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US 7,248,224 B2Granted
Antenna device having radiation characteristics suitable for ultrawideband communications
AssigneeAlps Electric Co., Ltd.
InventorDou Yuanzhu
Life of this patent
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Abstract
An antenna device includes a plate-shaped conductor and a radiating conductor that extends outward from an end portion of the conductor and has a length corresponding to a quarter wavelength of a first frequency. A strip-shaped slot portion formed by removing a part of the plate-shaped conductor extending inward from the end portion has a length corresponding to a quarter wavelength of a second frequency. A feed portion is perpendicular to the slot portion and crosses over the slot portion. The feed portion feeds the same signals to the slot portion and the radiating conductor.
Claims12
An antenna device comprising:
- a plate-shaped conductor;
- a radiating conductor that extends outward from an end portion of the plate-shaped conductor and has a length corresponding to a quarter wavelength of a first frequency;
- a strip-shaped slot portion that is formed by removing a part of the plate-shaped conductor extending inward from the vicinity of the end portion from which the radiating conductor extends and has a length corresponding to a quarter wavelength of a second frequency, the second frequency being different from the first frequency;
- and
- a feed portion that is disposed to be perpendicular to the slot portion and to cross over the slot portion and that feeds the same signals to the slot portion and the radiating conductor,
- wherein a polarization plane of a radiating electric field radiating from the radiating conductor and a polarization plane of a radiating electric field radiating from the slot portion are disposed to be perpendicular to each other.
3 more elements
Dependencies are inferred from the claim text.