Broadcasting antenna for vehicle and shark fin antenna apparatus having the same

摘要

A broadcasting antenna for a vehicle and a shark fin antenna apparatus having the same are provided. The broadcasting antenna includes a main board on which a feeder circuit and a ground plane are formed, a helical radiation unit which includes a plurality of helical radiators that are electrically connected to the feeder circuit and the ground plane of the main board, that are formed in a first direction, and that are coupled apart from each other by a predetermined interval, and which has a coupling feed structure, and an extended radiation unit which includes a plurality of top loaders that are electrically connected to ends of the plurality of helical radiators, respectively, that are formed in a second direction, and that are coupled to each other.

主权项

1. A shark fin antenna apparatus having a broadcasting antenna for a vehicle, which includes a main board on which a feeder circuit and a ground plane are formed and which is formed on the main board, the shark fin antenna apparatus comprising:
the broadcasting antenna that includes: a helical radiation unit which includes a plurality of helical radiators that are electrically connected to the feeder circuit and the ground plane of the main board, that are formed in a first direction, and that are coupled apart from each other by a predetermined interval, and which has a coupling feed structure; and an extended radiation unit which includes a plurality of top loaders that are electrically connected to ends of the plurality of helical radiators, respectively, that are formed in a second direction, and that are coupled to each other, the plurality of top loaders each including at least one band stop filtering unit and a plurality of conductive patterns between which the band stop filtering unit is disposed; a mobile communication antenna that is formed in an upward direction of the main board, and is formed in a P shape on one side of a dielectric board, on opposite upper surfaces of which the plurality of top loaders constituting the extended radiation unit of the broadcasting antenna are partly disposed; and a circularly polarized ceramic patch antenna that includes a patch antenna at a predetermined position on the main board on which the broadcasting antenna and the mobile communication antenna are located, and an extended ground that is formed of a metal conductor having the same shape as the patch antenna and is electrically connected with the ground plane.