EP3355406A1 - Antenna apparatus for an rfid reader - Google Patents
Antenna apparatus for an rfid reader Download PDFInfo
- Publication number
- EP3355406A1 EP3355406A1 EP17153719.4A EP17153719A EP3355406A1 EP 3355406 A1 EP3355406 A1 EP 3355406A1 EP 17153719 A EP17153719 A EP 17153719A EP 3355406 A1 EP3355406 A1 EP 3355406A1
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- European Patent Office
- Prior art keywords
- antennas
- antenna device
- antenna
- stand
- carrier
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- 238000011156 evaluation Methods 0.000 claims description 5
- 239000000969 carrier Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000003203 everyday effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/084—Pivotable antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
- H01Q1/1228—Supports; Mounting means for fastening a rigid aerial element on a boom
-
- 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
Landscapes
- Support Of Aerials (AREA)
Abstract
Die Erfindung betrifft eine Antennenvorrichtung (1) für einen RFID-Reader (2), welche einen ortsfest verankerbaren Ständer (8) umfasst, der zumindest zwei Antennen (3 - 6) trägt, die jeweils in eine unterschiedliche Richtung weisen, wobei die Antennen (3 - 6), jeweils zwischen einer Ruhestellung und zumindest einer Auslenkstellung verschwenkbar am Ständer (8) gelagert und jeweils in ihre Ruhestellung federnd vorgespannt sind. Die Erfindung betrifft ferner eine Antennenanlage (20) mit zwei solchen Antennenvorrichtungen (1). The invention relates to an antenna device (1) for an RFID reader (2), which comprises a stationarily anchored stand (8) which carries at least two antennas (3 - 6) each pointing in a different direction, the antennas ( 3 - 6), in each case between a rest position and at least one deflection position pivotally mounted on the stand (8) and are resiliently biased in each case in their rest position. The invention further relates to an antenna system (20) with two such antenna devices (1).
Description
Die vorliegende Erfindung betrifft eine Antennenvorrichtung für einen RFID-Reader, welche einen ortsfest verankerbaren Ständer umfasst, der zumindest zwei Antennen trägt, die jeweils in eine unterschiedliche Richtung weisen. Die Erfindung betrifft ferner eine Antennenanlage mit mehreren solchen Vorrichtungen.The present invention relates to an antenna device for an RFID reader, which comprises a fixedly anchored stand which carries at least two antennas, each facing a different direction. The invention further relates to an antenna system with a plurality of such devices.
Die Kennzeichnung von Produkten, Ladegut und Ladegutträgern mittels RFID-Tags (Radio Frequency Identification Tags) ist in der Fertigung, Warenwirtschaft, Lager- und Transportlogistik seit vielen Jahren gängige Praxis. Zum Auslesen der RFID-Tags an Warenumschlagplätzen, Verladedocks, Lagerein- und -ausgängen sowie entlang von industriellen Fertigungsstraßen werden in der Regel RFID-Reader mit Richtantennen verwendet, um die RFID-Tags örtlich gezielt ansprechen zu können. Bei Verwendung zweier in unterschiedliche Richtungen weisender Antennen pro RFID-Reader kann dabei auch die Passagerichtung beim Passieren des RFID-Readers ermittelt werden.The labeling of products, load and load carriers by means of RFID tags (Radio Frequency Identification Tags) has been common practice in manufacturing, inventory management, storage and transport logistics for many years. RFID readers with directional antennas are generally used to read the RFID tags at goods transfer points, loading docks, warehouse inlets and outlets as well as along industrial production lines in order to address the RFID tags locally. When using two antennas pointing in different directions per RFID reader, the pass direction when passing the RFID reader can also be determined.
Im rauen Alltagsbetrieb sind derartige Antennenvorrichtungen hohen mechanischen Belastungen ausgesetzt. Gabelstapler, Ladegut-Trolleys, Paletten auf Rollen od.dgl., die versehentlich gegen die Antennenvorrichtung stoßen, können diese verbiegen oder verstellen, was die Kalibrierung des RFID-Readers und seine Lokalisierungsfunktionen stört und ungünstigstenfalls zu einem Totalausfall der Anlage führt. Zum Schutz der Antennenvorrichtung werden daher derzeit Rammschutzbügel, Schutzgitter, Leitplanken usw. vor den Antennen angebracht. Dies erhöht jedoch den Platzbedarf bzw. verringert die lichte Durchfahrtsbreite, beispielsweise für Gabelstapler. Personen, die den Spalt zwischen Rammschutz und Antennen nützen, gefährden weiterhin die Antennen und ihre korrekte Justierung.In harsh everyday operation such antenna devices are exposed to high mechanical loads. Forklifts, cargo trolleys, pallets on wheels or the like that accidentally hit the antenna device may bend or misalign it, interfering with the calibration of the RFID reader and its localization functions and, in the worst case, resulting in total system failure. To protect the antenna device are therefore currently rammschutzbügel, protective grid, Guard rails, etc. mounted in front of the antennas. However, this increases the space requirement or reduces the clear passage width, for example for forklifts. Persons who use the gap between ramming protection and antennas continue to endanger the antennas and their correct adjustment.
