Three-dimensional channel device for special-shaped antenna

Abstract

The invention relates to a three-dimensional channel device of a special-shaped antenna, which includes a power supply module; a radio frequency reader whose input end is connected to the output end of the power supply module; a time division multiplexing module whose input end is connected to the output end of the radio frequency reader; and two two special-shaped antenna groups, which are connected to the output of the time division multiplexing module; one of the two special-shaped antenna groups includes two parallel antenna frames that generate the same magnetic field direction and have a distance, and the other includes two parallel antenna frames that generate magnetic field directions that are opposite and have a Two parallel antenna frames at a distance; among them, the power module is used to provide power, the RF reader is used to generate radio frequency signals and control signals, and the time division multiplexing module is used to transmit radio frequency signals to two special-shaped antennas under the action of control signals Group, two special-shaped antenna groups are used to send out the radio frequency signal to detect the surrounding radio frequency tags and feedback signals to the radio frequency reader when the radio frequency tags are detected. The invention can improve the detection efficiency of the label and reduce the cost.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification (RFID, Radio Frequency Identification), in particular to a three-dimensional channel device for a special-shaped antenna. Background technique [0002] The RFID system generally mainly includes a reader-writer that controls radio-frequency signal transmission, reception, and information processing, a radio-frequency antenna that matches the reader, and a radio-frequency tag that needs to be detected and identified. During normal operation, the reader is responsible for sending data commands encoded according to a certain protocol. After passing through the internal modulation and power amplifier circuit of the reader, it will generate a certain power RF signal with commands, which will radiate to the RF antenna through the RF antenna. In a certain surrounding area, when a qualified radio frequency tag enters the magnetic field area, the energy carried by the magnetic field w...

AI Technical Summary

Problems solved by technology

The distribution of the six antenna arrays is generally three rectangular frame antennas on both sides of the channel, there will be a certain overlap between the three antennas, and in order to achieve no blind area reading, there will be a power divider and an antenna switching unit to perform the corresponding antennas. Control work, in the process of antenna switching and power distribution, it will take a long polling time, and the transmission power of the reader will be correspondingly weakened, and the corresponding detection distance will be reduced

The distribution of the four-antenna array is similar to that of the six-antenna array, except that the overlapping area of ​​the upper and lower frames of the four-antenna array is larger, the readable range of the tag and the detection effect will be reduced to a greater extent, and the rotation training work is one The cycle time is longer, and the phenomenon of missed reading or incomplete reading when detecting more tags is more serious

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