Low-profile, integrated radiator tiles for wideband, dual-linear and circular-polarized phased array applications
First Claim
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1. An integrated radiator tile for use in a phased array antenna, comprising:
- a bottom dielectric layer having a ground plane disposed on an exposed surface, and having first and second via transitions formed through the bottom dielectric layer;
a coupling circuit layer adjacent to the bottom dielectric layer comprising 90°
hybrid coupler circuits respectively coupled to the first and second via transitions;
a balun layer adjacent to the coupling circuit layer comprising lower and upper ground planes formed on opposite surfaces, 180°
hybrid coupler circuits, a plurality of RF transitions selectively connected between the 180°
hybrid coupler circuits and the 90°
hybrid coupler circuits, and a plurality of radiator to RF transitions coupled to the 180°
hybrid coupler circuits;
a plurality of grounding vias interconnecting the lower and upper ground planes of the balun layer, a plurality of grounding vias interconnecting the lower ground plane of the balun layer and the ground plane of the bottom dielectric layer, and a plurality of grounding vias surrounding each of the radiator to RF transitions;
a stacked disk radiator adjacent to the balun layer comprising a dielectric puck having an active radiator formed on an upper surface, an upper dielectric layer adjacent to the active radiator, a parasitic radiator adjacent to the upper dielectric layer, and a pair of excitation probes coupled between the radiator to RF transitions and the active radiator.
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Abstract
A planar, low-profile, very wide frequency bandwidth, wide-scan, dual-linear or circular-polarized phased array antenna using integrated stacked-disc radiator tiles. The stacked-disc radiator configuration comprises a lower active radiator fed by a pair of probes for each polarization state, and a parasitic radiator separated from the active radiator by dielectric material. The stacked-disc radiator is integrated with its multi-layer feed circuits in a very compact package. The feed circuits include 90° hybrid coupler circuits and 180° hybrid coupler circuits that couple dual linear or dual circular polarized energy to and from the disk radiators.
72 Citations
20 Claims
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1. An integrated radiator tile for use in a phased array antenna, comprising:
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a bottom dielectric layer having a ground plane disposed on an exposed surface, and having first and second via transitions formed through the bottom dielectric layer; a coupling circuit layer adjacent to the bottom dielectric layer comprising 90°
hybrid coupler circuits respectively coupled to the first and second via transitions;a balun layer adjacent to the coupling circuit layer comprising lower and upper ground planes formed on opposite surfaces, 180°
hybrid coupler circuits, a plurality of RF transitions selectively connected between the 180°
hybrid coupler circuits and the 90°
hybrid coupler circuits, and a plurality of radiator to RF transitions coupled to the 180°
hybrid coupler circuits;a plurality of grounding vias interconnecting the lower and upper ground planes of the balun layer, a plurality of grounding vias interconnecting the lower ground plane of the balun layer and the ground plane of the bottom dielectric layer, and a plurality of grounding vias surrounding each of the radiator to RF transitions; a stacked disk radiator adjacent to the balun layer comprising a dielectric puck having an active radiator formed on an upper surface, an upper dielectric layer adjacent to the active radiator, a parasitic radiator adjacent to the upper dielectric layer, and a pair of excitation probes coupled between the radiator to RF transitions and the active radiator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An antenna comprising:
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a plurality of integrated radiator tiles abutting each other that form an array, each integrated radiator tile comprising; a bottom dielectric layer having a ground plane disposed on an exposed surface, and having first and second via transitions formed through the bottom dielectric layer, a coupling circuit layer adjacent to the bottom dielectric layer comprising 90°
hybrid coupler circuits respectively coupled to the first and second via transitions;a balun layer adjacent to the coupling circuit layer comprising lower and upper ground planes formed on opposite surfaces, 180°
hybrid coupler circuits, a plurality of RF transitions selectively connected between the 180°
hybrid coupler circuits and the 90°
hybrid coupler circuits, and a plurality of radiator to RF transitions coupled to the 180°
hybrid coupler circuits;a plurality of grounding vias interconnecting the lower and upper ground planes of the balun layer, a plurality of grounding vias interconnecting the lower ground plane of the balun layer and the ground plane of the bottom dielectric layer, and a plurality of grounding vias surrounding each of the radiator to RF transitions; a stacked disk radiator adjacent to the balun layer comprising a dielectric puck having an active radiator formed on an upper surface, an upper dielectric layer adjacent to the active radiator, a parasitic radiator adjacent to the upper dielectric layer, and a pair of excitation probes coupled between the radiator to RF transitions and the active radiator. - View Dependent Claims (17, 18, 19, 20)
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Specification