Die Erfindung setzt sich zum Ziel, die Nachteile des bekannten Standes der Technik zu überwinden und eine verbesserte Antennenvorrichtung für RFID-Reader zu schaffen, welche auch hohen Alltagsbeanspruchungen standhält und dabei platzsparend und kostengünstig aufgebaut ist.The invention sets itself the goal of overcoming the disadvantages of the known prior art and to provide an improved antenna device for RFID readers, which also withstands high everyday stresses while being space-saving and inexpensive.
Dieses Ziel wird mit einer Antennenvorrichtung der einleitend genannten Art erreicht, welche sich gemäß der Erfindung dadurch auszeichnet, dass die Antennen jeweils zwischen einer Ruhestellung und zumindest einer Auslenkstellung verschwenkbar am Ständer gelagert und jeweils in ihre Ruhestellung federnd vorgespannt sind.This object is achieved with an antenna device of the aforementioned type, which is characterized according to the invention in that the antennas are each mounted pivotably between a rest position and at least one deflection position on the stand and each spring-biased to its rest position.
Auf diese Weise können die Antennen bei Kollision mit einem Fahrzeug, Ladegutträger, Personen usw. federnd ausweichen, sodass sie nicht bleibend dejustiert oder beschädigt werden. Die Antennen kehren stets selbsttätig wieder in ihre justierte Ruhestellung zurück. Die erfindungsgemäße Antennenvorrichtung erübrigt damit das Montieren eines zusätzlichen Rammschutzes, was Kosten und Platz spart und die lichte Durchfahrtsbreite an Verladetoren, Ein- und Ausgängen, Lieferwegen usw. maximiert.In this way, the antennas can dodge when colliding with a vehicle, load carrier, people, etc. so that they are not permanently misaligned or damaged. The antennas always return automatically to their adjusted rest position. The antenna device according to the invention thus eliminates the need to mount an additional crash protection, which saves costs and space and maximizes the clear passage width at loading gates, entrances and exits, delivery routes, etc.
Die Antennen können jeweils einzeln verschwenkbar am Ständer gelagert sein. Jede Antenne kann dabei von der Ruhestellung nur in eine Richtung, d.h. eine Auslenkstellung, verschwenkbar sein, beispielsweise wenn das Verladetor, an dem die Antennenvorrichtung montiert ist, stets nur in einer Richtung passiert wird. Bevorzugt sind die Antennen jedoch von ihrer Ruhestellung aus in zwei entgegengesetzte Richtungen, d.h. zwei Auslenkstellungen, auslenkbar, sodass sie gleichsam um ihre Ruhestellung federnd pendeln können.The antennas can each be mounted individually pivotable on the stand. Each antenna can be pivoted from the rest position only in one direction, ie a deflection position be, for example, when the loading gate on which the antenna device is mounted, is always passed in one direction. Preferably, however, the antennas are deflected from their rest position in two opposite directions, that is, two deflection positions, so that they can, as it were, oscillate resiliently about their rest position.
Eine besonders vorteilhafte Ausführungsform der Erfindung zeichnet sich dabei dadurch aus, dass die Antennen an einem gemeinsamen Träger montiert sind, welcher am Ständer zwischen zwei Auslenkstellungen, zwischen denen die Ruhestellung liegt, verschwenkbar gelagert ist. Durch ihre gemeinsame Montage an einem Träger sind die Antennen in ihrer Relativlage zueinander festgelegt, welche sie auch bei Auslenkung des Trägers beibehalten. Überdies ist nur eine Schwenklagerung für alle am Träger montierten Antennen erforderlich.A particularly advantageous embodiment of the invention is characterized in that the antennas are mounted on a common carrier which is pivotally mounted on the stand between two Auslenkstellungen, between which the rest position. By their common mounting on a support, the antennas are fixed in their relative position to each other, which they maintain even when the carrier is deflected. Moreover, only one pivotal mounting is required for all antennas mounted on the carrier.
