Paint for the dish antennas

[Bob60]

Hello!
Does anybody know some friendly for HF ( up to 10GHz ) paint with tangents delta below 0.02 @ ~ 2GHz, epsilon around 4 @ ~ 2GHz, for dish antenna staff. Any suggestions from Andrew, Mars and ets will be appreciate.
Kind regards

 

[jiripolivka]

Hello!
Does anybody know some friendly for HF ( up to 10GHz ) paint with tangents delta below 0.02 @ ~ 2GHz, epsilon around 4 @ ~ 2GHz, for dish antenna staff. Any suggestions from Andrew, Mars and ets will be appreciate.
Kind regards

To my knowledge any paint can be used for 2 GHz parabolic dish. The thin layer does not affect the performance.
Caution , do not use aluminum-filled varnishes. As the particles of aluminum powder are not connected but insulated, if used on a parabolic dish it makes it not focusing.

One of the problems with antennas for satellite communication is that parabolic surface reflects heat to the LNB in focus. Special paint compositions absorbing IR heat are recommended.