EP2047565A1 - Slot antenna and method for rfid - Google Patents
Slot antenna and method for rfidInfo
- Publication number
- EP2047565A1 EP2047565A1 EP07786308A EP07786308A EP2047565A1 EP 2047565 A1 EP2047565 A1 EP 2047565A1 EP 07786308 A EP07786308 A EP 07786308A EP 07786308 A EP07786308 A EP 07786308A EP 2047565 A1 EP2047565 A1 EP 2047565A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- slot
- slots
- contour plate
- printed circuit
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005670 electromagnetic radiation Effects 0.000 claims abstract description 4
- 230000005855 radiation Effects 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 description 9
- 230000008901 benefit Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000009482 thermal adhesion granulation Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
-
- 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
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
- H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
Definitions
- the present invention relates in a first aspect to a slot antenna, in particular a transmitting antenna for RFID, according to the preamble of claim 1.
- the invention relates to a method for RFID.
- a generic slot antenna has at least one antenna contour plate with a plurality of antenna slots and at least one drive circuit for exciting the antenna contour plate for emitting and / or receiving electromagnetic radiation.
- RFID Remote radio-frequency identification
- RFID technologies are used, for example, in the military sector, in identity documents, libraries and, in particular, in the field of industrial manufacturing technology and automation.
- a method for RFID is to be specified with which increased functionality is achieved
- the slot antenna of the abovementioned type is further developed in that a printed circuit board with a drive circuit is inserted in at least one antenna slot, in particular from a rear side of the antenna contour plate
- a slot antenna according to the invention is used and by varying the phase position of the drive circuits, a radiation direction of the radiation is selectively changed
- a feed network with suitable drivers and matching circuits may be part of the drive circuit.
- the drive circuit may also include a receiver circuit or parts thereof
- the emission direction of the transmitter or the reader by varying the phase differences between the individual drive circuits to change targeted
- the antenna according to the invention there are a plurality of antenna shafts arranged in pairs in each case. It is particularly preferred if two pairs of slits lying transversely to each other, in particular mutually perpendicular, are present, since then the polarization of the radiation is achieved by suitable control
- the slots can be varied in a specific way. With a suitable phase angle of the respective control of the sliding - A -
- Such an antenna can also radiate circularly polarized radiation, which considerably increases the functionality of the antenna according to the invention and of the method according to the invention
- the antenna contour plate can have a rectangular arrangement of four antenna slots or a cross arrangement of likewise four antenna slots
- a cross arrangement of likewise four antenna slots is arranged within a rectangular arrangement of four antenna slots.
- the antenna slots can be regarded as nested in one another.
- the orientation of the crosswise arranged antenna slots can be chosen appropriately such that the antenna slots essentially lie on the diagonals of the antenna slots Rectangular arrangement lie This slot arrangement allows a particularly compact design
- the drive circuits each have electronic phase shifters for defined setting of a phase position of a drive signal
- the said particularly preferred antenna array with a rectangular arrangement and then lying cross arrangement of antenna slots accordingly consists of a plurality of slot radiators, which are each controlled via an electronically adjustable phase shifter
- the feeding or driving the individual antenna slots via a perpendicular or transverse thereto Circuit board contains the feed zone of the slot radiator, a matching network, the phase shifter, filter, a polarization switchover and a suitable control interface.
- This exemplary embodiment is characterized by particularly high functionality, as the antenna slots tilted towards one another achieve redundancy of the system means that even with loss of function of individual radiator elements no total failure occurs and such functional In any case, losses can be partially offset by appropriate compensation measures.
- the necessary drive power can be radiated from the drive circuits radiantly into the antenna contour plate.
- the printed circuit boards in a surrounding region of the respective antenna slot are preferably galvanically coupled to the antenna contour plate, in the simplest case thus conductively connected.
- the influence of the dielectric properties of the printed circuit board material on the antenna radiation is particularly great when the antenna slots are largely filled by the printed circuit board.
- the printed circuit board may have a tongue, which is received in an exact fit in the respective antenna slot.
- the structure according to the invention in which the printed circuit boards are inserted into the antenna slots, is therefore particularly economical because the substrate is efficiently concentrated essentially in the slot area.
- the influence of the dielectric properties of the printed circuit board material can be increased if at least one printed circuit board is slightly extended over a transmitting side of the Tennenkonturplatte survives.
- the effect of the inserted printed circuit boards can be further increased if protruding parts of the printed circuit boards are provided with a metallic structuring.
- a metallic structuring which is formed from conductor track sections running transversely to the antenna contour plate on the protruding parts of the printed circuit boards.
- the printed circuit boards expediently have a contact with the slot radiator in the region of the antenna slot.
- the location at which the feed or drive power is coupled into the antenna contour plate is particularly well defined.
- the contacting between the antenna contour plate and the printed circuit board can take place by means of a conductor track area becoming increasingly narrower in the direction of the antenna contour plate on the printed circuit board. The location of the actual contact area is then defined very precisely.
- the feeding of the slot can therefore be precise and in particular reproducible. This represents a considerable advantage with regard to the requirements for mass production. In this case, one is particularly completely free in the choice of feed points and thus receives an additional degree of freedom that can be used and varied targeted.
