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Device and method for suppressing transmission carrier in rfid integrated reader

A reader-writer, integrated technology, applied in the field of radio frequency identification, can solve problems such as troublesome debugging, high cost, complex circuit, etc., and achieve the effect of simple debugging, low cost and simple circuit

Inactive Publication Date: 2016-02-24
INVENGO INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a simple circuit, simple debugging, and low cost device for suppressing the transmission carrier wave in the RFID integrated reader-writer, aiming at the defects of the above-mentioned complex circuit, troublesome debugging, and high cost in the prior art. Device and method

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  • Device and method for suppressing transmission carrier in rfid integrated reader
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  • Device and method for suppressing transmission carrier in rfid integrated reader

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Embodiment Construction

[0021] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, in the embodiment of the device and method for suppressing the carrier wave in the RFID integrated reader of the present invention, the carrier wave in the device is input by the directional coupler ( figure 1 marked 1) enters, and is entered by the through end of the directional coupler ( figure 1 Marked as 2 in the middle) is connected to the antenna; the received signal enters the receiving circuit through the antenna, the straight-through end and the isolation end of the directional coupler in turn ( figure 1 marked 3), the device also includes coupling end branches ( figure 1 Marked as 4), isolated end branch ( figure 1 Marked as 5) and a combiner; the coupling end branch 4 is connected between the coupling end of the directional coupler and an input end of the combiner, processes the transmitted carrier signal o...

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Abstract

The invention relates to a device for suppressing emitting carrier waves in an RFID (radio frequency identification) integral reader-writer. The device also comprises a coupling end branch path, an isolation end branch path and a path combiner, wherein the coupling end branch path is connected between a coupling end of a directed coupler and one input end of the path combiner, and emitting carrier wave signals coupled by the coupling end of the coupler are processed and are output to the path combiner; the isolator end branch path is connected between the isolation end of the directed coupler and the other input end of the path combiner, and emitting carrier wave signals leaked by the isolation end of the directed coupler are output to the path combiner; the output end of the path combiner outputs signals to a receiving loop. The invention also relates to a method for suppressing the emitting carrier waves. When being implemented, the method and the device for suppressing emitting the carrier waves in the RFID integral read-writer provided by invention have the following beneficial effects that the circuit is simple, the debugging is simple, and the cost is low.

Description

technical field [0001] The present invention relates to the field of radio frequency identification, and more specifically, relates to a device and method for suppressing a carrier wave in an RFID integrated reader-writer. Background technique [0002] At present, the application and promotion of RFID technology has become increasingly mature and widespread, and RFID readers are an indispensable key link of this technology, and technical research in related fields is also becoming increasingly active. Due to the particularity of the RFID principle, while receiving the signal, the transmitting channel has been transmitting the carrier signal to provide tag energy, which will inevitably cause the transmitting carrier signal to leak into the receiving channel or the receiving circuit, deteriorating the receiving quality of the signal. When the reader reads the long-distance tag, the signal sent by the reader is a high-power radio frequency signal (such as 30dBm), and the streng...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10G06K7/10
Inventor 胡建军张刚建
Owner INVENGO INFORMATION TECH
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