Low profile antenna for satellite communication
First Claim
Patent Images
1. An antenna system comprising:
- at least two antenna arrangements, each having at least one port, and all ports connected through transmission lines in a combining/splitting circuit,wherein said antenna arrangements form a spatial element array able to track a target in an elevation plane by mechanically rotating the antenna arrangements about transverse axes giving rise to generation of respective elevation angles and changing the respective distances between said axes in a predefined relationship at least with the respective elevation angles;
said combining/splitting circuit provides phasing and signal delay in order to maintain preconfigured radiating parameters.
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Abstract
A low profile receiving and/or transmitting antenna includes an array of antenna elements that collect and coherently combine millimeter wave or other radiation. The antenna elements are physically configured so that radiation at a predetermined wavelength band impinging on the antenna at a particular angle of incidence is collected by the elements and collected in-phase. Two or more mechanical rotators may be disposed to alter the angle of incidence of incoming or outgoing radiation to match the particular angle of incidence.
137 Citations
37 Claims
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1. An antenna system comprising:
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at least two antenna arrangements, each having at least one port, and all ports connected through transmission lines in a combining/splitting circuit, wherein said antenna arrangements form a spatial element array able to track a target in an elevation plane by mechanically rotating the antenna arrangements about transverse axes giving rise to generation of respective elevation angles and changing the respective distances between said axes in a predefined relationship at least with the respective elevation angles; said combining/splitting circuit provides phasing and signal delay in order to maintain preconfigured radiating parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An antenna system including:
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at least two antenna arrangements mounted on a common rotary platform, using a carriage for each arrangement which provides mechanical bearing for an axis perpendicular to the elevation plane of the antenna arrangement, to thereby provide its elevation movement; wherein the axes of rotation of all antenna arrangements are parallel each to other; two rails joined with the carriages are mounted on the rotary platform at their bottom side, and driving means providing linear guided movement of the axes of rotation in direction perpendicular to the axes of rotation of the antenna arrangements.
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17. An antenna assembly for satellite tracking system comprising:
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at least two antenna arrangements forming a spatial element array capable of dynamic tracking a target in an elevation plane by mechanically dynamically rotating the antenna arrangements about transverse axes giving rise to generation of respective elevation angles, and dynamically changing the respective distances between said axes while maintaining a predefined relationship between said distances and respective elevation angles; said antenna arrangement each having at least one port, and all ports connected to at least one combining/splitting circuit providing phasing and signal delay in order to maintain preconfigured radiating parameters. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. An antenna assembly for satellite tracking system including at least two antenna arrangements mounted on a common rotary platform, using a carriage for each arrangement which provides mechanical bearing for an axis perpendicular to the elevation plane of the antenna arrangement, to thereby provide its dynamic elevation movement;
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wherein the axes of rotation of all antenna arrangements are parallel each to other; and two rails joined with the carriages are mounted on the rotary platform at their bottom side, driving means providing linear guided movement of the axes of rotation in direction perpendicular to the axes of rotation of the antenna arrangements in a predefined relationship at least with the respective elevation movement.
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36. An antenna assembly for satellite tracking system comprising:
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at least two antenna arrangements each accommodating a transverse axis; a mechanism for rotating the arrangements in order to track a target in an azimuth plane, and rotating each arrangement about its transverse axis in order to dynamically track the target in an elevation plane, the system further includes at least one of the following; a) a mechanism for dynamically changing distance between the transverse axes so as to maintain substantially no gaps between antenna apertures as viewed for any elevation angle within selectable elevation angle range; b) a mechanism for dynamically changing distance between the transverse axes, so as to maintain substantially no gaps between antenna apertures for any location where a target is in the field of view of the antenna system; and c) a mechanism for dynamically changing distance between the transverse axes, while maintaining antenna gain and side lobes level within a predefined range for any elevation angle within a predefined range of elevation angles. - View Dependent Claims (37)
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Specification