- the printed circuit boards are plugged into a stabilization plate on an opposite side of the antenna contour plate.
- This stabilization plate may in turn be a printed circuit board and carry other electronic or electrical components.
- FIG. 1 shows an embodiment of a slot antenna according to the invention
- FIG. 2 shows a view of the antenna contour plate of the antenna from FIG. 1,
- FIG. 3 shows a partial view of the antenna from FIG. 1, and FIG.
- FIGS. 1 to 3 Components corresponding to one another are each provided there with the same reference symbols
- the inventive antenna 10 has as essential components an antenna contour plate 20, a plurality of guide plates 50 arranged thereon with drive circuits 40 and a stabilizing plate 60, which may also carry electronic components
- the antenna contour plate 20 shown in FIG. 2 has two mutually orthogonal antenna systems.
- the first antenna system consists of a rectangular arrangement of four antenna slots 31 and the second slot system consists of four antenna slots 32 arranged in a cruciform manner.
- the antenna slots 32 are arranged inside the antenna slots 31 Rectangles essentially on its diagonals
- the slot systems are therefore interlocked and thus reduce the space requirement
- the problem of driving or feeding the antenna slots is inventively solved by the inserted into the antenna slots 31, 32 printed circuit boards 50th
- a printed circuit board 50 inserted into the antenna contour plate 20 from a rear side 22 may also protrude slightly on a transmitting side 24 of the antenna contour plate 20.
- the effect of the dielectric properties of the printed circuit board material is thereby reinforced
- a projecting part 54 of the printed circuit board 50 may have a metallic structuring 52 which effects a field concentration in the antenna slot 30 and thus allows miniaturization.
- the metallic structuring 52 is made transverse to the antenna contour plate 20 extending conductor track sections.
- all the antenna slots 31, 32 have identical dimensions, so that in each case uniform feed networks or more generally, printed circuit boards 50 with drive circuits 40 can be used
- a stabilizing plate 60 is attached, which may also be a circuit board with other electrical and / or electronic components
- these drive circuits 40 are used for feeding and for connecting the antennas via galvanic coupling, in the simplest case thus via a simple conductive connection. In comparison to radiation-coupled Schhtzantennen this less space is needed
- the drive circuits 40 each have electronic phase shifters, since then the beam lobe and / or the directional characteristic of the antenna can be selectively changed by the inventive method
- FIG. 4 shows an RFID reader 80 which has a slot antenna according to the invention of the type shown in FIG. 3.
- individual RFID tags are at different locations Locations designated.
- TAG 13 is addressed, whereas in the deflected beam directions 12, 16 the TAGs 14 and 15 are addressed.
- the change in the directional characteristic of the antenna according to the invention is carried out by targeted adjustment of the phase shifter in the drive circuits 40 of the respective antenna slots 31, 32nd
- a single tag can be tracked using the antenna according to the invention.
- individual TAGs can be specifically addressed and read out. A location with multiple readers at the same time is possible. Due to the well-defined directional characteristic of the antenna, certain solid angle ranges can furthermore be deliberately suppressed. This serves the interference suppression described above.
- the present invention thus provides a miniaturizable slot antenna system, in particular for use in RFID readers.
- RFID readers work particularly preferably in the microwave range, for example at 2.5 GHz.
- An essential core idea of the method according to the invention is to selectively pivot an antenna directivity.
- a high-performance and compact antenna system is provided by which, moreover, costs can be saved and which is particularly favorable with regard to the construction and connection technology.
- the compactness of the antenna is understood in particular also to its reduced dimensions. Compared to the systems on the market, which are significantly larger than the slot antennas described here, a considerable advantage can be achieved thereby.
