Multichannel ultrahigh radio frequency identification system

Abstract

The invention discloses a multichannel ultrahigh radio frequency identification system which comprises an RFID (radio frequency identification) reader-writer, a radio frequency switch control board and a radio frequency coaxial cable. A low-pass filter, a band-pass filter and a high-pass filter are respectively added at power ends, control ends and radio frequency signal ends of the RFID reader-writer and the radio frequency switch control board, so that power, control signals and radio frequency signals share the radio frequency coaxial cable for transmission and are not easily mutually interfered, and the system effectively solves the technical problem that an RFID reader-writer and a radio frequency switch control board are complicatedly wired and easily generate faults.

Description

technical field [0001] The invention relates to the field of wireless radio frequency, in particular to a multi-channel ultra-high frequency RFID radio frequency identification system. Background technique [0002] Such as figure 1 As shown, a traditional multi-channel UHF radio frequency identification system generally consists of an RFID reader 1' and a radio frequency switch control board 2'; the reader 1' includes a first power supply module 11', a control signal sending module 12 'and a radio frequency signal module 13'; the radio frequency switch control board 2' includes a second power supply module 21', a relay amplifier 24', a radio frequency switch module 22' and several antennas 23'. The first power supply module 11' is responsible for the power supply of the reader 1', and is electrically connected to the second power supply module 21' through a power cable 3'; the control signal sending module 12' is connected to the radio frequency switch module through N sign...

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Problems solved by technology

[0003] Specifically, assuming that the multi-channel UHF RFID system is connected with 4 antennas, that is, when X=4, log 2 4≤N2 4 + 1, then N=2, so the total number of cables used to connect the RFID reader 1' and the RF switch control board 2' inside the RFID system is: 2 signal cables, 1 power cable, 1 RF coaxial cables, which will easily lead to cumbersome system installation, redundant cables, high cable costs, and the possibility of cables being connected to wrong interfaces, resulting in a high failure rate of the product, especially when the reader 1 When the distance between ' and the RF switch control board 2' is far away, the above problems are more likely to occur

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