Super Turnstile Antenna . The radiation power is 3 dB below the maximum radiation of a half wave dipole radiating the same power ... The design of super Turnstile Array is such that 1 to 8 bays can be constructed on the single mast.
here's your answer..
when we talk about normal lenses such as the ones are present in a pair of spectacles, we know that, work by bending light rays passing through them in order to focus the light in your eye.
in a similar way-
the gravitational field of a massive object extends far off into space, and cause light rays pass close to that object to bent and be refocused somewhere else.
the more massive the object, the stronger its gravitational field and hence the greater the bending of light rays.
(image courtesy: nasa/esa)
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