Besonders günstig ist es, wenn die Ruhestellung mittig zwischen den beiden Auslenkstellungen liegt, sodass die Antennen mitsamt dem Träger symmetrisch um ihre Ruhestellung auslenken bzw. pendeln können.It is particularly favorable if the rest position is located centrally between the two deflection positions, so that the antennas together with the carrier can deflect or oscillate symmetrically about their rest position.
Bevorzugt ist der Träger über ein Pendeltürscharnier am Ständer schwenkbar gelagert. Pendeltürscharniere sind als industriell vorgefertigte Baugruppe, gleich mit Federvorspannung in die Mittel- bzw. Ruhestellung, erhältlich, was Fertigung und Montage der Antennenvorrichtung erleichtert.Preferably, the carrier is pivotally mounted on the stand via a hinged door hinge. Swing door hinges are available as an industrially prefabricated assembly, equal spring preload in the middle or rest position, which facilitates manufacture and assembly of the antenna device.
In einer ersten Variante der Erfindung ist der Träger ein auskragender Arm, der an einem Ende schwenkbar am Ständer gelagert ist und am anderen Ende die Antennen trägt. Mit dem auskragenden Arm kann einer großer Schwenkwinkel realisiert werden, ohne dass die Antennen gegen den Ständer stoßen.In a first variant of the invention, the carrier is a projecting arm, which is pivotally mounted on one end of the stand and at the other end carries the antennas. With the projecting arm, a large swivel angle can be realized without the antennas bump against the stand.
In einer alternativen Variante der Erfindung ist der Träger ein Querträger, welcher in seiner Mitte am Ständer schwenkbar gelagert ist und an seinen beiden Enden jeweils eine Antenne trägt. Ein solcher Querträger ragt wenig vor, was die lichte Durchtrittsbreite eines Ladeportals, Lieferweges usw., an dem die Antennenvorrichtung montiert ist, vergrößert.In an alternative variant of the invention, the carrier is a cross member, which is pivotally mounted in its center on the stand and carries at its two ends in each case an antenna. Such a cross member protrudes little, what the clear passage width of a loading portal, delivery path, etc., on which the antenna device is mounted increases.
Gemäß einem weiteren vorteilhaften Merkmal der Erfindung sind die Antennen Patch- oder Panelantennen, welche unter einem Winkel von 60° bis 120°, bevorzugt etwa 90°, zueinander angeordnet sind. Dadurch können gut unterscheidbare Richtwirkungen im Ein- und Austrittsbereich beim Passieren der Antennenvorrichtung erzielt werden. In der Ausführungsform mit Kragarm bilden die Antennen unter diesen Winkeln eine Art "Pfeil" am Ende des Arms, und in der Ausführungsform mit Querträgern bilden die Antennen unter diesen Winkeln an den Enden des Querträgers eine Art von Einlauf- bzw. Auslauf-Leitplanken, welche das Passieren der Antennenvorrichtung und das Ausweichen der Antennen erleichtern.According to a further advantageous feature of the invention, the antennas are patch or panel antennas, which are arranged at an angle of 60 ° to 120 °, preferably about 90 ° to each other. As a result, easily distinguishable directivities can be achieved in the entry and exit areas when passing through the antenna device. In the cantilever embodiment, the antennas form a kind of "arrow" at the end of the arm at these angles, and in the transverse beam embodiment, the antennas form, at these angles at the ends of the cross member, a type of run-in guardrail facilitate passing the antenna device and avoiding the antennas.
In jeder der genannten Ausführungsformen kann die Antennenvorrichtung ferner eine an die Antennen angeschlossenen Auswerteschaltung aufweisen, welche dafür ausgebildet ist, aus in den Antennen empfangenen Signalen, die von einem die Antennenvorrichtung passierenden RFID-Tag herrühren, die Passagerichtung dieses RFID-Tags zu ermitteln. Die Auswerteschaltung vergleicht dazu beispielsweise den zeitlichen Verlauf der Signale, um festzustellen, welche Antenne zuerst anspricht.In each of the aforementioned embodiments, the antenna device may further comprise an evaluation circuit connected to the antennas, which is designed to determine the pass direction of this RFID tag from signals received in the antennas which originate from an RFID tag passing through the antenna device. The evaluation circuit compares for example, the timing of the signals to determine which antenna responds first.
