Low profile wideband antenna array
First Claim
1. A low-profile, phased array antenna comprising a plurality of parallel plate wave guides, each of the wave guides having an open front and open ends, and a plurality of wave launchers regularly arranged in a two-dimensional array, each wave launcher being positioned in one of the parallel plate waveguides;
- each wave launcher being formed by a strip line in a circuit board.
1 Assignment
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Accused Products
Abstract
A phased array antenna having a low profile (approximately ⅛ wavelength) wide bandwidth (approximately 50%). The invention teaches making such an antenna using open channel resonators and monopole wave launchers. The wave launchers may conveniently be made on circuit card assemblies with strip lines that mimic coaxial cable monopole wave launchers. The channel resonators may be made in sections that are soldered to the circuit card assemblies. The circuit card assemblies have plated through holes that trace the edges of the resonator sections to provide electrical continuity.
179 Citations
20 Claims
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1. A low-profile, phased array antenna comprising a plurality of parallel plate wave guides, each of the wave guides having an open front and open ends, and a plurality of wave launchers regularly arranged in a two-dimensional array, each wave launcher being positioned in one of the parallel plate waveguides;
- each wave launcher being formed by a strip line in a circuit board.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A low-profile phased array antenna comprising a plurality of parallel plate wave guides, each of the wave guides having an open front and open ends, and a plurality of wave launchers regularly arranged in a two-dimensional array, each wave launcher being positioned in one of the parallel plate waveguides;
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wherein each waveguide has parallel top and bottom walls adjacent a front opening and a rear wall extending between the top and bottom walls, the wave launcher having at least one linear element parallel to the rear wall;
wherein the distance between the opening and the rear wall is approximately ⅛
of the wavelength of the signal to be transmitted or received by the antenna;
wherein one of the top and bottom walls of the wave guides includes an opening through which the respective launcher extends, the launcher comprising a strip on a printed circuit board. - View Dependent Claims (16, 17)
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18. A phased array antenna comprising an array of periodically fed, open end, parallel plate wave guides;
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wherein each waveguide includes a monopole wave launcher; and
wherein each monopole wave launcher is formed by a strip line on a circuit board. - View Dependent Claims (19, 20)
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Specification