WO2010066799A2 - Circuit d'antenne rfid - Google Patents
Circuit d'antenne rfid Download PDFInfo
- Publication number
- WO2010066799A2 WO2010066799A2 PCT/EP2009/066749 EP2009066749W WO2010066799A2 WO 2010066799 A2 WO2010066799 A2 WO 2010066799A2 EP 2009066749 W EP2009066749 W EP 2009066749W WO 2010066799 A2 WO2010066799 A2 WO 2010066799A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- turn
- antenna
- terminal
- point
- circuit according
- Prior art date
Links
Classifications
-
- 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
- H01Q1/2225—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 active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
Definitions
- the invention relates to an RFID and NFC antenna circuit.
- RFID is the abbreviation of radio frequency identification (in English: “radio frequency identification”).
- NFC is the abbreviation for near-field communication (in English: “near fîeld communication”).
- RFID / NFC technology is used in many areas, for example in mobile phones, personal organizers called PDAs, computers, contactless card readers, cards themselves to be read without contact, but also passports, identification tags of articles or description of articles (in English: "tag”), USB keys and SIM cards and (U) SIM cards called “SIM card RFID or NFC", thumbnails for Dual or Dual Interface card (the sticker itself having an RFID / NFC antenna), watches.
- the antenna of a first RFID circuit radiates electromagnetically at a distance a radio frequency signal comprising data to be received by the antenna of a second RFID circuit (transponder), which can, if necessary, respond to the first circuit by data by load modulation.
- Each RFID circuit has its antenna operating at its own resonant frequency.
- the problem of the RFID antenna circuit relates to the efficiency of the magnetic antenna of the transponder and the reader, or, on the efficiency of the coupling by mutual inductance between the two magnetic antennas, on the transmission energy and information between the party electronics and its antenna, on the transmission of energy and information between the two antennas of the RFID system.
- the main objective is to gain in radio efficiency (power of the emitted or captured magnetic field, coupling, mutual inductance %) by the antenna without losing on the quality of the signal (data distortions, bandwidth of the antenna ...) issued or received.
- antennas small areas (30 ⁇ 30mm) or very low (5 ⁇ 5 mm) for applications such as cards or ⁇ Cartes, labels (in English: stickers), small players or optional drive or detachable, in mobile telephony, in USB keys, in SIM cards.
- antennas of reasonable sizes > 16 cm 2
- antennas with reduced surface area ⁇ 16cm 2
- very small antennas one sees appearing ever more important needs on the necessity of power on the magnetic field transmitted or captured, over the bandwidth of the radio channel in order to meet the ever increasing data flow requirements and standards in force such as TISO14443 (example for transport, identity %), ISO15693 (example for labels) and specifications for the RFID / NFC banking domain (EMVCO).
- US-A-7,212,124 discloses a mobile phone information device comprising an antenna coil formed on a substrate, a sheet of magnetic material, an integrated circuit and resonance capacitors connected to the antenna coil.
- the integrated circuit communicates with an external device in that the antenna coil uses a magnetic field.
- a vacuum serving as a battery receiving section is formed on a portion of the housing surface and is covered by a battery cover.
- the battery, the antenna coil and the sheet of magnetic material are housed in the depression.
- a vacuum evaporated metal film or coating of conductive material is applied to the housing, while no vacuum evaporated metal film or coating of conductive material is applied to the battery cover.
- the antenna coil is disposed between the battery cover and the battery while the sheet of magnetic material is disposed between the antenna coil and the battery in the vacuum.
- the antenna coil has an intermediate tap, the resonance capacitors are connected to both ends of the antenna coil, and the integrated circuit is connected in the middle between one end of the antenna coil and the intermediate tap. .
- This device has many disadvantages.
- the antenna must have a very high quality factor before integration. But a quality factor with such a high value is not suitable for RFID / NFC antenna circuits for readers or transponders (cards, labels, USB sticks). In a mobile phone, the reason for this very high value quality factor is that the electrical and mechanical constraints overwrite the original quality factor of the antenna.
- this quality coefficient of the antenna would be too high and would then generate a bandwidth at -3 dB of the antenna very reduced, so a very severe filtering of the modulated RF signal emitted or received by load modulation (subcarrier 13.56 MHz to ⁇ 847 kHz, ⁇ 424 kHz, ⁇ 212 kHz ...), and power transmitted or received too large.
- the coupling with such an antenna would be such that at a short distance between the 2 antennas ( ⁇ 2 cm for example), the mutual inductance created would be such that it would detune totally tuning the frequency of the two antennas, would collapse the power radiated by the reader, could saturate the radio stages of the silicon chip or could lead to destruction transponder silicon, since silicon does not have an infinite heat dispersal capacity.
- US-Al -2008 / 0450693 discloses an antenna device essentially for drive mode operation.
- the proposed embodiments impose in particular two different surfaces, one large and one small, on either the same inductance or on two inductances.
- the purpose of the last two embodiments is to make it possible to amplify the signal emitted at the center of the antenna by a small parallel inductance and, in the third embodiment, to eliminate the radiation holes on a location between the arrangement of the two antenna surfaces.
- the documents EP-A-1031 939 and FR-A-2777141 describe a device of an antenna circuit for operation in transponder mode having two independently electrically independent antenna circuits in the device described in the EP documents.
- a first antenna circuit is composed of a conventional inductor and the transponder chip.
- a second antenna circuit is composed of a coil winding forming an inductance associated with a planar capacitance called "resonator".
- the objective of the two embodiments is to allow the amplification of the electromagnetic signal received by the arrangement of the "resonator" for the first antenna circuit comprising the transponder.
- A-2777141 is to get the maximum efficiency between the 2 antenna circuits, so have the highest quality coefficient possible. It therefore falls on the same remarks of US-A-7 212 124.
- document EP-AI 970 840 describes a device comparable to the two previous devices described in documents EP-A-1031 939 and FR-A-2777141, in the sense that two resonators are used for the amplification of the electromagnetic field. received. We thus find the same remarks as before. In addition, the constraints indicated for EP-A-1031 939 and FR-A-2777141 are all the higher and difficult to achieve that the two resonators are close to each other.
- the object of the invention is generally to obtain an antenna circuit having a transmission efficiency and improved transmission implementation conditions.
- a first object of the invention is an RFID antenna circuit comprising an antenna formed by a number of at least three turns, the antenna having a first end terminal and a second end terminal. at least two access terminals for the connection of a load, at least one tuning capacity at a prescribed tuning frequency, having a first capacitance terminal and a second capacitance terminal, an intermediate tap connected to the antenna and separate end terminals, a first connection means of the intermediate tap at a first of the two access terminals, a second connection means of the second end terminal to the second capacitance terminal, characterized in it comprises third connection means of the first capacitance terminal and the second of the two access terminals to a first point of the antenna and at a second point of the antenna connected to the first point of the antenna by at least one turn of the antenna.
- said intermediate tap (A) is connected to the first end terminal (D) of the antenna (L) by at least one turn (S) of the antenna (L) said intermediate tap (A) being connected to the second end terminal (E) of the antenna (L) by at least one turn (S) of the antenna (L).
- the first point (P1) is connected to the intermediate tap (A) by at least one turn of the antenna. According to one embodiment of the invention, (FIGS. 13, 14, 15, 16) the first point (P1) is located at the intermediate tap (A).
- the first point (P1) is connected to the first end terminal (D) of the antenna (L) by at least one turn (S) of the antenna (L).
- the first point (Pl) being connected to the second end terminal (E) of the antenna (L) by at least one turn (S) of the antenna (L).
- the first point (P1) is located at the first end terminal (D).
- the second point (P2) is located at the first end terminal (D) of the antenna. According to one embodiment of the invention, the second point (P2) is located at the second end terminal (E) of the antenna.
- the second point (P2) is connected to the intermediate tap (A) by at least one turn of the antenna.
- the second point (P2) is connected to the first end terminal (D) of the antenna (L) by at least one turn (S) of the antenna (L) , the second point (P2) being connected to the second end terminal (E) of the antenna (L) by at least one turn (S) of the antenna (L).
- the first point (Pl) is located at the intermediate point (A) of the antenna (L) and the second point (P2) is located at the first terminal (D) of end of the antenna (L).
- said first and second points (P1, P2) are distinct from the first intermediate tap (A), the first point
- the second point (P2) is located at the first end terminal (D) of the antenna, the first point (P1) is connected to the socket intermediate (A) by at least one turn of the antenna.
- said intermediate tap (A) forms a first intermediate tap (A), the first intermediate tap (A) being connected to the first end terminal (D) of the antenna (L). ) by at least one turn
- the first intermediate tap (A) being connected to the second end terminal (E) of the antenna (L) by at least one turn (S) of the antenna ( L)
- the second point (P2) is located at a second intermediate point (P2) of the antenna (L)
- the second intermediate point (P2) being connected to the first point
- the capacitance comprises a first metal surface forming the first capacitance terminal (ClX), a second metallic surface forming the second capacitance terminal (ClE), at least one dielectric layer situated between the first metal surface and the second metal surface.
- the capacitance comprises at least one dielectric layer having a first side and a second side remote from the first side, a first metal surface forming the first capacitance terminal (ClX) on the first side of the dielectric layer, a second metal surface forming the second capacitance terminal (ClE) on the second side of the dielectric layer, a third metal surface forming a third capacitance terminal (ClF) remote from the first metal surface on the first side of the dielectric layer, the first capacitance terminal (ClX) defining a first capacitance value (C2) with the second capacitance terminal (C2) capacitance terminal (ClE), the third capacity terminal (ClF) defining a second capacitance value (Cl) with the second capacitance terminal (ClE), the first capacitance terminal (ClX) defining a third value (C 12) coupling capacitance with the third capacitance terminal (ClF), means for connecting the third capacitance terminal (ClF) to
- the antenna (L) comprises at least a first turn (S1), at least a second turn and at least a third turn, which are consecutive, the first turn (S1) going from the second end terminal (E) in a first winding direction at a cusp point (PR) connected to the second turn, the second and third turns (S2, S3) running from said cusp point (PR) to the first end terminal (D) in a second reverse winding direction of the first winding direction, the first point (P1) of the antenna (L) and the second point (P2) of the antenna (L) being located on the second and third turns (S2, S3).
- the antenna (L) comprises at least a first turn (S1) and at least a second turn (S2, S3) consecutive between two third and fourth points (E; D) of the antenna, the first turn (S1) being connected to the second turn (S2, S3) by a reversal point (PR), the first turn (S1) going from the third point (E) to the cusp point (PR) in a first winding direction, the second turn (S2, S3) from said reversal point (PR) to the fourth point (D) in a second reverse winding direction of the first winding direction.
- PR reversal point
- the antenna (L) comprises at least a first turn (Sl) and at least a second turn (S2,
- the first turn (S1) being connected to the second turn (S2, S3) by a reversal point (PR), the first turn (S1) going from the third point (E) to the cusp point (PR) in a first direction of winding, the second turn (S2, S3) going from said cusp point (PR) to the fourth point (D) in a second reverse winding direction of the first winding direction, the first point (P1) is located at the intermediate point (A) of the antenna (L) and the second point (P2) is located at the first terminal (D) end of the antenna (L).
- PR reversal point
- the antenna (L) comprises at least a first turn (S1) and at least a second turn (S2, S3) consecutive between two third and fourth points ( E; D) of the antenna, the first turn (S1) being connected to the second turn (S2, S3) by a reversing point (PR), the first turn (S1) going from the third point (E) to the point (PR) of reversal in a first winding direction, the second turn (S2, S3) from said reversal point (PR) to the fourth point (D) in a second direction of reverse winding of the first direction of winding, the first point (P1) is located at the first end terminal (D).
