Aircraft cellular communications antenna
First Claim
Patent Images
1. An aircraft omnidirectional radiating element emitting and receiving substantially horizontal polarized energy, comprising:
- an elliptic-shaped cylinder having a first curved side and a second curved side, the radius of curvature of the first side and the second side oriented orthogonal to a longitudinal axis of the cylinder;
an elongated first port formed in the first curved side and having a longitudinal axis oriented in the direction of the longitudinal axis of the cylinder;
an elongated second port formed in the second curved side and having a longitudinal axis oriented in the direction of the longitudinal axis of the cylinder;
a first feed tab formed as a part of the elongated first port along the longitudinal axis thereof;
a second feed tab formed as a part of the elongated second port along the longitudinal axis thereof; and
a microstrip antenna feed network mounted within the cylinder and coupled to the first feed tab and the second feed tab for radiating and receiving horizontally polarized electromagnetic signals through the first port and the second port such that the antenna radiating element radiates and receives electromagnetic signals substantially omnidirectionally.
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Abstract
An elliptic-shaped cylindrical antenna radiating element having a first side and a second side includes a first rectangular slot disposed in the first side and a second port disposed in the second side. A microstrip feed network located within the antenna radiating element radiates and receives horizontal polarized electromagnetic signals through the first slot and the second slot at a phase difference of about 180 degrees. The antenna radiating element radiates and receives horizontal polarized electromagnetic signals substantially omnidirectionally.
30 Citations
14 Claims
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1. An aircraft omnidirectional radiating element emitting and receiving substantially horizontal polarized energy, comprising:
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an elliptic-shaped cylinder having a first curved side and a second curved side, the radius of curvature of the first side and the second side oriented orthogonal to a longitudinal axis of the cylinder; an elongated first port formed in the first curved side and having a longitudinal axis oriented in the direction of the longitudinal axis of the cylinder; an elongated second port formed in the second curved side and having a longitudinal axis oriented in the direction of the longitudinal axis of the cylinder; a first feed tab formed as a part of the elongated first port along the longitudinal axis thereof; a second feed tab formed as a part of the elongated second port along the longitudinal axis thereof; and a microstrip antenna feed network mounted within the cylinder and coupled to the first feed tab and the second feed tab for radiating and receiving horizontally polarized electromagnetic signals through the first port and the second port such that the antenna radiating element radiates and receives electromagnetic signals substantially omnidirectionally. - View Dependent Claims (2, 3, 4, 5)
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6. An antenna radiating element comprising:
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a first portion having a curved surface and having a first aperture including a pair of first feed tabs within said first portion; a second portion having a curved surface and having a second aperture including a pair of second feed tabs within said second portion, said second portion connected to the first portion to produce a shaped cylinder wherein the first portion and said second portion define a radiation cavity; and a microstrip antenna feed network mounted within the radiation cavity and coupled to the first feed tabs and the second feed tabs for transmitting and receiving horizontally polarized signals through the first aperture and the second aperture. - View Dependent Claims (7, 8, 9)
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10. An antenna for transmitting and receiving horizontal polarized signals and substantially rejecting vertical polarized signals comprising:
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an elliptic-shaped cylinder comprising, a first curved surface having a first slot oriented substantially along a longitudinal axis of the cylinder, and a second curved surface having a second slot oriented substantially along the longitudinal axis, the second curved surface connected to the first curved surface, the first curved surface and said second curved surface defining a cavity; and a microstrip antenna feed network positioned within the cavity for transmitting and receiving through the first slot and the second slot a horizontal polarized signal. - View Dependent Claims (11)
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12. An antenna system for use with an aircraft for communicating between the aircraft and a ground station, the antenna system comprising:
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a cylindrical antenna radiating element having a curved first side and a curved second side, the radius of curvature of the first side and the second side oriented orthogonal to a longitudinal axis of the cylinder comprising, an elongated first port having a first feed tab and disposed in the first side of the cylinder for passing electromagnetic signals the first port having a longitudinal axis oriented in the direction of the longitudinal axis of the cylinder, and an elongated second port having a second feed tab and disposed in the second side of the cylinder for passing electromagnetic signals the second port having a longitudinal axis oriented in the direction of the longitudinal axis of the cylinder; a microstrip antenna feed network coupled to the first feed tab and the second feed tab for radiating and receiving horizontally polarized electromagnetic signals through the first port and the second port whereby the antenna radiating element radiates and receives electromagnetic signals substantially omnidirectionally; and a radome substantially surrounding the antenna radiating element. - View Dependent Claims (13, 14)
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Specification