Electrically small low profile switched multiband antenna
First Claim
1. An antenna comprising:
- a patterned ground plane;
a first antenna element disposed in spaced relation to said patterned ground plane;
a feed terminal coupled to said first antenna element;
wherein said patterned ground plane comprises a reentrant perimeter that extends inward underneath at least a portion of said first antenna element, whereby said at least portion of said first antenna element does not overlie said ground plane;
said first antenna element further comprising a slot, wherein a current pattern established by feeding said first antenna element via said feed terminal includes a current flow that flows, at least partly, around said slot.
2 Assignments
0 Petitions
Accused Products
Abstract
A small volume antenna (100) has the form of a polygonal (e.g., square) board with multiple antenna elements (104, 110) located at vertices (114, 116) (e.g., opposite vertices). The antenna elements (104, 110) include two segments (118, 120, 124, 126) that meet at corners (122, 128) that are located at the vertices (114, 116). Peripheral portions (134, 136, 138, 140) of a ground plane (132) that underlie the segments (118, 120, 124, 126) of the antenna elements are deleted, and slots (154, 162) that have two joined segments (156, 158, 164, 166) that parallel the segments (118, 120, 124, 126) of the antenna elements (104, 110) are formed in the antenna elements. The antenna elements (104, 110) are selectively loaded by switched impedance (e.g., capacitance) networks (172, 176, 178, 180, 182, 186, 190, 192). The antenna (100) is able to support operation in at least two broad operating bands.
21 Citations
18 Claims
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1. An antenna comprising:
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a patterned ground plane;
a first antenna element disposed in spaced relation to said patterned ground plane;
a feed terminal coupled to said first antenna element;
wherein said patterned ground plane comprises a reentrant perimeter that extends inward underneath at least a portion of said first antenna element, whereby said at least portion of said first antenna element does not overlie said ground plane;
said first antenna element further comprising a slot, wherein a current pattern established by feeding said first antenna element via said feed terminal includes a current flow that flows, at least partly, around said slot. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An antenna comprising:
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a ground plane;
a first antenna element disposed in spaced relation to said ground plane, said first antenna element comprising a slot;
a feed terminal coupled to said antenna element;
wherein a current pattern established by feeding said first antenna element via said feed terminal includes a current flow that flows, at least partly around said slot;
a network comprising a switch and a reactive load;
wherein said network is coupled between said first antenna element and said ground plane and wherein said network is coupled to said first antenna element at a position selected such that said current that flows, at least partly, around said slot is coupled through said network when said switched is closed. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification