Vehicle-mounted multi-frequency integrated antenna device

Abstract

The invention relates to a vehicle-mounted multi-frequency integrated antenna device. The vehicle-mounted multi-frequency integrated antenna device comprises a 350MHz cluster mobile antenna, an 800MHz cluster mobile antenna, a 3G public mobile communication antenna, an FM antenna, a compass double-mode antenna, a GPS double-mode antenna, a 3G wide-band antenna support, a bottom board, an outer shell, a feeder line and a short circuit. The vehicle-mounted multi-frequency integrated antenna device has the advantages that the electric sizes of the 350MHz cluster mobile antenna and the 800MHz cluster mobile antenna are small, the antenna device combines the advantages of an IFA antenna structure, a reversed-F-shaped short circuit structure is connected into the receiving end of the antenna device so as to change the currents of the antenna device, and the size is reduced. The 350MHz cluster mobile antenna and the 800MHz cluster mobile antenna are of a double-frequency structure, the top of the antenna is modified to be of a slow wave structure by modifying a spiral antenna, the resonance currents change for the second time, and the characteristic of double-frequency operation is achieved.

Description

technical field [0001] The invention relates to an antenna device, in particular to a vehicle-mounted multi-frequency integrated antenna device. Background technique [0002] The car antenna is a kind of antenna installed on the car. The car antenna reception is to receive the signal transmitted by the sending device. As long as it is within the effective coverage area of ​​the signal, it can be effectively received, which is a true seamless link. Vehicle antenna refers to the mobile communication antenna designed to be installed on the vehicle, the most common is the suction cup antenna. Because the suction cup antenna is easy to install and place, the suction cup antenna is often used instead of the base antenna in some simple occasions. There are antennas in the form of shortened, quarter-wave, middle-loaded, five-eighths, and double-half wavelengths in the vehicle antenna structure. Theoretically, their efficiency increases sequentially. The antennas in the same working...

AI Technical Summary

Problems solved by technology

[0006] The antenna and integrated communication system disclosed above still have the following defects: (1) The performance of the cluster antenna in the antenna does not meet the technical requirements, and the communication distance of the cluster vehicle station using this antenna is relatively short; (2) due to the transmission of the cluster vehicle station The power is relatively large, and the area of ​​the contact point of the cluster antenna pole is relatively small, which is easy to generate arc amplification, which makes the antenna pole easy to ablate; (3) the cluster antenna is a single-frequency antenna, which cannot meet the application requirements of 800MHz cluster vehicle platform

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