- PR reversing point
- At least one turn (S2) of the antenna comprises in series a winding (S2 ') of turns of smaller surface area surrounded with respect to the surface surrounded by the remainder (S2 ") of said turn (S2) or with respect to the surface surrounded by other turns of the antenna (3).
- the turns (S) of the antenna (3) are distributed over several distinct physical planes.
- the tuning capacity (Cl) comprises a second capacitance (ZZ) formed by at least a third turn (SC3) comprising two first and second ends (SC31, SC32) and by at least a fourth turn (SC4) having two first and second ends (SC41, SC42), the third turn (SC3) being electrically separated from the fourth turn (SC4) to define at least the capacity (C1) of agreement between the first end (SC31) of the third turn (SC3) and the second end (SC42) of the fourth turn (SC4), the first end (SC31) of the third turn being further away from the second end (SC42) of the fourth turn (SC4) than from the first end (SC41) of the fourth turn (SC4), the second end (SC32) of the third turn (SC3) being farther away from the first end (SC41) of the fourth turn (SC4) than from the second end (SC42) of the fourth turn (SC4), the second capacity being defined between the first end (SC31) ) of the third turn (SC3) and the second end
- first coupling means are provided to ensure coupling (COUPL 12) by mutual inductance between on the one hand the at least one turn (S2) of the antenna electrically connected in parallel with the first and second terminals (1, 2) of access and the other at least one turn (Sl) of the antenna
- second coupling means are provided to ensure coupling (COUPLZZ) mutual mutual inductance between said other at least one turn (S1) of the antenna and the at least one third and fourth turns (SC3, SC4) of the second capacitance (ZZ).
- the first coupling means are made by the proximity between on the one hand the at least one turn (S2) of the antenna electrically connected in parallel with the first and second terminals (1, 2) access and the other at least one turn (Sl) of the antenna
- the second coupling means are made by the proximity between the other at least one turn (Sl) of the antenna and the at least one third and fourth turns (SC3, SC4) of the second capacitance (ZZ).
- the third turn (SC3) and the fourth turn (SC4) are interleaved.
- the third turn (SC3) comprises at least a third section adjacent to a fourth section of the fourth turn (SC4).
- the sections extend parallel to each other.
- the tuning capacitance (Cl) comprises a first capacitance (C1) comprising a dielectric between the first capacitance terminal (ClX) and the second capacitance terminal (ClE), the first capacitance (C1). (Cl) being made in the form of a wire element, engraved, discrete or printed.
- FIG. 16, 18 another capacitor (C30) is connected between the second end terminal (E) and a point (PC1) of the antenna, which is connected to the second point (P2) by at least one turn of the antenna.
- FIGGS. 20, 22 the capacity
- the first capacitance (C30) is connected between the second end terminal (E) of the antenna and the second point (P2), which is connected to the first terminal (SC31) of the third turn (SC3), the intermediate point (A) being connected to the second terminal (SC42) of the fourth turn (SC4), which forms the first point (P1), the first point (SC41) of the fourth turn (SC4) forming the first end terminal (D) of the antenna.
- the first capacitance (C30) is connected between the second end terminal (E) of the antenna and the second point (P2), which is connected to the first terminal (SC31) of the third turn (SC3) by at least one turn (SlO), the intermediate point (A) being connected to the second terminal (SC42) of the fourth turn (SC4), which forms the first point (Pl ), the first terminal (SC41) of the fourth turn (SC4) forming the first terminal (D) end of the antenna.
- the first point (Pl) is located at the intermediate point (A), the second point (P2) is located at the second end point (E) of the 'antenna.
- the first point (P1) is located at the first end terminal (D) and the second point (P2) is located at the second terminal (E) of end.
- the at least one third turn (SC3) and the at least one fourth turn (SC4) define a second sub-circuit having a second natural resonance frequency, the first and second terminals (1).
- the at least one third turn (SC3) and the at least one fourth turn (SC4) define a second sub-circuit having a second natural resonance frequency, the first and second terminals (1).
- the at least one third turn (SC3) and the at least one fourth turn (SC4) define a second sub-circuit having a second natural resonance frequency
- the first and second terminals (1). , 2) of access define with a module (M) connected to them and with at least one turn (S2) connected to said first and second terminals (1, 2) of access a first sub-circuit having a first resonance frequency the turns being arranged so that the first natural resonance frequency and the second natural resonance frequency are substantially equal.
- the antenna comprises a mid-point (PM) for fixing a potential to a reference potential, with an equal number of turns on the section going from the first terminal (D) end to the midpoint (PM) and the section from the midpoint (PM) to the second terminal (E) end.
- the antenna is on a substrate.
- the antenna is a wire.
- said terminals (D, E, 1, 2, ClE, ClX), said tap (A), said points (P1, P2) and the capacitance (C1, ZZ) define a plurality at least three nodes, the nodes defining at least one first group (Sl) of at least one turn between two first distinct nodes (1, ClE) between them and at least one second group of at least one other turn ( S2) between two second nodes (1, 2) which are distinct from one another, at least one of the first nodes being different from at least one of the second nodes, first coupling means are provided to ensure coupling (COUPL 12) by mutual inductance between on the one hand the first group (Sl) of at least one turn and on the other hand the second group of at least one other turn (S2) in that the first group
- (S1) of at least one turn is positioned near the second group of at least one other turn (S2).
