Communications: radio wave antennas – Antennas – With vehicle
Reexamination Certificate
1999-08-16
2001-05-08
Wong, Don (Department: 2821)
Communications: radio wave antennas
Antennas
With vehicle
C343S867000
Reexamination Certificate
active
06229492
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an antenna device for an automotive vehicle. More particularly, it relates to an antenna device for automotive vehicle, in which the antenna and accompanying elements are installed inside a mirror case for the automotive vehicle, thereby obviating the problem that the antenna is curved by air resistance and increasing reception sensitivity level of radio signals.
2. Description of the Prior Art
Generally, the car has an audio system for providing the driver with information about traffic conditions and comfortable environment. Nowadays, the audio system is installed in a car as a basic part. Drivers can listen to music or news through the car audio system. They can avoid boring conditions due to long drives and select the optimal driving course referring to the traffic news information.
The audio system requires an antenna to receive radio signals. The dipole antenna is generally installed on the outside of the car and driven by an electric motor.
In this conventional dipole antenna, however, there are the problems that the antenna is curved by air resistance when the car is driving at a high speed and reception sensitivity level of radio signals is lowered.
To solve the problems, an antenna installed in the windshield glass of the car in the form of the pattern is provided. Because the antenna made of copper or silver paster is patterned and formed in the windshield glass, it can not be bent by the wind during the drives.
The antenna formed in the windshield glass has a problem that static electricity produced by friction between the wind and windshield glass is acting as electrical noises thereby the quality of the reception signal is degraded.
SUMMARY OF THE INVENTION
Therefore the object of the present invention is to provide an antenna device for an automotive vehicle, in which an antenna and accompanying elements are installed in a sideview mirror case or a rearview mirror case, thereby obviating the problem that the antenna is curved by air resistance when the car is driving.
The another object of the present invention is to provide an antenna device for an automotive vehicle, in which reception sensitivity level of radio signals is increased by arranging several antennas in vertical and horizontal direction according to the electomagnetive radio wave signals.
The above object has been achieved by the present invention, which provides an antenna device for an automotive vehicle comprising:
a first coil installed horizontally to receive radio signals, capacitors connected with the first coil in electrical parallel,
a second coil connected electrically with the first coil and installed horizontally under the first coil,
a third coil connected electrically between the first coil and the ground and installed horizontally under the first coil, and
a fourth coil connected electrically between the first coil and the second coil and installed vertically under the first coil,
and characterizing that from the first to the fourth coils and capacitors are installed in a mirror case for the automotive vehicle.
Further, according to the present invention, an antenna device for an automotive vehicle is provided, comprising:
a power source for supplying the electricl power;
an antenna for receiving radio signals by means of a cored coil;
a band pass filter for permitting a certain frequency range component of the received signals from the antenna to pass through;
an amplifier for amplifying the filtered signal from the band pass filter;
and characterizing that the antenna, the band pass filter and the amplifier are installed in a mirror case for the automotive vehicle.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other adventages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
REFERENCES:
patent: 4760394 (1988-07-01), Takeuchi et al.
patent: 5231408 (1993-07-01), Nakase
patent: 5504478 (1996-04-01), Knapp
patent: 5581264 (1996-12-01), Tabata et al.
patent: 5999134 (1999-12-01), Dishart et al.
patent: 6008766 (1999-12-01), Maedae et al.
patent: 2425189 (1974-12-01), None
patent: 0540899 (1993-05-01), None
Lee Yong Ho
Sung Byung Yong
Jacobson Price Holman & Stern PLLC
Poong Jeong Industrial Co., Ltd.
Tran Thuy Vinh
Wong Don
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