Composite antenna device for vehicles
A composite antenna and vehicle technology, applied in the directions of antenna grounding device, antenna support/mounting device, antenna, etc., can solve problems such as height restrictions, achieve the effect of reducing common mode noise and avoiding the degradation of receiving performance
Active Publication Date: 2022-03-15
HARADA IND CO LTD
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- Description
- Claims
- Application Information
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Problems solved by technology
In the case of a composite antenna device for a vehicle, there are various restrictions such as a height restriction and a small space that must be accommodated in a case.
Method used
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Embodiment Construction
[0033] Hereinafter, modes for implementing the present invention will be described together with illustrated examples. The composite antenna device for a vehicle of the present invention is a composite antenna device for a vehicle capable of supporting multiple frequency bands. figure 1 It is a schematic diagram for explaining the structure of the composite antenna device for vehicles of the present invention, figure 1 (a) is a side view, figure 1 (b) is a top view. As shown in the figure, the vehicle composite antenna device of the present invention mainly consists of an antenna base 10, a roof conducting portion 20, a circuit board 30, an antenna element 40, a coaxial cable 50, an intermediate ground portion 60, and a circuit board ground portion 70. constitute. In addition, when the composite antenna device for a vehicle is installed in a vehicle, it is covered with a radome 1 having an internal space for accommodating an antenna element, a circuit board, and the like. ...
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The present invention provides a composite antenna device for a vehicle capable of reducing common mode noise and avoiding deterioration of reception performance. A composite antenna device for a vehicle consists of an antenna base (10), a roof conducting portion (20), a circuit substrate (30), an antenna element (40), a coaxial cable (50), an intermediate ground portion (60) and a circuit substrate The ground part (70) constitutes. The roof conduction part (20) conducts with the antenna base (10) and also conducts with the roof (R). The middle ground part (60) makes the ground wire (52) conduct with the antenna base (10) at a position closer to the roof conduction part (20) so as to have the same potential as the roof conduction part (20) . The ground portion (70) for the circuit board is arranged in such a position that the distance from the roof conduction portion (20) to the ground portion (70) for the circuit board is the same as the distance from the roof conduction portion (20) to the middle ground. The distance between the two parts (60) is the same or the distance from the roof conducting part (20) to the circuit board ground part (70) is longer than the distance from the roof conducting part (20) to the middle ground part (60) , the ground part (70) for the circuit board conducts the ground pattern (31) and the antenna base (10).
Description
technical field [0001] The present invention relates to a composite antenna device for a vehicle, and more particularly, to a composite antenna device for a vehicle capable of reducing common mode noise among composite antennas capable of handling multiple frequency bands. Background technique [0002] As a composite antenna device for a vehicle, a device capable of receiving AM broadcast and FM broadcast is generally used. In recent years, there has also been a small and low-profile antenna device called a shark fin antenna (for example, Patent Document 1). In the case of a composite antenna device for a vehicle, there are various restrictions such as a height restriction and a small space that must be accommodated in a housing. Vehicles in recent years require safety and comfort, and the installation of various information devices has been promoted. Along with this, it is necessary to cope with a plurality of frequency bands, and it is necessary to accommodate antenna el...
Claims
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IPC IPC(8): B60R11/02H01Q1/22H01Q1/32H01Q1/48H01Q21/28
CPCH01Q1/48H01Q21/28H01Q1/3275
Inventor 石田淳
Owner HARADA IND CO LTD