- said terminals (D, E, 1, 2, ClE, ClX), said tap (A), said points (P1, P2) and the capacitance (C1, ZZ) define a plurality at least three nodes, the nodes defining at least one first group (Sl) of at least one turn between two first nodes (1, ClE) distinct from each other, and at least one second group of at least one other turn (S2) between two second nodes (1, 2) which are distinct from one another and at least one third group of at least one other turn (SC3, SC4) between two third nodes (E, ClX) which are distinct from each other, at least one of first nodes being different from at least one of the second nodes, at least one of the first nodes being different from at least one of the third nodes, at least one of the third nodes being different from at least one of the second nodes, first means coupling are provided to ensure coupling (COUPL12) by mutual inductance between on the one hand the first group (Sl ) of at least one turn and
- SC4 in that the first group (Sl) of at least one turn is positioned near the third group of at least one other turn (SC3, SC4).
- the first group (Sl) of at least one turn is positioned between the second group of at least one other turn (S2) and the third group of at least one other turn ( SC3, SC3, SC4).
- the spacing distance between the turns (Sl, S2, SC3, SC4) belonging to different groups is less than or equal to 20 millimeters.
- the spacing distance between the turns (Sl, S2, SC3, SC4) belonging to different groups is less than or equal to 10 millimeters. According to one embodiment of the invention, the spacing distance between the turns (Sl, S2, SC3, SC4) belonging to different groups is less than or equal to 1 millimeter.
- the spacing distance between the turns (Sl, S2, SC3, SC4) belonging to different groups is greater than or equal to 80 micrometers.
- At least one reader (LECT) as a load and / or at least one transponder (TRANS) as a load is connected to the access terminals (1, 2).
- the circuit comprises a plurality of first distinct access terminals (1) and / or a plurality of second access terminals (2) which are distinct from each other.
- said at least one first access terminal (1) and said at least one second access terminal (2) are connected to at least one first load (Z1) having a first frequency tuned in a high frequency band and at least a second load (Z2) having a second tuning frequency prescribed in another ultra high frequency band.
- the invention it is possible to maintain a reasonable quality factor or limit its increase (the quality factor being equal to the resonance frequency divided by the bandwidth at -3 dB), in order to keep a reasonable bandwidth or slightly increased while maintaining or increasing the power radiated or received by the antenna and maintaining or decreasing the mutual inductance generated during coupling with the second external RFID antenna circuit.
- the number of turns is imposed by the compromise between the surface of the antenna and the silicon capacitance and the desired tuning frequency (around 13.56 MHz to 20 MHz).
- the desired tuning frequency around 13.56 MHz to 20 MHz.
- the circuit according to the invention in transmission or reception, makes it possible in particular to reduce the mutual inductance with the second antenna circuit
- N is the number of turns of the antenna
- R is the radius of the antenna
- x is the distance from the center of the antenna in the direction x normal to the antenna.
- N1 is the number of turns of a first antenna and N2 is the number of turns of a second antenna.
- the mutual inductance is a quantitative description of the flux coupling two loops of conductors.
- the coupling coefficient (K) introduces a qualitative prediction on the coupling of the antennas irrespective of their geometrical dimensions.
- Ll is the inductance of a first antenna and L2 is the inductance of a second antenna. Below are discussed possibilities of increasing the radio efficiency of a magnetic antenna.
- the magnetic field radiated or captured depends on the number of turns in the antenna. It is therefore necessary to increase the number of turns.
- the coupling coefficient is inversely related to the inductances of the 2 antennas. By decreasing the inductance of the antennas, then the coupling coefficient between the 2 antennas increases. It is also necessary to either increase the mutual inductance or limit the loss on mutual inductance.
- the mutual inductance is a function of the number of turns of the antennas. So by increasing the number of turns of the antenna, then the mutual inductance between the 2 antennas increases. Considering the coupling coefficient, ideally do not increase the inductances of the antennas.
- the bandwidth is a function of the inductance of the antenna and inverse function of the resistance of the antenna. It is therefore ideally to reduce the inductance and increase the resistance of the antenna.
- the mutual inductance must increase or be equal and / or the inductance of the antenna must decrease.
- the number of turns must increase or be equal.
- the inductance of the antenna must decrease or be equal and / or the resistance of the antenna must increase.
- the solution according to the invention gives the possibility of parameterizing, by the method of the invention, the distribution of the current in the antenna such as for example to have a different current density in at least two turns constituting the antenna therefore of do not have a uniform current in the antenna and therefore a different current in at least 2 different turns.
- the circuit includes means for making the distribution of current between the two ends of the antenna nonuniform.
- FIGS. 1A, 2A, 3A, 4A show embodiments of the transponder antenna circuit according to the invention
- FIGS. 1B, 2B, 3B, 4B represent equivalent electrical diagrams of the circuits of FIGS. 1A, 2A, 3A, 4A,
- FIGS. 5A, 6A, 7A, 8A, 9A, 1A1 represent embodiments of the reader antenna circuit according to the invention
- FIGS. 5B, 6B, 7B, 8B, 9B, HB show equivalent electrical diagrams of the circuits of FIGS. 5A, 6A, 7A, 8A, 9A, 1A1
- FIG. 10 is a view of FIG. an antenna in one embodiment
- the antenna circuit may be a circuit for emitting electromagnetic radiation by the antenna, as well as a circuit for receiving electromagnetic radiation by the antenna.
- the RFID antenna circuit is of the transponder type, to operate as a portable card, tag (in English: "tag"), to be integrated in a paper document, such as for example a document issued by an official authority, such as a passport, USB keys and SIM cards and (U) SIM cards called "RFID or NFC SIM card", thumbnails for Dual or Dual Interface card (the sticker itself having an RFID antenna / NFC), watches.
- the RFID antenna circuit is of the reader type to read, that is to say at least receive, the signal radiated by the RFID antenna of a transponder as defined in the first cases like mobile phones, personal organizers said "PDA", computers.
- the circuit comprises an antenna 3 formed by at least three turns S of a conductor on an insulating substrate SUB.
- the turns S have an arrangement defining an inductance L having a determined value between a first end terminal D of the antenna 3 and a second end terminal E of the antenna 3.
