Patent ID: 6018316
Filing Date: 2000-01-25
Classification: H01Q

Abstract:
An array antenna for forming multiple, overlapping, transmission beam signals in response to transmission signals from an external signal source, the array antenna comprising:a plurality of overlapping beam subarrays, each subarray comprising;a plurality of antenna feed radiators, each antenna feed radiator having a first signal input, a second signal input and a radiator aperture, each antenna feed radiator radiating a first signal applied to the first signal input with a first polarization and radiating a second signal applied to the second signal input with a second polarization, the second polarization being orthogonal to the first polarization, whereby each antenna feed radiator can support two radiating signals from a common radiator aperture to allow orthogonally polarized subarrays to overlap; andbeam focusing means, the beam focusing means receiving the radiated signals from the plurality of antenna feed radiators and inducing required focal properties to the signals to establish a plurality of shaped transmission beam signals.