Gemäß einem weiteren bevorzugten Merkmal der Erfindung trägt der Ständer zumindest zwei Paare von Antennen, welche Paare mit gegenseitigem Abstand übereinander angeordnet sind. Dadurch kann die Antennenvorrichtung mit auf unterschiedlichen Höhen passierenden RFID-Tags kommunizieren.According to a further preferred feature of the invention, the stator carries at least two pairs of antennas, which pairs are arranged one above the other at a mutual distance. This allows the antenna device to communicate with RFID tags passing at different heights.
Besonders günstig ist es dabei, wenn jedes Paar einen eigenen Träger hat, welcher am Ständer verschwenkbar gelagert ist, sodass die Antennen jeweils paarweise am Ständer federnd pendelnd gelagert sind.It is particularly advantageous if each pair has its own carrier, which is pivotally mounted on the stand, so that the antennas are each mounted in pairs resiliently pendulum on the stand.
In einem weiteren Aspekt schafft die Erfindung auch eine Antennenanlage mit zwei einander in einem Abstand gegenüberliegenden Antennenvorrichtungen der hier geschilderten Art, welche zwischeneinander ein Passageportal bilden. Bevorzugt sind die beiden Antennenvorrichtungen dabei über eine Kopfüberverrohrung miteinander verbunden, sodass sie ein Portal bilden, welches am Boden ungehinderte Durchfahrt bietet. Die beiden Antennenvorrichtungen können so von einen gemeinsamen RFID-Reader benutzt werden, welcher z.B. an einer Antennenvorrichtung montiert und über die Kopfüberverrohrung mit der gegenüberliegenden Antennenvorrichtung verbunden ist.In another aspect, the invention also provides an antenna system having two mutually spaced apart antenna devices of the type described herein which form a passageway therebetween. Preferably, the two antenna devices are connected to each other via a Kopfüberverrohrung so that they form a portal, which offers unimpeded passage at the bottom. The two antenna devices can thus be used by a common RFID reader, which e.g. is mounted on an antenna device and connected via the Kopfüberverrohrung with the opposite antenna device.
Die Erfindung wird nachstehend anhand von in den beigeschlossenen Zeichnungen dargestellten Ausführungsbeispielen näher erläutert. In den Zeichnungen zeigen:
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Fig. 1 eine erste Ausführungsform der Antennenvorrichtung der Erfindung in einer Perspektivansicht; -
Fig. 2 eine zweite Ausführungsform der Antennenvorrichtung der Erfindung in der Draufsicht; -
Fig. 3 eine dritte Ausführungsform der Antennenvorrichtung der Erfindung in der Draufsicht; und -
Fig. 4 eine Antennenanlage gemäß der Erfindung in einer Perspektivansicht.
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Fig. 1 a first embodiment of the antenna device of the invention in a perspective view; -
Fig. 2 a second embodiment of the antenna device of the invention in plan view; -
Fig. 3 a third embodiment of the antenna device of the invention in plan view; and -
Fig. 4 an antenna system according to the invention in a perspective view.