- the antenna 3 is formed by three consecutive turns S1, S2, S3 from the outer end terminal E to the inner end terminal D.
- a first access terminal 1 is connected by a conductor CONlA to an intermediate point or point A of the antenna 3 between its end terminals D, E.
- a capacity C according to a prescribed tuning frequency that is to say at a resonance frequency, for example from 13.56 MHz up to 20 MHz, is provided in combination with the inductance L of the antenna 3.
- the second end terminal E of the antenna 3 is connected by a conductor CON2E to the second terminal ClE of the capacitor C.
- the first terminal ClX of the capacitor C is connected by a conductor CON31 to the intermediate socket A forming a first point P1 of the antenna 3.
- a second access terminal 2 is connected by a conductor CON32 to the first end terminal D forming a second point P2 of the antenna 3.
- the point P2 is different from the point A.
- the two access terminals 1, 2 are used to connect a load. According to the invention, there is at least one turn S between the first point A, P1 and the second point P2.
- the intermediate tap A, P1 is connected to the end terminal D by at least one turn S of the antenna L, ie one turn S3 in FIG. 1.
- the intermediate tap A, P1 is connected to the second terminal E end of the antenna L by at least one turn S of the antenna L, ie two turns S1 and S2 in FIG. 1, where the intermediate tap A is located between the turns S3 and S2.
- CIX, P1, P2 form electrical nodes of the circuit.
- the points directly connected to each other form the same node, for example when the connection means are electrical conductors.
- Two distinct nodes are connected by at least one turn.
- the circuit of FIG. 1A has a first inductance L1, called active inductance, formed by the third turn S3, between the access terminals 1, 2. Between the intermediate tap A and the terminal E is a second inductance L2, called passive inductance, formed by the first turn
- the second inductor L2 is in parallel with the capacitor C between the intermediate tap A and the terminal E.
- the sum of the first inductance L1 and the second inductor L2 is equal to the total inductance L of the antenna 3. It is of course, the antenna 3 has a resistance in series with its inductance L as well as inter-turn coupling capacitors, which however have not been shown in all the figures.
- the capacity C can be of any type of technology and method of production.
- the capacitor C is of planar type being disposed on the free zone of the substrate, present in the middle of the turns S.
- the capacitor C is formed by a capacitor having a first surface SIX metal forming the first capacitance terminal ClX, a second metal surface SlE supported by the substrate and forming the second terminal ClE capacitance.
- One or more dielectric layers are located between the first metal surface S IX and the second metal surface SlE.
- FIGS. 1A and 1B makes it possible to increase the efficiency of the antenna 3.
- FIGS. 2A and 2B The embodiment shown in Figures 2A and 2B is a variant of the embodiment shown in Figures IA and IB.
- the intermediate tap A, P 1 is located between the turns
- the intermediate tap A, P1 is connected to the end terminal D by at least one turn S of the antenna L, ie two turns S2 and S3.
- the intermediate tap A, P1 is connected to the second end terminal E of the antenna L by at least one turn S of the antenna L, ie a turn S1.
- Capacity C is formed by a capacitor having one or more dielectric layers having a first side and a second side remote from the first side.
- the first metal surface SIX forms the first capacitance terminal ClX on the first side of the dielectric layer.
- a second metal surface SlE forms the second capacity terminal ClE on the second side of the dielectric layer.
- the first metal surface SIX defines with the second metal surface SlE a capacitance value C2.
- a third metal surface SlF forms a third terminal ClF of the capacitance C.
- the third metal surface SlF is situated on the same first side of the dielectric layer at a distance as the first metal surface SIX but at a distance from this first metal surface SIX.
- the third capacitance terminal ClF is connected by a conductor CON33 to the end terminal D.
- the third metal surface SlF defines with the second metal surface SlE a capacitance value C1.
- the third metal surface SlF is coupled to the first metal surface SIX in that they share the same reference terminal ClE formed by the surface S1E, to form a coupling capacitor C12.
- the circuit of FIG. 2A has a first inductance L1, called active inductance, formed by the second turn S2 and the third turn S3, between the access terminals 1, 2.
- a first inductance L1 called active inductance
- second inductor L2 intermediate A and the terminal E is a second inductor L2, called passive inductance, formed by the first turn S1.
- the sum of the first inductance L1 and the second inductance L2 is equal to the total inductance L of the antenna 3.
- the second inductance L2 is in parallel with the capacitance C2 between the intermediate tap A and the terminal E.
- the first inductor L1 is in parallel with the coupling capacitor C 12.
- the capacitor C1 is connected on the one hand to the terminal D and on the other hand to the terminal E.
- FIGS. 2A and 2B makes it possible to further increase the radio efficiency of antenna 3, because of the arrangement of capacitors C1 and C2 and of the coupling between capacitors C1 and C2.
- the embodiment shown in FIGS. 3A and 3B is a variant of the embodiment shown in FIGS. 2A and 2B.
- the first point P 1 is distinct from the first intermediate tap A and is spaced from this first intermediate tap A by at least one turn S.
- the antenna 3 is formed by four turns S1, S2, S3, S4 consecutive from the outer end terminal E to the inner end terminal D.
- the capacitor C is of the type of that of FIGS. 2A and 2B.
- the first intermediate tap A is located between turns S2 and S3.
- the first intermediate tap A is connected to the end terminal D by at least one turn S of the antenna L, ie the two turns S3 and S4.
- the intermediate tap A is connected to the second end terminal E of the antenna L by at least one turn S of the antenna L, ie the two turns S2 and S1.
- the access terminal 1 is connected to the first intermediate socket A by the conductor CONlA.
- the access terminal 2 is connected to the terminal D, which is not connected to the terminal ClF.
- the load Z is for example a chip generally designated by "silicon”. This chip can also be present in general between the access terminals.
- the terminal ClX is connected by the conductor CON31 to a first point P1 of the antenna 3, distinct from its terminals D, E.
