An upper laid aerial device of automobile

Abstract

A vehicle overhead antenna device of the invention relates to a vehicle receiving antenna of radio signals, which is suitable for being used as a receiving device of the radio broadcasting AM / FM. The structure includes an antenna housing, an antenna bracket, a radio receiving antenna, an antenna amplifier, a metal mounting base and a wireless signal output coaxial cable; the radio receiving antenna is arranged on the antenna bracket, the antenna bracket is arranged on the metal mounting base, one end of the radio receiving antenna is provided with an antenna signal output end, the antenna signal output end is connected with a signal input end of the antenna amplifier, a circuit board of the antenna amplifier is arranged on the metal mounting base, a signal output end of the antenna amplifier is connected with the radio receiving device by the antenna signal output coaxial cable, the antenna housing is arranged at the outside of the antenna bracket and is fixed on the metal mounting base; the antenna amplifier includes an AM frequency selection circuit, an AM signal amplification circuit, an FM frequency selection circuit, an FM signal amplification circuit, a power circuit and a wave trapping circuit.

Description

technical field [0001] The invention relates to a car roof antenna device which relates to a car radio signal receiving antenna, which is suitable for radio broadcast AM / FM (Amplitude Modulation / Frequency Modulation) as a receiving device. Background technique [0002] At present, the commonly used car antenna is a top-mounted rod antenna. Since the rod antenna is relatively long, installing it on the top of the car will affect the appearance of the whole car. In addition, common antennas are generally prone to damage. The height of the antenna is too high, and it is not convenient to use when washing cars or entering places with limited space. In addition, during the use of the antenna, the antenna rod is easy to lose, and the antenna needs to be removed during transportation, which is inconvenient. Although a shark-fin antenna with a relatively low height and a beautiful appearance has appeared, due to the limited installation position of the antenna inside the housing, t...

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used car antenna is a top-mounted rod antenna. Since the rod antenna is relatively long, installing it on the top of the car will affect the appearance of the whole car.

In addition, common antennas generally have the problem of being easily damaged. The height of the antenna is too high, and it is not convenient to use when washing cars or entering places with limited space.

In addition, during the use of the antenna, the antenna rod is easy to lose, and the antenna needs to be removed during transportation, which is inconvenient

Although there is a shark fin antenna with a relatively low height and a beautiful appearance, due to the limited installation position of the antenna inside the housing, the car antenna is relatively close to the bottom of the car, which seriously affects the antenna reception effect

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