Beam tilting patch antenna using higher order resonance mode
First Claim
Patent Images
1. A patch antenna comprising:
- a radiating element formed of a conductive material;
a plurality of feed lines electrically connected to said radiating element at a plurality of feed ports;
at least one phase shift circuit electrically connected to at least one of said plurality of feed lines for phase shifting a base signal to achieve a phase-shifted signal; and
said plurality of feed ports spaced apart from one another such that said radiating element is excitable at said feed ports to generate a circularly polarized radiation beam solely in a higher order mode at a desired frequency.
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Abstract
A patch antenna receives circularly polarized RF signals from a satellite. The antenna includes a radiating element. A plurality of feed lines feed the radiating element at a plurality of feed points. The feed points are spaced apart to generate a circularly polarized radiation beam solely in a higher order mode at a desired frequency. The antenna may include a plurality of parasitic structures. The feed point spacing and/or the parasitic structures tilt the radiating beam away from an axis perpendicular to the radiating element. Thus, the patch antenna provides excellent RF signal reception from satellites at low elevation angles.
80 Citations
32 Claims
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1. A patch antenna comprising:
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a radiating element formed of a conductive material; a plurality of feed lines electrically connected to said radiating element at a plurality of feed ports; at least one phase shift circuit electrically connected to at least one of said plurality of feed lines for phase shifting a base signal to achieve a phase-shifted signal; and said plurality of feed ports spaced apart from one another such that said radiating element is excitable at said feed ports to generate a circularly polarized radiation beam solely in a higher order mode at a desired frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A patch antenna comprising:
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a radiating element formed of a conductive material; a plurality of feed lines electrically connected to said radiating element at a plurality of feed ports; at least one phase shift circuit electrically connected to at least one of said plurality of feed lines for phase shifting a base signal to achieve a phase-shifted signal; said radiating element excitable at said plurality of feed ports to generate a circularly polarized radiation beam in a higher order mode at a desired frequency; and at least one parasitic structure disposed adjacent to said radiating element and separated from said radiating element. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A window having an integrated patch antenna, said window comprising:
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a pane of glass; a radiating element supported by said pane of glass and formed of a conductive material; a plurality of feed lines electrically connected to said radiating element at a plurality of feed ports; at least one phase shift circuit electrically connected to at least one of said plurality of feed lines for phase shifting a base signal to achieve a phase-shifted signal; and said plurality of feed ports spaced apart from one another such that said radiating element is excitable at said feed ports to generate a circularly polarized radiation beam solely in a higher order mode at a desired frequency. - View Dependent Claims (30, 31, 32)
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Specification