Small-size vehicle-mounted antenna and design method thereof

Abstract

The invention discloses a small-size vehicle-mounted antenna and a design method thereof and belongs to the field of railway communication. The small-size vehicle-mounted antenna comprises an isolation matching unit, a sending unit and a receiving unit, wherein the isolation matching unit is used for obtaining radio frequency energy with the maximum power from a transmission line and coupling the radio frequency energy into the sending unit; the sending unit is used for converting the radio frequency energy into electromagnetic energy which radiates a ground transponder; the receiving unit is used for receiving electromagnetic signals responded by the ground transponder; and sizes of the sending unit and the receiving unit are narrowed by half while performances are unchanged, so that the size of the small-size vehicle-mounted antenna is narrowed, the small-size vehicle-mounted antenna can be applied to existing locomotives, and the traffic safety and reliability of the existing locomotives are improved. According to the small-size vehicle-mounted antenna, the size of the small-size vehicle-mounted antenna is narrowed by half while performances and electrical effects are unchanged, mounting space is greatly saved, the small-size vehicle-mounted antenna can be applied to existing locomotives with narrow mounting space, reliable road surface information is provided for vehicle-mounted equipment control, and the traffic safety of the existing locomotives is further improved.

Description

technical field [0001] The invention relates to the field of railway communication, in particular to a miniaturized vehicle-mounted antenna designed to be suitable for existing locomotives and a design method thereof. Background technique [0002] The balise system is an important part of the train operation control system. The ground balise in the balise system stores relevant road surface information data. When the train passes the ground balise, the balise transmission module BTM (Balise Transmission Module) passes through the common vehicle antenna. Radiate energy to the ground transponder, activate the ground transponder, and receive the transponder information uploaded by the ground transponder at the same time, and then the on-board equipment uses the road surface information data obtained after processing the transponder information to realize safe control of the vehicle, so it can be known that the transponder The system is an important guarantee for the safe operat...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that it is difficult to install an ordinary vehicle-mounted antenna at the bottom of an existing locomotive, the present invention provides a reduced-sized vehicle-mounted antenna and its design method, whi

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