Coupled sectorial loop antenna for ultra-wideband applications
First Claim
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1. An antenna structure comprising:
- a first sectorial loop antenna including two sectors and an arch therebetween; and
a second sectorial loop antenna including two sectors and an arch therebetween, wherein the first loop antenna and the second loop antenna are coupled to define a coupled sectorial loop antenna fed by a single feed, and wherein one sector of the first sectorial loop antenna and one sector of the second sectorial loop antenna combine to form a pie-slice shaped first sector of the coupled sectorial loop antenna and the other sector of the first sectorial loop antenna and the other sector of the second sectorial loop antenna combine to form a pie-shaped second sector of the coupled sectorial loop antenna.
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Abstract
A single-element antenna system that provides a wide bandwidth and consistent polarization over the frequency range to which the antenna is impedance matched. In one embodiment, the wideband antenna system includes two parallel coupled sectorial loop antennas (CSLA) that are coupled along an axis of symmetry. In another embodiment, half of the coupled sectorial loop antenna is electrically coupled to a ground plane, where the antenna includes one pie-slice shaped sector and two arches. In alternate embodiments, sections of the sector can be removed to reduce the weight of the antenna system.
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Citations
37 Claims
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1. An antenna structure comprising:
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a first sectorial loop antenna including two sectors and an arch therebetween; and
a second sectorial loop antenna including two sectors and an arch therebetween, wherein the first loop antenna and the second loop antenna are coupled to define a coupled sectorial loop antenna fed by a single feed, and wherein one sector of the first sectorial loop antenna and one sector of the second sectorial loop antenna combine to form a pie-slice shaped first sector of the coupled sectorial loop antenna and the other sector of the first sectorial loop antenna and the other sector of the second sectorial loop antenna combine to form a pie-shaped second sector of the coupled sectorial loop antenna. - View Dependent Claims (2, 3, 4)
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5. A sectorial loop antenna comprising:
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a first pie-slice shaped sector having a point;
a second pie-slice shaped sector having a point;
an arch electrically coupled to ends of the first and second pie-slice shaped sectors opposite to their points; and
a feed electrically coupled to the points of the pie-slice shaped sectors. - View Dependent Claims (6, 7)
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8. A sectorial loop antenna comprising:
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a ground plane;
a pie-slice shaped sector having a point positioned adjacent to the ground plane;
a first arch coupled to the ground plane and one side of the sector opposite to the point;
a second arch coupled to the ground plane and an opposite side of the sector opposite to the point; and
a feed electrically coupled to the point of the sector and electrically isolated from the ground plane. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A coupled sectorial loop antenna comprising:
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a ground plane;
a first pie-slice shaped sector and a second pie-slice shaped sector each having a point positioned adjacent to the ground plane and defining a pie-slice shaped open portion therebetween;
a first arch electrically coupled to the ground plane and an end of the first sector opposite to the point of the first sector;
a second arch electrically coupled to the ground plane and an end of the second sector opposite to the point of the second sector; and
a feed electrically coupled to both points of the first and second sectors and electrically isolated from the ground plane. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An antenna structure comprising:
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a ground plane;
a feed; and
an antenna, said antenna including a substrate mounted to the ground plane, a first electrical trace printed on the substrate and electrically coupled to the feed, a second electrical trace printed on the substrate and electrically coupled to the ground plane, a third electrical trace printed on the substrate and electrically coupled to the ground plane and a fourth electrical trace electrically coupled to the first, second and third electrical traces. - View Dependent Claims (30, 31)
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32. An antenna structure comprising:
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a ground plane;
a feed; and
an antenna, said antenna including a substrate mounted to the ground plane, a first antenna trace printed on a first side of the substrate and a second antenna trace printed on a second side of the substrate, said first trace including a first end electrically coupled to the feed and a second end electrically coupled to the ground plane and said second trace including a first end electrically coupled to the feed and a second end electrically coupled to the ground plane. - View Dependent Claims (33, 34, 35, 36)
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37. A coupled sectorial loop slot antenna comprising:
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a substrate;
a metallized ground plane deposited on one side of the substrate, said metallized ground plane including a first removed portion defining a separated pie-slice shaped sector of the plane electrically isolated from the remaining portion of the metallized ground plane and a second removed portion defining a second pie-slice shaped sector electrically isolated from the remaining portion of the metallized ground plane; and
a feed electrically coupled to points of the two pie-shaped sectors.
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Specification