- the first point P1 is located between the turns S3 and S4.
- the first point P1 is connected to the end terminal D by at least one turn S of the antenna L, ie the turn S4.
- the first point P1 is connected to the second end terminal E of the antenna L by at least one turn S of the antenna L, ie the three turns S3, S2 and S1.
- Terminal D forms the second point P2.
- the third capacitance terminal ClF is connected by a conductor CON33 to the access terminal 1.
- the terminal C IE is connected by a conductor CON2E to the terminal E.
- the circuit of FIG. 3A has a first inductance L1, called active inductance, formed by the turn S4 between the terminal 2 and the point P1. Between the point P1 and the tap A is a second inductor LI l, also called active, formed by the turn S3. Between the intermediate tap A and the terminal E is a third inductor L3, called passive inductance, formed by the two turns S2 and S1. The sum of the first inductance L1, the second inductance LI1 and the third inductance L3 is equal to the total inductance L of the antenna 3.
- the third inductance L3 is in parallel with the capacitance C1 between the intermediate socket A and the terminal E.
- the second inductance LI1 is in parallel with the coupling capacitance C12.
- the capacitor C2 is connected on the one hand to the point P1 and on the other hand to the terminal E.
- the capacitance C could be of the type of that of FIG. 1A, that is to say having instead of Cl and C 12 only the capacitance C between Pl and E in FIGS. 3A and 3B.
- FIGS. 3A and 3B makes it possible to increase the efficiency of antenna 3 because of the arrangement and combination of "active" and “passive” inductances and capacitors.
- the embodiment shown in Figures 4A and 4B is a variant of the embodiment shown in Figures IA and IB.
- the antenna 3 is formed from the second end terminal E to the first terminal D by a first turn S1, a second turn S2 and a third turn S3, which are consecutive.
- the turns S1 then S2 go from the second terminal E end to a point PR of a reversal in a first winding direction, corresponding to Figure 4A clockwise.
- the turn S3 goes from the recoiling point PR to the first end terminal D in a second direction of winding opposite to the first direction of winding, and therefore reverse clockwise in FIG. 4A.
- the turn S3 is reversed direction inward with respect to the outer turns S2 and S3.
- the first point P1 forming the first intermediate tap A of the antenna connected to the access terminal 1 is located at the recoil point PR.
- the positive direction of the current in the antenna 3 is that going from the recoiling point PR to the terminal E, coinciding in this example with the greatest number of turns going in the same direction, as indicated by the arrows drawn on the antenna 3.
- the arrows drawn on the turns S1 and S2 correspond to this positive direction of the current.
- the circuit of FIG. 4A has a second positive inductance + L2, called passive inductance, formed by the turns S2 and S1.
- first negative inductance -Ll Due to the PR point of reversal, appears between the intermediate socket A, P1 and the terminal D a first negative inductance -Ll, called active inductance, formed by the third turn S3, between the points P1 and P2.
- the sum of the first inductance L1 in absolute value and the second inductance L2 is equal to the total inductance L of the antenna 3.
- the negative inductance -L1 makes it possible to further reduce the mutual inductance generated by the antenna 3.
- the embodiment shown in Figs. 5A and 5B is a variation of the embodiment shown in Figs. 1A and 1B.
- the antenna In FIGS. 5A and 5B, the antenna
- a first access terminal 1 is connected by a connection means CONlA to a first intermediate tap A of the antenna 3 between its end terminals D, E.
- the connection means CONlA is for example a capacitor ClO.
- the second access terminal 2 is connected by a connection means CON32 to a second intermediate socket P2 forming a second point P2 of the antenna 3.
- the connection means CON32 is for example a capacitor C20.
- the second end terminal E of the antenna 3 is connected by a conductor CON2E to the second terminal ClE of the capacitor C.
- the first terminal ClX of the capacitor C is connected by a conductor CON31 to the terminal D, P1 of the antenna 3.
- the two access terminals 1, 2 are used to connect a load.
- the intermediate tap A is located between the turns S3 and S2.
- the intermediate plug P2 is located between the turns S1 and S2.
- the intermediate terminal A is connected to the end terminal D by at least one turn S of the antenna L, ie the turn S 3 in the embodiment shown.
- the intermediate tap A is connected to the second end terminal E of the antenna L by at least one turn S of the antenna
- the intermediate plug P2 is connected to the end terminal D by at least one turn S of the antenna L, ie the turn S2 and the turn S3 in the embodiment shown.
- the intermediate plug P2 is connected to the second end terminal E of the antenna L by at least one turn S of the antenna L, the turn S1 in the embodiment shown.
- the circuit of FIG. 5A has a first inductance L1, called active inductance, formed by the second turn S2, between points A and P2.
- a second inductor L2 called passive inductance, formed by the first turn S1.
- the sum of the first inductance L1, the second inductance L2 and the third inductance L3 is equal to the total inductance L of the antenna 3.
- FIGS. 5A and 5B makes it possible to increase the efficiency of the antenna 3.
- FIGS. 6A and 6B is a variant of the embodiment shown in FIGS. 5A and 5B.
- a fourth additional tuning capacitor C4 is connected between the intermediate tap A and the second tap P2, in parallel with the first inductor L1.
- the fourth capacitor C4 participates in the frequency tuning with C, particularly on the second inductor L2.
- the embodiment shown in FIGS. 6A and 6B makes it possible to increase the efficiency of the antenna 3.
- FIGS. 7A and 7B is a variant of the embodiment shown in FIGS. 5A and 5B.
- the antenna 3 is formed by four consecutive turns S1, S21, S22, S3 from the outer end terminal E to the inner end terminal D.
- the first point P1 is formed by the terminal terminal D of the antenna.
- Intermediate tap A is located between turns S3 and S22.
- the intermediate plug P2 is located between the turns S1 and S21.
