Aerial Photography - Modern

This is a puzzle. On the face of it a screen has been fitted underneath and to the sides of a high gain yagi. But the screen is so close to the aerial that it is ‘invading its space’ – it is inside the aerial's capture area so it will have a seriously detrimental effect on the aerial’s performance. And the aerial doesn’t appear to have a dipole or reflector!

Anyone got any ideas about this one?

And would the original contributor contact me? I don’t have your name for a credit.

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