For local 10Ghz ATV, I use a 20 mW Gunn module.
This module is bolted to a 20 dB horn antenna.
The antenna is made of 0.8mm stainless steel sheet.
Two sheets where cut , bend and soldered to a piece of
WG16 wave guide with flange.
There is a piece of Polystyrene foam glued in the horn,
to prevent access to birds or insects.
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