WO2020103335A1 - Microruban d'identification par radiofréquence à fréquence ultra-haute et dispositif de lecture et d'écriture d'identification par radiofréquence à fréquence ultra-haute - Google Patents

Microruban d'identification par radiofréquence à fréquence ultra-haute et dispositif de lecture et d'écriture d'identification par radiofréquence à fréquence ultra-haute

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Publication number
WO2020103335A1
WO2020103335A1 PCT/CN2019/073282 CN2019073282W WO2020103335A1 WO 2020103335 A1 WO2020103335 A1 WO 2020103335A1 CN 2019073282 W CN2019073282 W CN 2019073282W WO 2020103335 A1 WO2020103335 A1 WO 2020103335A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio frequency
frequency identification
microstrip line
uhf radio
microstrip
Prior art date
Application number
PCT/CN2019/073282
Other languages
English (en)
Chinese (zh)
Inventor
颜力
Original Assignee
南京思追特电子科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 南京思追特电子科技有限公司 filed Critical 南京思追特电子科技有限公司
Publication of WO2020103335A1 publication Critical patent/WO2020103335A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10158—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Definitions

  • the invention relates to the field of signal transmission, in particular to a UHF radio frequency identification microstrip line and an UHF radio frequency identification reader.
  • UHF RFID technology With the improvement of chip performance and the reduction of chip prices, the development and application of UHF RFID technology has entered the fast lane since 2015. More and more actual projects use UHF radio frequency identification technology to identify items or people, thereby helping to complete the management work such as inventory, search, traceability, timing, and charging.
  • UHF RFID technology performance is not ideal, the label is either missed or misread, it is always difficult to obtain a satisfactory recognition rate.
  • the repeated reflection and refraction of the electromagnetic field in the surrounding environment, the influence of the liquid and metal on the matching performance of the tag antenna, and the fading law of the field in the far field of the electromagnetic field radiation have caused the randomness of the electromagnetic field strength and blind areas in the entire reading area Sex, uncertainty, and perturbability. This leads to problems of missed reading and misreading.
  • Most near-field antenna structures can be regarded as a combination of several radiating elements, which are still essentially standing wave antennas. As long as it is a standing wave antenna, there are inevitably strong and blind areas in the antenna field area.
  • the near-field antenna structure currently proposed in the market or in the literature is relatively complex, difficult to process, and the cost remains high, which affects the further promotion and application of the radio frequency identification system.
  • the present invention provides an ultra-high frequency radio frequency identification microstrip line, which is easy to process and controllable in cost, and has a simple feed point and a frequency loan of more than 100 trillion.
  • the present invention provides a UHF radio frequency identification microstrip line
  • the UHF radio frequency identification microstrip line includes a dielectric substrate, a conductor formed on a surface of the dielectric substrate, formed in the The metal ground on the other surface of the dielectric substrate, the conductor includes a meandering part, a pair of connecting parts located at both ends of the meandering part and integrally formed with the meandering part, one of the connecting parts is connected to a matching load, Another connection part connects the feed point.
  • the number of the UHF radio frequency identification microstrip lines is several, the several UHF radio frequency identification microstrip lines are connected in series by a cable, and are located at the connection parts at the first and last ends, one of which is connected To match the load, another connection part is connected to the feed point.
  • the number of the UHF radio frequency identification microstrip lines is several, the several UHF radio frequency identification microstrip lines are connected in series by a cable, and are located at the connection parts at the first and last ends, one of which is connected To match the load, another connection part is connected to the feed point.
  • connection part is connected to a radio frequency connector matching a load, a feed point or another UHF radio frequency identification microstrip line through a radio frequency connector.
  • the metal ground of the UHF radio frequency identification microstrip line extends around the conductor, and the metal ground extending around the conductor is located on the same surface as the conductor.
  • grounding portion surrounding the conductor has two slots, and the connecting portion passes through the slot and is connected to the radio frequency connector.
  • the strong magnetic field of the micro-strip line of the UHF radio frequency identification is evenly distributed.
  • the cable is a coaxial cable.
  • the UHF radio frequency identification microstrip line is at most 10 meters.
  • the present invention also provides a UHF RFID microstrip line connection for identifying, reading or writing near field RFID electronic tags located in the area above the UHF RFID microstrip line .
  • the ultra-high frequency radio frequency identification microstrip line in the present invention is easy to process, the cost is controllable, and the feed point is simple, and the frequency loan can reach more than one trillion.
  • the meander line structure of the UHF RFID microstrip line uses the spatial coupling of the current of the adjacent microstrip lines and the discontinuity at the bend to form a strong magnetic field near the UHF RFID microstrip line. Connect a matching load to the end of the UHF RFID microstrip line, so that the strong magnetic field of the UHF RFID microstrip line is evenly distributed.
  • the length of the UHF RFID microstrip line is adjustable, easy to use, users can choose the appropriate UHF RFID microstrip line with a meandering period according to their needs, or connect different numbers of UHF RFID in series as needed Microstrip line.