- the unavoidable in radio propagation zeros, due to stagnant waves, by means of frequency change or "frequency-hopping" and / or by the pivoting of the beam can be eliminated to regulate the range may suitably control the radiated power transmission, as well as a variation of sensitivity with Help from low-noise preamplifiers are made
- phased array antennas With the erfmdungsgedorfen slot antenna therefore so-called “phased array antennas" can be realized in an advantageous manner With such antennas, an extremely rapid pivoting of the beam and also a very flexible adaptation of the antenna characteristic can be realized
- Applications of the invention may result in addition to reading systems, data carriers, general radio links, radar sensors and positioning systems in the field of access detection in buildings
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2007/006582 WO2009012796A1 (en) | 2007-07-24 | 2007-07-24 | Slot antenna and method for rfid |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2047565A1 true EP2047565A1 (en) | 2009-04-15 |
EP2047565B1 EP2047565B1 (en) | 2010-05-19 |
Family
ID=39269293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07786308A Not-in-force EP2047565B1 (en) | 2007-07-24 | 2007-07-24 | Slot antenna and method for rfid |
Country Status (8)
Country | Link |
---|---|
US (2) | US7999736B2 (en) |
EP (1) | EP2047565B1 (en) |
JP (1) | JP5205455B2 (en) |
CN (1) | CN101755366B (en) |
AT (1) | ATE468628T1 (en) |
DE (1) | DE502007003877D1 (en) |
HK (1) | HK1130953A1 (en) |
WO (1) | WO2009012796A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8723727B2 (en) | 2007-07-24 | 2014-05-13 | Pepperl + Fuchs Gmbh | Slot antenna and RFID method |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
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US20110047263A1 (en) * | 2009-08-24 | 2011-02-24 | Carlos Martins | Method and System for Automatic Location Tracking of Information Technology Components in a Data Center |
EP2531736B1 (en) | 2010-02-03 | 2014-03-05 | Fidlock GmbH | Fastening arrangement |
CN102740724B (en) | 2010-02-04 | 2015-04-01 | 费得洛克有限公司 | Closure device |
CN102339374A (en) * | 2010-07-19 | 2012-02-01 | 晁顶 | Electronic scanning card reader |
EP2640604B1 (en) | 2010-11-19 | 2015-03-25 | Fidlock GmbH | Closure device with electromagnetic coupling |
DE102010044194A1 (en) | 2010-11-19 | 2012-05-24 | Fidlock Gmbh | Closure device for supporting e.g. mobile telephone, on dashboard in vehicle, has electrical coils running in parallel to planes on housing sections of closure parts, where planes transversely run along closing direction |
DE102010044198B4 (en) | 2010-11-19 | 2013-05-16 | Fidlock Gmbh | Device for inductive coupling of two components |
DE102011114736A1 (en) | 2011-03-18 | 2012-09-20 | Hörmann KG Antriebstechnik | Loading dock for docking transport vehicle to building, has metallic plate provided with radio frequency identification reception and/or transmission unit provided at signal pass band that transmits radio frequency identification signals |
WO2012126861A1 (en) | 2011-03-18 | 2012-09-27 | Hörmann KG Antriebstechnik | Rfid apparatus and loading bridge provided therewith |
CN102280686A (en) * | 2011-04-20 | 2011-12-14 | 佛山市粤海信通讯有限公司 | RFID (radio frequency identification) slot antenna |
JP2015518308A (en) | 2012-03-20 | 2015-06-25 | トムソン ライセンシングThomson Licensing | ANTENNA DEVICE, SET-TOP BOX, AND COMMUNICATION METHOD |
DE102012102417A1 (en) | 2012-03-21 | 2013-09-26 | Balluff Gmbh | identification system |
DE102014213383A1 (en) | 2014-07-09 | 2016-01-14 | Fidlock Gmbh | Manually operated closure device with delay device |
JP6752097B2 (en) * | 2016-09-28 | 2020-09-09 | Kddi株式会社 | Antenna device |
US10476135B2 (en) | 2017-06-23 | 2019-11-12 | Arlo Technologies, Inc. | Portable electronic device with embedded antenna |
JP7470526B2 (en) * | 2020-02-19 | 2024-04-18 | 大王製紙株式会社 | RFID tag and antenna |
RU2751090C1 (en) * | 2020-03-18 | 2021-07-08 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Поволжский государственный университет телекоммуникаций и информатики" | Method for retaining the directivity of the uhf radio frequency identification tag during operation under a complex interference pattern |
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EP2047565B1 (en) | 2007-07-24 | 2010-05-19 | Pepperl + Fuchs Gmbh | Slot antenna and method for rfid |
-
2007
- 2007-07-24 EP EP07786308A patent/EP2047565B1/en not_active Not-in-force
- 2007-07-24 WO PCT/EP2007/006582 patent/WO2009012796A1/en active Application Filing
- 2007-07-24 CN CN200780053810.1A patent/CN101755366B/en not_active Expired - Fee Related
- 2007-07-24 JP JP2010517274A patent/JP5205455B2/en not_active Expired - Fee Related
- 2007-07-24 US US12/446,814 patent/US7999736B2/en not_active Expired - Fee Related
- 2007-07-24 AT AT07786308T patent/ATE468628T1/en active
- 2007-07-24 DE DE502007003877T patent/DE502007003877D1/en active Active
-
2009
- 2009-09-24 HK HK09108758.6A patent/HK1130953A1/en not_active IP Right Cessation
-
2011
- 2011-08-04 US US13/197,914 patent/US8723727B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2009012796A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8723727B2 (en) | 2007-07-24 | 2014-05-13 | Pepperl + Fuchs Gmbh | Slot antenna and RFID method |
Also Published As
Publication number | Publication date |
---|---|
EP2047565B1 (en) | 2010-05-19 |
ATE468628T1 (en) | 2010-06-15 |
CN101755366A (en) | 2010-06-23 |
JP2010534435A (en) | 2010-11-04 |
WO2009012796A1 (en) | 2009-01-29 |
US7999736B2 (en) | 2011-08-16 |
JP5205455B2 (en) | 2013-06-05 |
DE502007003877D1 (en) | 2010-07-01 |
US20100117902A1 (en) | 2010-05-13 |
CN101755366B (en) | 2015-04-01 |
HK1130953A1 (en) | 2010-01-08 |
US20110316746A1 (en) | 2011-12-29 |
US8723727B2 (en) | 2014-05-13 |
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