On-vehicle antenna having wide frequency range
AssigneeAlps Electric Co., Ltd.
InventorToshiyuki Takahashi
Life of this patent
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Abstract
An antenna includes at least two radiating conductors disposed in parallel and having different lengths, a feeding conductive section connected to the radiating conductors at the same-side ends in the parallel direction of the radiating conductors, and a grounding conductive plate disposed almost in parallel to the radiating conductors. In the antenna, a plurality of resonance points are generated by the plurality of radiating conductors having different lengths, the overall frequency characteristics of the antenna are improved in the frequency bands corresponding to the plurality of resonance points, and the operation frequency band of the antenna is widened.
Claims18
An antenna comprising:
- at least two radiating conductors disposed in parallel and having different lengths, the radiating conductors having a first gap therebetween;
- a feeding conductive section connected to said radiating conductors at one end, the feeding conductive section extending in direction perpendicular to a parallel direction of said radiating conductors;
- and
- a grounding conductive plate disposed substantially in parallel to said radiating conductors, the grounding conductive plate separated from the radiating conductors by a second gap in the direction perpendicular to the parallel direction of the radiating conductors, a width of the grounding plate being smaller than a combined width of the radiating conductors and the first gap.
Dependencies are inferred from the claim text.