RFID front-end adaptive unit and its control method

Abstract

The invention refers to the technical field of an RFID (radio frequency identification device), and particularly discloses an RFID front-end self-adaptive unit and a control method thereof. The RFID front-end self-adaptive unit and the control method thereof are researched for solving low sensitivity of an RFID communication system for the RFID communication system is lack of effective switching measures to receive and transmitting an antenna in the prior art. The RFID front-end self-adaptive unit includes a central control unit, an emitting unit, a receiving unit, a receive-transmit switching unit and an antenna unit; the central control unit, the emitting unit, the receive-transmit switching unit and the antenna unit are electrically connected in order; the receiving unit is electrically connected with the central control unit and linked with the emitting unit in parallel; the RFID front-end self-adaptive unit is characterized by further comprising a GPIO (general purpose input / output ) control amending unit and a matching amending unit, wherein one end of the GPIO control amending unit is connected with the central control unit, and the other end thereof is connected with the matching amending unit; the matching amending unit is connected to the middle of the receive-transmit switching unit and the antenna unit in series; besides, the RFID front-end self-adaptive unit further comprises a reflective power detecting unit, wherein one end of the reflective power detecting unit is connected with the central control unit while the other end is connected with the receive-transmit switching unit.

Description

technical field [0001] The invention relates to the technical field of RFID, in particular to an RFID front-end adaptive unit and a control method thereof. Background technique [0002] The current RFID communication system of the prior art is as attached figure 1 Shown: including central control unit (also known as baseband processing unit), transmitting unit (also known as radio frequency processing unit), receiving unit (also known as radio frequency processing unit), transceiver switching unit and antenna unit. The central control unit, the transmitting unit, the transmitting and receiving switching unit and the antenna unit are serially connected in sequence, and the receiving unit is connected with the central control unit and connected in parallel with the transmitting unit. [0003] The central control unit is responsible for signal modulation and demodulation and protocol analysis, the transmitting unit and receiving unit are responsible for the transfer of digital...

AI Technical Summary

Problems solved by technology

[0005] At present, most RFID integrators only mechanically connect the antenna and the card reader together, without considering the performance loss caused by the mismatch, which reduces the efficiency of the entire system

[0006] To sum up, the current existing RFID communication system lacks effective switching measures for antenna transmission and reception, which makes the RFID communication system less sensitive.

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