabolic dish at Jodrell Bank in
England, and now they are focussing on the construction of 3000
fifteen-meter dishes in the Karoo for the SKA.

Radio amateurs should learn from this as they can no longer build
their own VHF transceivers, except for a few very skilled guys, but
they can still construct high gain Yagi or dish type antenna
masterpieces. It has been proven that horizontal polarization is more
effective on terrestrial VHF, UHF and SHF communications than
vertical, and also picks up less noise.

So start building a high gain horizontally polarized Yagi for your
favourite VHF band or above, and the results will more than surprise
you.

Source: The South African Radio League