- the intermediate terminal A is connected to the end terminal D by at least one turn S of the antenna L, ie the turn S3 in the embodiment shown.
- the intermediate tap A is connected to the second end terminal E of the antenna L by at least one turn S of the antenna
- the catch intermediate P2 is connected to the terminal D end by at least one turn S of the antenna L, three turns S21, S22 and S3 in the embodiment shown.
- the intermediate plug P2 is connected to the second end terminal E of the antenna L by at least one turn S of the antenna L, the turn S1 in the embodiment shown.
- the circuit of FIG. 5A has a first inductance L1, called active inductance, formed by the three second turns S21, S22 and S3, between the points P1 and P2. Between the intermediate tap P2 and the terminal E is a second inductor L2, called passive inductance, formed by the first turn S1. Between the intermediate tap A and the terminal D is a third inductor L3, called passive inductance, formed by the third turn S3.
- the sum of the first inductance L1, the second inductance L2 and the third inductance L3 is equal to the total inductance L of the antenna 3.
- FIGS. 7A and 7B makes it possible to increase the efficiency of the antenna 3 with a larger number of turns.
- FIGS. 8A and 8B is a variant of the embodiment shown in FIGS. 5A and 5B.
- the antenna In FIGS. 8A and 8B, the antenna
- the first point P1 is formed by the end terminal D.
- At least one turn S between the first point P1 and the second point P2 ie the turns S2, S31, S32, S33 and S34, that is to say five second turns in the mode. embodiment shown.
- the intermediate tap A is located between the turns S2 and S31.
- the intermediate plug P2 is located between the turns S1 and S2.
- the intermediate tap A is connected to the end terminal D by at least one turn S of the antenna L, ie the four turns S31, S32, S33 and S34 in the embodiment shown.
- the intermediate tap A is connected to the second end terminal E of the antenna L by at least one turn S of the antenna L, ie the two turns S1, S2 in the embodiment shown.
- the intermediate tap P2 is connected to the end terminal D by at least one turn S of the antenna L, ie the five turns S2, S31, S32, S33 and S34 in the embodiment shown.
- the intermediate plug P2 is connected to the second end terminal E of the antenna L by at least one turn S of the antenna L, the turn S1 in the embodiment shown.
- the circuit of FIG. 8A has a first inductance L1, called active inductance, formed by the second turns
- the sum of the first inductance L1, the second inductance L2 and the third inductance L3 is equal to the total inductance L of the antenna 3.
- the embodiment shown in FIGS. 8A and 8B makes it possible to increase the efficiency of the antenna 3 with even more turns.
- the capacitor C is formed for example by a capacitor of the planar type as in FIG.
- the capacitance C, Cl, C2 is for example of the described planar type.
- the capacitance C may be in the form of an added capacitor component, instead of being of the planar type.
- the embodiment shown in FIGS. 9A and 9B is a variant of the embodiment shown in FIGS. 5A and 5B.
- the antenna 3 is formed from the second end terminal E to the first terminal D by a first turn S1, a second turn S2 and a third turn S3, which are consecutive.
- the turn S1 goes from the second end terminal E to a rewind point PR in a first winding direction corresponding to FIG. 9A clockwise.
- turns S2 then S3 go from the reversal point PR to the first end terminal D in a second winding direction opposite to the first direction of winding, and therefore reverse clockwise in FIG. 9A.
- the turn S1 is of direction reversed outside with respect to the internal turns S2 and S3.
- the first point P1 is formed by the terminal D.
- the second point P2 forming the second intermediate point of the antenna connected to the access terminal 2 is located at the point PR of cusp.
- the circuit of FIG. 9A has a first positive inductance L1, called active inductance, formed by the second turn S2, between points A and P2.
- the sum of the first inductance L1, the second inductance L2 in absolute value and the third inductance L3 is equal to the total inductance L of the antenna 3.
- the negative inductance -L2 makes it possible to further reduce the mutual inductance generated by the antenna 3.
- connection means CONlA is for example an electrical conductor.
- connection means CON32 is for example an electrical conductor.
- the capacitor C is of the type of that of FIG. 2A.
- the second end terminal E of the antenna 3 is connected by a conductor CON2E to the second terminal ClE of the capacitor C.
- the first terminal D is connected to the terminal ClF of the capacitor C by the conductor CON33.
- the point P1 is formed by the terminal D.
- the first terminal ClX of the capacitor C is connected by a conductor CON31 to the terminal D.
- Terminal ClF is connected to terminal 2 access.
- the capacitance C1 is in parallel with the inductance L2 between the terminal E and the point P2.
- the capacitor C2 is connected between the terminals D and E.
- the coupling capacitor C 12 is connected between the second point P2 and the terminal D.
- connection means such as CONlA, CON32, terminals 1, 2 of access to the antenna can be capacitance, conductor or other, such as for example active elements, in particular of the transistor or amplifier type.
- any additional load or frequency or power matching circuit can be connected to the access terminals 1, 2, for example a chip, in particular a silicon-based chip, as well in the so-called transponder case. only in the case said reader.
- connection means of the antenna access terminals 1, 2 of FIGS. 5A, 6A, 7A, 8A, 9A may also be conductors. It is also possible to add an active or passive element, such as, for example, a capacitor, to terminals 1, 2 of access to FIGS. 1A, 2A, 3A, 4A.
- an active or passive element such as, for example, a capacitor
- a number of taps may be provided. turns equal to one, two or more between the first point P1 and the end D.
- the antenna can be made of wire, engraved, printed (printed circuit board), copper, aluminum, silver particle or aluminum and any other electrical conductor and any other non-electrical conductor but chemically predicted to this effect.
- the turns of the antenna can be made in multi-layers, superimposed or not, in whole or in part.
