RFID (radio frequency identification) ultrahigh-frequency reader-writer containing multichannel antenna expansion circuit

Abstract

The invention discloses an RFID (radio frequency identification) ultrahigh-frequency reader-writer containing a multichannel antenna expansion circuit, which comprises an MCU (micro processing unit) processor, a radio-frequency circuit unit, a multichannel antenna expansion circuit and a plurality of antenna ports, wherein the MCU processor, the radio-frequency circuit unit, the multichannel antenna expansion circuit and the plurality of antenna ports are sequentially connected, and the MCU processor is connected with the multichannel antenna expansion circuit so as to select one channel as the current operating channel. Compared with the prior art, by using the ultrahigh-frequency reader-writer disclosed by the invention, the operation of the plurality of antenna ports can be implemented, thereby achieving an effect of total-area coverage; meanwhile, because of only increasing the multichannel antenna expansion circuit, the ultrahigh-frequency reader-writer disclosed by the inventionalso has the advantages of simple circuit, low cost, high performance index, and the like.

Description

technical field [0001] The invention relates to the field of RFID ultra-high-frequency reader-writers, and more specifically relates to an ultra-high-frequency reader-writer within the UHF864-928M range containing a multi-channel antenna expansion circuit. Background technique [0002] In the traditional radio frequency identification system, it generally adopts a single-channel coverage method, which only corresponds to one antenna port. However, due to the gain of the external antenna and the directional constraints of the radio frequency signal beam, the existing radio frequency identification system cannot Realize the effective field strength coverage of the whole area or a certain range. [0003] As an industrial application today, an effective field strength coverage has become an indispensable function. Although there are some multi-channel solutions in the prior art, the common problems are complex circuits, high cost, and unguaranteed circuit stability and performan...

AI Technical Summary

Problems solved by technology

[0002] In the traditional radio frequency identification system, it generally adopts a single-channel coverage method, that is, it only corresponds to one antenna port, but due to the gain of the external antenna and the directional constraints of the radio frequency signal beam, the existing radio frequency identification system cannot Realize the effective field strength coverage of the whole area or a certain range

[0003] As an industrial application today, an effective field strength coverage has become an indispensable function. Although there are some multi-channel solutions in the prior art, the common problems are complex circuits, high cost, and unguaranteed circuit stability and performance. Poor indicators (such as unavoidable signal attenuation and increased power consumption), which brings great problems to the application of large-area and large-scale coverage of the reader

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