Dual band patch antenna
First Claim
Patent Images
1. A dual band patch antenna, comprising:
- a patch conductor;
a ground conductor having a hole;
a conducting spacer for providing a space between said patch conductor and said ground conductor; and
a mandrel including an inductive portion located within the space between said patch conductor and said ground conductor, and a capacitive portion located within said hole of said ground conductor.
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Abstract
A dual band patch antenna (700) comprises a conventional patch conductor (106) having a resonant circuit (702, 704) connected between the patch conductor and a ground conductor (102). The resonant circuit (702, 704) modifies the behavior of the antenna (700) in the vicinity of its resonant frequency, thereby providing a dual band antenna in which both bands can be used simultaneously. The total radiating bandwidth of the dual band antenna is significantly greater than that of an equivalent antenna having no resonant circuits. Additional resonant circuits can be employed to provide a multi-band antenna.
154 Citations
11 Claims
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1. A dual band patch antenna, comprising:
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a patch conductor;
a ground conductor having a hole;
a conducting spacer for providing a space between said patch conductor and said ground conductor; and
a mandrel including an inductive portion located within the space between said patch conductor and said ground conductor, and a capacitive portion located within said hole of said ground conductor. - View Dependent Claims (2, 3, 4)
wherein said patch conductor has a threaded cut; - and
wherein said mandrel further includes a threaded portion cooperating with said threaded cut.
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3. The dual band patch antenna of claim 1, further comprising:
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a co-axial cable including an inner conductor connected to said patch antenna and located within said space of said patch conductor; and
an outer conductor connected to said inner conductor and extending through said ground conductor.
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4. The dual band patch antenna of claim 3, wherein said inductive portion of said mandrel is positioned between said spacer and said inner conductor.
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5. A dual band patch antenna, comprising:
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a patch conductor layer;
a ground conductor layer overlying said patch conductor layer, said ground conductor layer having a hole; and
a resonant circuit including a first set of one or more layers forming an inductor located between said patch conductor layer and said ground conductor layer, and a second set of one or more layers forming a capacitor located within said hole of said ground conductor layer.
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6. A dual band patch antenna, comprising:
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a patch conductor;
a ground conductor; and
a first resonant circuit connected to said patch conductor and unconnected to said ground conductor, wherein said ground conductor has a hole, and wherein said first resonant circuit includes a mandrel having a capacitive portion located within said hole. - View Dependent Claims (7, 8, 9, 10, 11)
wherein said patch conductor has a threaded cut; - and
wherein said first resonant circuit includes a mandrel having a threaded portion in cooperation with said threaded cut.
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8. The dual band patch antenna of claim 6,
wherein a space is defined between said patch conductor and said ground conductor; - and
wherein said first resonant circuit includes a mandrel having, an inductive portion located within the space between said patch conductor and said ground conductor.
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9. The dual band patch antenna of claim 6, further comprising:
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a second resonant circuit connected to said patch conductor and unconnected to said ground conductor, wherein said second resonant circuit is electrically coupled to said ground conductor.
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10. The dual band patch antenna of claim 6, further comprising:
a second resonant circuit connected to said patch conductor and connected to said ground conductor.
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11. The dual band patch antenna of claim 10, further comprising:
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a conducting spacer for providing a space between said patch conductor and said ground conductor, wherein said first resonant circuit is located between said conducting spacer and said second resonant circuit.
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Specification