Feed device for a sweep beam array antenna
First Claim
1. A feed device for a sweep beam array antennae, the elementary antennae of said array being spaced apart by an elementary interval and divided into several sub-arrays overlapping at their ends, comprising:
- means for forming a plurality of elementary groups, each comprising N antennae of said sub-arrays and having N inputs and N outputs, andmeans for combining together an arbitrary number of said elementary groups comprising MN antennae, where M is a whole number greater than N, these means including a number of outputs N equal to the number of inputs of said forming means to which they are connected, and M inputs connected to an energy distributor, spacing between two said sub-arrays being equal to N elementary intervals, said means for combining including a plurality of adder distributor means, each having N outputs coupled to said N inputs of a respective one of said elementary groups, and each having M inputs, each one of said plurality of adder distributor means including weighting means for delivering on said adder distributor means N outputs weighted sums of energies received on said adder distributor means M inputs.
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Accused Products
Abstract
A feed device for a sweep beam array antenna which has a plurality of elementary antennae combined into a plurality of sub-arrays having a predetermined overlap at their ends. Each sub-array includes a plurality of elementary groups, each elementary group including N elementary antennae. Each elementary group is fed by a feed circuit having N inputs and N outputs. Circuitry is provided for grouping together an arbitrary number of said elementary groups to form an assembly comprising MN elementary antennae, where M is greater than N, and MN antennae are the number of antennae in a sub-array. This circuitry is connected to an energy distributor and includes a plurality of divider distributor circuits, each one coupled to an output of the energy distributor. Each divider distributor circuits has M outputs. The circuitry also includes a plurality of adder distributor circuits, each one having N outputs coupled to the N inputs of a respective one of said elementary groups. Each adder distributor circuit has M inputs which are coupled to the M outputs of predetermined ones of the divider distributor circuits according to a predetermined, periodic law.
22 Citations
14 Claims
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1. A feed device for a sweep beam array antennae, the elementary antennae of said array being spaced apart by an elementary interval and divided into several sub-arrays overlapping at their ends, comprising:
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means for forming a plurality of elementary groups, each comprising N antennae of said sub-arrays and having N inputs and N outputs, and means for combining together an arbitrary number of said elementary groups comprising MN antennae, where M is a whole number greater than N, these means including a number of outputs N equal to the number of inputs of said forming means to which they are connected, and M inputs connected to an energy distributor, spacing between two said sub-arrays being equal to N elementary intervals, said means for combining including a plurality of adder distributor means, each having N outputs coupled to said N inputs of a respective one of said elementary groups, and each having M inputs, each one of said plurality of adder distributor means including weighting means for delivering on said adder distributor means N outputs weighted sums of energies received on said adder distributor means M inputs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A feed device for a sweep beam array antennae which has a plurality of elementary antennae combined into a plurality of elementary groups, each elementary group having N elementary antennae and N inputs, comprising:
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energy distributor means adapted to receive input energy and having a plurality of outputs; a plurality of divider distributor circuits, each one coupled to a respective one of said energy distributor means outputs and having M outputs, M being greater than N; and a plurality of adder distributor circuits, each one having N outputs coupled to the N inputs of a respective one of said elementary groups, and M inputs coupled to the M outputs of predetermined ones of said divider distributor circuits according to a periodic law, each one of said plurality of adder distributor circuits including weighting means for delivering on said N outputs weighted sums of energies received on said M inputs. - View Dependent Claims (11, 12, 13, 14)
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Specification