Integrated Vehicle Antenna Feedback System

Abstract

The invention provides an integrated vehicle-mounted antenna feed system, comprising an antenna (1) and an antenna base (12), and the lower end surface of the cavity of the antenna base (12) is fixedly installed on the vehicle body shell (11) through bolts (10). ); characterized in that, the antenna base (12) is provided with an antenna tuner (2). The antenna tuner (2) realizes the integrated design of the antenna tuner (2) and the antenna by adopting a tuning method combining impedance transformation and an inductive network. Its outstanding beneficial effect is that, firstly, the feeder is omitted, the RF signal loss is significantly reduced, and the distribution parameters and insertion loss caused by the use of too many discrete devices are avoided; the effective reduction of the loss significantly improves the radiation efficiency of the antenna, and makes the relative radiation efficiency of the antenna more efficient. High, improve the communication distance. Thirdly, the reliability of the vehicle radio communication system is improved, the installation and maintenance are convenient, especially the maintenance time is saved in wartime, and the communication time can be guaranteed to be long enough.

Description

technical field [0001] The invention belongs to the technical field of short-wave communication, relates to radio communication, and in particular to an integrated vehicle-mounted antenna feeder system. Background technique [0002] In the existing vehicle radio communication antenna feeder system, it includes an antenna tuner (referred to as "antenna"), a whip antenna (referred to as "antenna"), and a radio frequency feeder (referred to as "feeder") for connecting the antenna and antenna. Usually, in order to facilitate the installation of the tuner and the antenna, the tuner is often installed inside the communication car, and the antenna is installed on the car shell outside the communication car, and the two are connected by a long radio frequency feeder. Vehicle radio communication antenna feeder system (referred to as "antenna feeder system"), such as figure 1 As shown, the antenna tuner, feeder and antenna of the existing antenna feeder system are not integrated toge...

AI Technical Summary

Problems solved by technology

[0003] The problem existing in the existing technology is: the communication quality effect will become very poor, which will affect the communication distance

Specifically, the connection method of the existing technology will cause a certain loss of signal radiation energy and reduce the radiation efficiency. The RF connection cable from the output end of the antenna to the antenna has constituted a part of the antenna radiator and will be affected by the metal car. shell shield

Usually the RF energy lost per meter is -3dB, and the radio power will be lost by half

If the RF cable is extended and routed close to the car shell, the power delivered to the antenna is only about 20% of the output power of the radio station, and the visible loss is even greater; the second is that the antenna radiator is composed of the RF connecting cable and the antenna. It is no longer a regular "L"-shaped antenna structure, which will seriously affect the radiation of the signal, and the communication quality will become very poor, affecting the communication distance

The third is that the antenna tuning network of the existing antenna feeder system uses binary inductors and binary capacitors to form antenna tuning networks similar to "Γ" and "П". Due to the excessive use of discrete devices, the insertion loss of discrete devices for radio frequency signals Large, often the RF power has lost part of the power when it does not reach the antenna radiation

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