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US 6,788,255 B2Granted
Antenna unit having radio absorbing device
AssigneesNippon Soken, Inc., Denso Corporation
InventorsKoji Sakamoto, Shinji Fukui, Shirou Koide, Akihiko Hayashi, Kazunobu Noda
Life of this patent
Estimating the term…
Abstract
An antenna unit includes a substrate having an antenna device and a radio absorbing device. The antenna device, substrate and radio absorbing device are constructed of a patch device, a conductive material and ferrite, respectively. The radio absorbing device is attached to the rear surface of the substrate. The radio absorbing device reduces incoming radio wave signals to travel to the rear surface of the substrate due to reflections by surrounding metal parts.
Claims27
An antenna unit comprising:
- a substrate made of conductive material;
- an antenna device mounted on one side of the substrate, wherein the antenna device has a ground electrode layer in contact with the one side of the substrate;
- and
- a radio absorbing device attached to another side of the substrate that is opposite to the one side,
- wherein the substrate is larger than the antenna device.
2 more elements
An antenna unit comprising:
- a substrate made of conductive material;
- an antenna device mounted on one side of the substrate;
- and
- a radio absorbing device attached to another side of the substrate only along an edge thereof.
1 more element
Dependencies are inferred from the claim text.