Dual polarized three-sector base station antenna with variable beam tilt
First Claim
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1. An antenna, comprising:
- a ground plane having an upper surface and an opposing lower surface;
a plurality of dipoles extending outwardly from the upper surface;
a set of feedlines disposed proximate the upper surface and coupled to the dipoles;
a set of striplines disposed upon the lower surface and coupled through the ground plane to the set of feedlines, andat least one sliding dielectric member adjustably disposed proximate a portion of the set of striplines and adapted to shift a phase velocity of a signal communicating therepast to the dipoles, wherein the set of striplines have a plurality of serpentine portions each having a respective said dielectric member slidingly disposed thereupon.
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Abstract
A dual polarized three-sector base station antenna with variable beam tilt in each sector. The invention advantageously provides a variable phase shifter with very small lateral dimensions which significantly reduces the diameter of a three-sector antenna. The feed network is located on both sides of the antenna ground plane, and the combination of the cable, microstrip and airstrip lines further reduces the lateral size of the antenna. Metal rings on the radome and double-bended ground plane are providing antenna with better cross-polarization and port-to-port isolation.
64 Citations
27 Claims
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1. An antenna, comprising:
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a ground plane having an upper surface and an opposing lower surface; a plurality of dipoles extending outwardly from the upper surface; a set of feedlines disposed proximate the upper surface and coupled to the dipoles; a set of striplines disposed upon the lower surface and coupled through the ground plane to the set of feedlines, and at least one sliding dielectric member adjustably disposed proximate a portion of the set of striplines and adapted to shift a phase velocity of a signal communicating therepast to the dipoles, wherein the set of striplines have a plurality of serpentine portions each having a respective said dielectric member slidingly disposed thereupon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An antenna array comprised of a plurality of antennas, each antenna comprising:
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a ground plane having an upper surface and an opposing lower surface, the ground plane having bent edges adapted to control a lateral beam lobe of the respective antenna; a plurality of dipoles extending outwardly from the upper surface wherein a portion of one of the ground plane bent edge is angled inwardly toward the dipoles at an angle less than 90 degrees with respect to the ground plane and is configured to improve a front-to-back ratio of the antenna array. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An antenna, comprising:
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a ground plane having an upper surface and an opposing lower surface; a plurality of dipoles extending outwardly from the upper surface; a set of feedlines disposed proximate the upper surface and coupled to the dipoles; a set of striplines disposed upon the lower surface and coupled through the ground plane to the set of feedlines; and at least one sliding dielectric member adjustably disposed proximate a portion of the set of striplines and adapted to shift a phase velocity of a signal communicating therepast to the dipoles; an electrically non-conductive member disposed between the ground plane and the set of striplines; and a second ground plane disposed on the electrically non-conductive member and opposing the set of striplines.
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25. An antenna array comprised of a plurality of antennas, each antenna comprising:
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a ground plane having an upper surface and an opposing lower surface; a plurality of dipoles extending outwardly from the upper surface; a set of feedlines disposed proximate the upper surface and coupled to the dipoles;
a set of striplines disposed upon the lower surface and coupled through the ground plane to the set of feedlines, andat least one sliding dielectric member adjustably disposed proximate a portion of the set of striplines and adapted to shift a phase velocity of a signal communicating therepast to the dipoles, wherein the set of striplines have a plurality of serpentine portions each having a respective said dielectric member slidingly disposed thereupon.
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26. An antenna array comprised of a plurality of antennas, each antenna comprising:
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a ground plane having an upper surface and an opposing lower surface; a plurality of dipoles extending outwardly from the upper surface; a set of feedlines disposed proximate the upper surface and coupled to the dipoles; a set of striplines disposed upon the lower surface and coupled through the ground plane to the set of feedlines, wherein the set of striplines are disposed on the electrically non-conductive member; at least one sliding dielectric member adjustably disposed proximate a portion of the set of striplines and adapted to shift a phase velocity of a signal communicating therepast to the dipoles; and a second ground plane disposed on the electrically non-conductive member and opposing the set of striplines. - View Dependent Claims (27)
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Specification