  • the length of the UHF RFID microstrip line can be adjusted from several meters to tens of meters.
  • the microstrip line of the UHF radio frequency identification in the present invention has quite excellent radio frequency reading performance, successfully restrains the electromagnetic near field directly above it, and completely solves the problems of missed reading and misreading of the UHF radio frequency identification.
  • this UHF radio frequency identification microstrip line has wide frequency band adaptability, wide temperature adaptability, wide processing tolerance, and wide dielectric constant adaptability.
  • the metal ground plane can also process printed circuits, directly integrating the RF front end and the UHF radio frequency identification microstrip line, which is an excellent structure with extensive practical value.
  • FIG. 1 is a schematic structural view of a metal plate placed above the microstrip line of the UHF radio frequency identification of the present invention.
  • FIG. 2 is a schematic diagram of the structure of a microstrip line for UHF radio frequency identification.
  • the UHF radio frequency identification microstrip line in the present invention is given.
  • the UHF radio frequency identification microstrip line is processed by PCB (Printed Circuit Board) technology, and the UHF radio frequency identification
  • the microstrip line includes a dielectric substrate 1, a conductor 2 formed on the upper surface of the dielectric substrate 1, a metallic ground 3 formed on the lower surface of the dielectric substrate, the metallic ground surrounding the conductor and extending to the dielectric On the other surface of the substrate 1, the metal ground extending around the conductor is on the same surface as the conductor.
  • the UHF radio frequency identification microstrip line may not have a metal ground surrounding the conductor, but only a metal ground located on the opposite surface of the dielectric substrate and the conductor 2.
  • the conductor 2 includes a meandering portion 21, a pair of connecting portions 22, 23 located at both ends of the meandering portion 21 and integrally formed with the meandering portion 21, one of the connecting portions 22 is connected to a matching load, and the other is connected Section 23 connects the feed points.
  • the number of meanders can be adjusted according to actual needs.
  • the length of the conductor 2 can be adjusted freely, the period of the meander line can be selected according to the need, or several UHF radio frequency identification microstrip lines can be connected through a coaxial cable, and the coaxial cables are respectively connected to two adjacent The connection part of a UHF radio frequency identification microstrip line.
  • the coaxial cable connects several UHF RFID microstrip lines in series, and then connects the connection end of one of the UHF RFID microstrip lines at both ends to the load and the other to the feed point.
  • connection parts 22 and 23 are connected to two radio frequency connectors 5, one of which is connected to the feed point, and the other is connected to the radio frequency connector of the ultra-high frequency radio frequency identification microstrip line connected thereto or a matched load.
  • the metal ground 3 surrounding the conductor 2 has two slots 31 through which the connecting portions 22 and 23 pass and are connected to the radio frequency connector 5.
  • the ultra-high frequency radio frequency identification microstrip line in the present invention is easy to process, the cost is controllable, and the feed point is simple, and the frequency loan can reach more than 100 trillion.
  • the meander line structure of the UHF RFID microstrip line uses the spatial coupling of the current of the adjacent microstrip lines and the discontinuity at the bend to form a strong magnetic field near the UHF RFID microstrip line. Connect the matching load to the end of the UHF RFID microstrip line, so that the strong magnetic field of the UHF RFID microstrip line is evenly distributed, that is, the same point may be a peak or a trough at different times. As shown in FIG. 1, the uppermost rectangular metal plate 4 has little effect on the performance of the UHF radio frequency identification microstrip line, and further reflects the near-field characteristics of the UHF radio frequency identification microstrip line.
  • the length of the UHF radio frequency identification microstrip line is adjustable, easy to use, users can choose the appropriate UHF radio frequency identification microstrip line with a meandering period, or connect different numbers of UHF in series Radio frequency identification microstrip line.
  • the length of the UHF radio frequency identification microstrip line can be adjusted from several meters to several tens of meters, and the meandering period of the meandering part 21 can be extended to many as long as the radio frequency loss of the propagation structure or the dielectric substrate is small enough.
  • UHF radio frequency identification microstrip lines can also be cascaded with each other, thereby forming a longer or irregular UHF radio frequency identification microstrip line.
  • the UHF radio frequency identification microstrip line is connected to the UHF radio frequency identification reader, and is used to identify, read or write the near field radio frequency identification electronic tag located in the area above the UHF radio frequency identification microstrip line.
  • the microstrip line of the UHF radio frequency identification in the present invention has quite excellent radio frequency reading performance, successfully restrains the electromagnetic near field directly above it, and completely solves the problems of missed reading and misreading of the UHF radio frequency identification.
  • this UHF radio frequency identification microstrip line has wide frequency band adaptability, wide temperature adaptability, wide processing tolerance, and wide dielectric constant adaptability.
  • the metal ground plane can also process printed circuits, directly integrating the RF front end and the UHF radio frequency identification microstrip line, which is an excellent structure with extensive practical value.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Waveguide Connection Structure (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

