Wideband low profile spiral-shaped transmission line antenna
First Claim
Patent Images
1. An antenna comprising:
- a dielectric substrate;
a slow wave structure disposed on a first surface of the dielectric substrate and having a feed terminal;
a conductive element disposed on the first surface proximate the feed terminal and conductively isolated from the slow wave structure;
a top conductor disposed on a second surface, opposing the first surface of the dielectric substrate; and
a conductive via extending through the dielectric substrate for connecting the slow wave structure to the top conductor.
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Abstract
An antenna incorporating slow wave structures. The antenna comprises at least two conductive serpentine structures disposed on a dielectric substrate and further comprising an oppositely disposed conductive top plate electrically connected to the conductive serpentine structures and farther electromagnetically connected thereto. In one embodiment the antenna further comprises a ground plane below the dielectric substrate.
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Citations
30 Claims
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1. An antenna comprising:
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a dielectric substrate;
a slow wave structure disposed on a first surface of the dielectric substrate and having a feed terminal;
a conductive element disposed on the first surface proximate the feed terminal and conductively isolated from the slow wave structure;
a top conductor disposed on a second surface, opposing the first surface of the dielectric substrate; and
a conductive via extending through the dielectric substrate for connecting the slow wave structure to the top conductor. - View Dependent Claims (2, 12, 13, 14, 15, 16)
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3. An antenna comprising:
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a dielectric substrate;
a slow wave structure disposed on a first surface of the dielectric substrate;
a top conductor disposed on a second surface, opposing the first surface of the dielectric substrate; and
a first and a second conductive via disposed within the dielectric substrate and electrically connected to the top conductor, wherein the slow wave structure comprises a first and a second conductor each having a serpentine shape, and wherein a first end of the first conductor is connected to the first conductive via, and wherein a first end of the second conductor is connected to the second conductive via, and wherein a second end of the first conductor is a ground terminal for the antenna, and wherein a second end of the second conductor is a signal terminal for the antenna. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. An antenna comprising:
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a dielectric substrate;
a slow wave structure disposed on a first surface of the dielectric substrate;
a top conductor disposed on a second surface, opposing the first surface of the dielectric substrate;
a conductive via extending through the dielectric substrate for connecting the slow wave structure to the top conductor; and
wherein the top conductor comprises an elongated segment having two parallel arms extending from a first side thereof, and wherein the slow wave structure comprises a ground terminal and a feed terminal disposed along an edge of the dielectric substrate, and wherein the elongated segment is disposed approximately above the edge.
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11. An antenna comprising:
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a dielectric substrate;
a slow wave structure disposed on a first surface of the dielectric substrate;
a top conductor disposed on a second surface, opposing the first surface of the dielectric substrate;
a conductive via extending through the dielectric substrate for connecting the slow wave structure to the top conductor; and
wherein the top conductor comprises an elongated segment having two parallel arms extending from a first side thereof, and wherein the slow wave structure comprises a ground terminal and a feed terminal disposed along a first edge of the dielectric substrate, and wherein the elongated segment is disposed above a second edge of the dielectric substrate spaced apart from and parallel to the first edge.
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17. An antenna comprising:
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a dielectric substrate;
a slow wave structure disposed on a first surface of the dielectric substrate and further comprising a feed terminal and a ground terminal;
a top conductor disposed on a second surface, opposing the first surface of the dielectric substrate;
a conductive via extending though the dielectric substrate for connecting the slow wave structure to the top conductor; and
a ground plane facing and spaced apart from the first surface and electrically connected to the ground terminal. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. An antenna comprising:
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a dielectric substrate having first and second opposing surfaces;
a conductive region disposed on the first surface;
a first slow wave structure disposed on the second surface and electrically connected to the conductive region;
a second slow wave structure disposed on the second surface and electrically connected to the conductive region;
wherein a region of the first slow wave structure forms an antenna ground terminal;
wherein a region of the second slow wave structure forms an antenna feed terminal; and
a ground plane spaced apart from the dielectric substrate, wherein the second surface is oriented in facing relation to the ground plane. - View Dependent Claims (25, 26)
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27. An antenna for connecting to a communications device, comprising:
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a dielectric substrate having first and second opposing surfaces;
a conductive region disposed on the first surface;
a first slow wave structure disposed on the second surface and electrically connected to conductive region;
a second slow wave structure disposed on the second surface and electrically connected to the conductive region;
wherein a region of the first slow wave structure forms an antenna ground terminal;
wherein a region of the second slow wave structure forms an antenna feed terminal;
a ground plane spaced apart from the dielectric substrate, wherein the second surface is oriented in facing relation to the ground plane; and
a feed line extending from the feed terminal for connection to the communications device, wherein the feed line extends over and is spaced-apart from the ground plane a predetermined distance as determined by the desired performance characteristics of the antenna. - View Dependent Claims (28, 29)
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30. An antenna for connecting to a signal terminal of a communications device, comprising:
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a radiating element comprising;
a dielectric substrate;
a slow wave structure disposed on a first surface of the dielectric substrate;
a top conductor disposed on a second surface, opposing the first surface of the dielectric substrate; and
a conductive via extending through the dielectric substrate for connecting the slow wave structure to the top plate;
a feed terminal connected to the radiating element;
a ground plane underlying and spaced apart from the radiating element; and
a feed line comprising a first segment downwardly directed from the feed terminal toward the ground plane, a second segment electrically connected to the signal terminal, and a third substantially horizontal segment connecting the first and the third segments, wherein the third segment comprises a conductive plate having a predetermined width and distance to the ground plane so as to achieve the desired antenna performance parameters.
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Specification