Die Antennenvorrichtung 1 hat eine, zwei oder mehr (hier: vier) Antennen 3, 4, 5, 6, welche über (nicht dargestellte) Antennenleitungen an den RFID-Reader 2 angeschlossen sind.The
Der RFID-Reader 2 kommuniziert über die Antennenvorrichtung 1, genauer deren Antennen 3 - 6, mit RFID-Tags 7, wie sie beispielsweise an Produkten, Ladegut, Ladegutträgern, Paletten, Containern usw. angebracht und zur Kennzeichnung derselben oder deren Inhalt dienen. Der RFID-Reader 2 und seine Antennenvorrichtung 1 können nach jedem bekannten Funkstandard arbeiten, sei es RFID im eigentlichen (standardgemäßen) Sinne, NFC (Near Field Communication), DSRC (Dedicated Short Range Communication), WiFi, BlueTooth od.dgl. Der Begriff "RFID" wird hier demgemäß für jeden beliebigen Funkkommunikationsstandard verwendet. Die RFID-Tags 7 können sowohl aktiver als auch passiver Art sein, beispielsweise aktive oder passive Transponderchips.The
Die Antennenvorrichtung 1 umfasst einen ortsfest verankerbaren Ständer 8, beispielsweise eine Säule mit einer Fußplatte 9 zur Verankerung am Boden, optional mittels Schrauben 10. An dem Ständer 8 sind die Antennen 3 - 6 schwenkbar gelagert, und zwar (hier) jeweils paarweise, wie später noch ausführlicher erörtert. Der Ständer 8 kann auch jede andere Form als die gezeigte Säulenform haben. Tatsächlich ist als Ständer 8 jede beliebige Grundkonstruktion geeignet, welche die Antennen 3 - 6 tragen kann, beispielsweise ein Schaltkasten, eine Wand, ein Gebäudeteil usw. Alle diese Varianten fallen unter den hier verwendeten Begriff "Ständer".The
Die Antennen 3 - 6 sind jeweils Flachantennen, beispielsweise Patch-, Panel- oder Array-Antennen mit Richtwirkung normal zu ihrer Flächenerstreckung, wie sie beispielsweise in der UHF- oder Mikrowellentechnik Verwendung finden. Die beiden Antennen eines Paares 3, 4 bzw. 5, 6 weisen jeweils in unterschiedliche Richtungen und sind zu diesem Zweck - insbesondere wenn sie Flachantennen sind - unter einem Winkel α (
Die Antennen 3 - 6 können jeweils einzeln über gesonderte Schwenklager (nicht gezeigt) am Ständer 8 schwenkbar gelagert sein. Alternativ und wie in
Die Schwenklager 13, 14 sind mit einer automatischen, federnden Rückstellung der Träger 11, 12 in die in
In
Die beiden Antennenvorrichtungen 1 der Anlage 20 können über eine Kopfüberverrohrung 22 miteinander verbunden sein, sodass beispielsweise ein einziger RFID-Reader 2 an einer der Antennenvorrichtungen 1 genügt, welcher über die Kopfüberverrohrung 22 elektrisch mit der gegenüberliegenden Antennenvorrichtung 1 verbunden werden kann.The two
Zurückkehrend auf
Es versteht sich, dass die Antennen 3 - 6 oder die Träger 11, 12, 16 in vereinfachten Ausführungsformen, insbesondere wenn die Antennenvorrichtung 1 bzw. Antennenanlage 20 stets nur in einer Richtung passiert wird, von ihrer Ruhestellung auch jeweils nur in eine einzige Auslenkstellung federnd auslenkbar sein können. An einem Träger 11, 12, 16 können auch nur eine oder mehr als zwei Antennen 3 - 6 montiert sein. Darüber hinaus können die Antennen 3 - 6 auch jeweils direkt, d.h. ohne Träger 11, 12, 16, am Ständer 8 schwenkbar gelagert sein.It is understood that the antennas 3 - 6 or the
Die Erfindung ist demgemäß nicht auf die dargestellten Ausführungsformen beschränkt, sondern umfasst alle Varianten, Modifikationen und deren Kombinationen, die in den Rahmen der angeschlossenen Ansprüche fallen.The invention is therefore not limited to the illustrated embodiments, but includes all variants, Modifications and their combinations that fall within the scope of the appended claims.
Claims (12)
Priority Applications (1)
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EP17153719.4A EP3355406B1 (en) | 2017-01-30 | 2017-01-30 | Antenna apparatus for an rfid reader |
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EP17153719.4A EP3355406B1 (en) | 2017-01-30 | 2017-01-30 | Antenna apparatus for an rfid reader |
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EP3355406A1 true EP3355406A1 (en) | 2018-08-01 |
EP3355406B1 EP3355406B1 (en) | 2019-05-22 |
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CN109462032A (en) * | 2018-10-10 | 2019-03-12 | 江苏三和欣创通信科技有限公司 | A kind of more star dual-band antennas based on multi-arm spiral |
CN110994122A (en) * | 2019-11-22 | 2020-04-10 | 李晶 | Miniaturized antenna applied to 5G mobile communication |
EP4033395A1 (en) * | 2021-01-21 | 2022-07-27 | Toshiba TEC Kabushiki Kaisha | Wireless tag reader and basket device |
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CN110994122A (en) * | 2019-11-22 | 2020-04-10 | 李晶 | Miniaturized antenna applied to 5G mobile communication |
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US11954543B2 (en) | 2021-01-21 | 2024-04-09 | Toshiba Tec Kabushiki Kaisha | Wireless tag reader and basket device |
Also Published As
Publication number | Publication date |
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EP3355406B1 (en) | 2019-05-22 |
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