Transponder duplex multifrequency community antenna

Abstract

The invention provides a transponder duplex multifrequency community antenna, which aims at solving the problem that the double antennas mutually influence with each other and have big influence on the electromagnetic characteristic of a base station in a varying magnetic field, the single antenna transponder needs a complex filter network, and the temperature characteristic of the antenna made of copper and aluminum pipe is poor. The key point of the invention is that: a resonance circuit formed by a resonant capacitance bank and an antenna body, and the resonant frequency thereof is F1; theantenna body is formed by two semicircular copper foils on a printed-circuit board, and is inductively coupled with the base station; the antenna body and a frequency F1 isolation module work under the frequency F2 and are served as a part of a transmitting antenna and / or a oscillation loop of the frequency F2; and an energy and received information extraction module extracts energy in a double-antenna extraction mode or a single-antenna extraction mode, and extracts information in a double-antenna extraction mode or a single-antenna extraction mode. The invention is applied to the transponder.

Description

technical field [0001] The invention relates to an antenna on a transponder used on a high-speed railway, in particular to a duplex multi-frequency shared antenna for a transponder. Background technique [0002] The balise is a kind of equipment used in high-speed railway traffic control. The balise antenna is an important part of the balise. The quality of the antenna's working characteristics directly affects the reliability and safety of the balise in the process of realizing the function. [0003] At present, most transponder antennas have a dual-antenna structure. One antenna is used to receive energy and information sent by the base station, and the other antenna is used to send information to the base station. These two antennas are easy to interact with each other in a changing magnetic field. The existing single-antenna transponder still cannot get rid of the complex high-pass filter and low-pass filter network, which has complex structure and low reliability. Most...

AI Technical Summary

Problems solved by technology

Antennas made of copper tubes or aluminum tubes are easily deformed due to temperature changes, and changes in antenna dimensions will directly affect their equivalent inductance, which in turn will affect the working characteristics of the antenna resonant circuit

At the same time, since antennas made of copper tubes or copper wires need to be deformed and fixed, it is difficult to ensure their dimensional consistency in mass production, and it is necessary to connect the wires (welding, crimping or riveting) from the opening position (excitation end). ) to the printed circuit board, resulting in complex processing technology and poor work stability

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