Micro-ruban d'identification par radiofréquence à fréquence ultra-haute comprenant un substrat de support (1) ; un conducteur (2) formé sur une surface du substrat de support (1) ; et une masse métallique (3) formée sur une autre surface du substrat de support (1). Le conducteur (2) comprend une partie sinueuse (21), et une paire de parties de connexion (22, 23) situées au niveau de deux extrémités de la partie sinueuse (21) et formées d'un seul tenant avec celle-ci, une partie de connexion (22) étant connectée à une charge adaptée, et l'autre partie de connexion (23) étant connectée à un point d'alimentation. Le micro-ruban d'identification par radiofréquence à fréquence ultra-haute présente une structure sinueuse employant un couplage spatial de courants dans des micro-rubans adjacents et la discontinuité de parties courbées, de manière à former un champ magnétique fort dans une position proche et au-dessus du micro-ruban d'identification par radiofréquence à fréquence ultra-haute. La longueur du micro-ruban d'identification par radiofréquence à fréquence ultra-haute est réglable et facile à utiliser. Un utilisateur peut sélectionner, en fonction des exigences réelles, un micro-ruban d'identification par radiofréquence à fréquence ultra-haute ayant une période sinueuse appropriée, ou connecter un nombre aléatoire de micro-rubans d'identification par radiofréquence à fréquence ultra-haute en série en fonction des exigences réelles.
PCT/CN2019/073282 2018-11-22 2019-01-26 Microruban d'identification par radiofréquence à fréquence ultra-haute et dispositif de lecture et d'écriture d'identification par radiofréquence à fréquence ultra-haute WO2020103335A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811394608.1 2018-11-22
CN201811394608.1A CN109462026A (zh) 2018-11-22 2018-11-22 超高频射频识别的微带线及超高频射频识别读写器

Publications (1)

Publication Number Publication Date
WO2020103335A1 true WO2020103335A1 (fr) 2020-05-28

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Country Status (2)

Country Link
CN (1) CN109462026A (fr)
WO (1) WO2020103335A1 (fr)

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CN112018512A (zh) * 2020-08-14 2020-12-01 中北大学 一种小型平面医用定向微波谐振天线

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CN109994816A (zh) * 2019-04-24 2019-07-09 南京思追特电子科技有限公司 微带分支线结构
WO2020215258A1 (fr) * 2019-04-24 2020-10-29 南京思追特电子科技有限公司 Structure de ligne de ramification de micro-bande
CN113033224A (zh) * 2019-12-25 2021-06-25 菜鸟智能物流控股有限公司 射频标签读写装置及射频标签读写方法

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