UHF RFID reader antenna and switching method

An antenna switching and reader technology, which is applied to antennas, antenna arrays, antenna components, etc., can solve the problems of blind reading areas, small reading coverage areas, limitations, etc., so as to increase the reading coverage area and increase the system. complexity, added cost and effect of

Active Publication Date: 2019-08-16
BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its energy distribution in the near-field area (within 30cm) is concentrated or uneven, resulting in a small reading coverage area or a reading blind area, which makes the UHF frequency band restricted in RFID applications in near-field or near-field and far-field scenarios. limit

Method used

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  • UHF RFID reader antenna and switching method
  • UHF RFID reader antenna and switching method
  • UHF RFID reader antenna and switching method

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] In order to improve the near-field coverage area of ​​the UHF RFID reader antenna, the embodiment of the present invention arranges N strips on the front (Top) of the printed circuit board (Printed Circuit Board, PCB) (N can be an odd number or an even number ) The transmission line with the same characteristic impedance as the input i...

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Abstract

The embodiment of the invention provides a UHF RFID reader antenna and a switching method. According to the antenna, N transmission lines of which the characteristic impedance is the same with the antenna input impedance are uniformly distributed on the front surface of the printed circuit board, M identical antenna oscillators are arranged on the front surface of the printed circuit board, N-M antenna oscillators are arranged on the back surface, a radio frequency switch is arranged, the M antenna oscillators and the M transmission lines arranged on the front surface form M feeding networks,the N-M antenna oscillators and the N-M transmission lines arranged on the back surface form N-M feeding networks, and the radio frequency switch controls and switches the antenna to enter one group of the N feeding network modes. The reading coverage area of the near-field region is increased without increasing the cost or the system complexity while maintaining the characteristic of long UHF RFID reading distance.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of antennas, in particular to a UHF RFID (ultra-high frequency radio frequency identification) reader antenna and a switching method. Background technique [0002] Radio Frequency Identification (RFID) is an automatic identification technology that automatically identifies target objects through radio frequency signals, and quickly performs item tracking and data exchange. RFID technology does not require manual intervention, can work in various harsh environments, can identify multiple tags at the same time, and is fast and convenient to operate. It is widely used in warehousing logistics, book management, industrial production, transportation, clothing and other fields. [0003] figure 1 It is a schematic structural diagram of the RFID system in the prior art, such as figure 1 As shown, the RFID system is mainly composed of three parts: a reader (Reader), a tag (Tag) and a data ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01Q21/29H01Q21/00H01Q3/24H01Q1/22
CPCH01Q1/2216H01Q3/247H01Q21/0075H01Q21/293
Inventor胡岳挺权威
OwnerBEIJING XINWANG RUIJIE NETWORK TECH CO LTD