On: Ham radio operators receive signals from Voyager 1 on Dwingeloo telescope

[viraptor]

> If you're standing behind it, nothing

Is there actually no back lobe on dishes that size? Or is it just extremely small?

[sbierwagen → viraptor]

Not zero. Even a full Faraday cage only has 90dB or so of attenuation. But measuring it would be darn hard, since the attenuated signal would be swamped by diffraction, skyscatter and reflection by nearby objects of the stronger side lobes.