| 摘要 |
PURPOSE: A panorama glass loop antenna device for a vehicle is provided to satisfy compact and light-weight antenna characteristics, by forming an extended radiator of a rectangular metal plate on an upper side of a patch antenna and arranging a sidewall formed with a cavity shape metal conductor around the patch antenna. CONSTITUTION: A loop antenna device for a vehicle includes a patch antenna(10,100), an extended radiator(200) and a sidewall(300). The patch antenna comprises a dielectric, a main radiator, a main grounding part(130), an extended grounding part and a feeding part. The main radiator is formed with a rectangular metal thin film. The main grounding part is formed with a rectangular metal thin film on the bottom of the dielectric. The extended grounding part is formed with a metal conductor on the substrate. The feeding part connects the main radiator and a feeding circuit on the substrate electrically. The extended radiator is arranged in a vertical direction to the top of the patch antenna, and is formed with a rectangular metal plate. The sidewall is formed with a cavity type metal conductor surrounding the patch antenna.
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