- at least one turn S2 of the antenna may comprise in series a winding S2 'of turns of smaller surface area surrounded with respect to the surface surrounded by the remainder S2 "of the turn S2 or relative at the surface surrounded by the other turns of the antenna 3, in order to increase the resistance or the inductance of the turn S2 without accentuating the coupling, the mutual inductance and the general radiation of the antenna 3.
- the capacity (s) can be in discrete element (component) or made in planar technology.
- the capacitance (s) can be added to the antenna during the process of manufacturing the windings of turns as an element outside the printed circuit board and the antenna, especially in wire technology.
- the capacitance (s) can be integrated in a module, in particular silicon.
- the capacitance (s) can be integrated and realized on a printed circuit board.
- the turns S of the antenna 3 can be distributed over several different physical planes, for example parallel.
- the turns are formed of sections, for example rectilinear but may also have any other shape.
- the turns of the antenna may be in the form of a wire which will then be heated to be embedded on or in an insulating substrate.
- the turns of the antenna can be etched on an insulating substrate.
- the turns of the antenna may be on opposite sides of an insulating substrate.
- the turns are for example in the form of parallel ribbons.
- a load module M such as for example a chip, the module M being connected between the first access terminal 1 and the second terminal 2 access.
- the antenna L is formed by the turns S1, S2 situated between the first end terminal D and the second end terminal E.
- the first terminal D is connected to the second access terminal 2 forming the second point P2.
- the tuning capacitance Cl at a prescribed tuning frequency comprises a first capacitance terminal ClX and a second capacitance terminal ClE.
- the first capacitance terminal ClX is connected to the first terminal 1 by means CON31 at the first access terminal 1.
- the second capacity terminal ClE is connected to the second end terminal E.
- the second point P2 is formed by the second access terminal 2.
- the first point Pl of the antenna and the intermediate point A of the antenna are formed by the first terminal 1 access.
- the second point P2, 2 of the antenna L is connected to the first point P1, 1, A of the antenna L by at least a first turn S1 of the antenna L.
- the antenna L is formed by one or more second turns S1 between E and A, that is, for example, by two second turns S 1, connected by the point A to one or more turns S2 going from the point A to the terminal D, by example three turns S2.
- the capacity Cl of agreement is formed by one or more third turns SC3 (for example five turns SC3) having two first and second ends SC31, SC32 and by one or more fourth turns SC4 (for example five turns SC4) comprising two first and second ends SC41, SC42.
- third turns SC3 for example five turns SC3
- fourth turns SC4 for example five turns SC4
- the at least one third turn SC3 is distinct from the turns S1, S2 forming the antenna L and is connected to one E of the end terminals of the antenna L.
- the at least one fourth turn SC4 is distinct from the turns S1 , S2 forming the antenna L and is electrically separated from the third turns SC3, for example along the third turns SC3, so that the turns SC3 are arranged facing the turns SC4, for example by having parallel sections.
- the end SC31 forms the terminal ClE and is connected to the terminal E.
- the end SC32 is free and isolated from SC4.
- the SC41 end is free and isolated from SC3.
- the end SC42 forms the terminal ClX and is connected to the intermediate socket A, 1, Pl.
- the end SC31 is remote from the end SC42, while being close to and isolated from the end SC41.
- the end SC42 is remote from the end SC31, while being close and isolated from the end SC32.
- the impedance ZZ between the connection ends SC31, SC42 can for example be seen as comprising a capacitive-inductive resonant parallel and / or series circuit according to FIG. 33, comprising two parallel branches, with in one branch the capacitance Cl and in the other branch a capacitance in series with an inductor.
- the ZZ impedance seen between connection ends SC31, SC42 has the capacitance Cl.
- the value of the capacitance C1 of the impedance ZZ depends on the relation between the turns SC3 and SC4, and in particular of their mutual arrangement, for example adjacent.
- FIG. 12 there is at least one turn S1 between the intermediate tap A connected to the access terminal 1 of the module and the impedance ZZ formed by the at least one third turn SC3 and the at least one fourth turn SC4. .
- the impedance ZZ formed by the at least one third turn SC3 and the at least one fourth turn SC4 is self-resonant, because a capacitance and a series and / or parallel inductance are contained in the impedance ZZ.
- the equivalent circuit diagram of the circuit shown in FIG. 12 is represented in FIG. 34.
- the at least one third turn SC3 and the at least one fourth turn SC4 make it possible to equalize the tuning frequency of the module M (for example chip) being in parallel with an inductor (turn (s) S2) on the tuning frequency of the circuit formed by the at least one third turn SC3 and the at least one fourth turn SC4, for example to have the tuning frequency prescribed at 13.56 MHz.
- the aim is to have the inductance contained in the self-resonant circuit ZZ, SC3, SC4 as small as possible in order to allow the integration of the antenna circuit into a small area ⁇ 16 cm 2, for example a tag (tag in English) or a sticker circuit (in English: sticker).
- one of the advantages of the invention is the possibility of parameterizing the mutual inductance between the antenna circuits, for example, between, on the one hand, the antenna circuit comprising the transponder chip or reader and on the other hand a first and a second antenna part, so as to set the mutual final inductance of the transponder or reader system.
- at least one electrical connection is provided between a first antenna circuit comprising the chip and at least one second (or more) antenna circuit comprising at least one capacitive element.
- the devices according to the documents EP-A-1031 939 and FR-A-2777141 do not make it possible to produce two frequency agreements that are almost independent of one another or two frequency agreements that are very close to one another. other example ⁇ 10 MHz, ⁇ 2MHz or ⁇ 500KHz or 2 frequency agreements combined in the same frequency range.
- the greater the mutual inductance between the 2 antenna circuits the more the 2 so-called "natural" agreements of the 2 antenna circuits increase. If we want these two frequency agreements to be close, we must reduce the mutual inductance by, for example, decreasing strongly one of the antenna circuit surfaces relative to the other which induces a considerable loss in the transponder efficiency.
- Means are provided for coupling COUPL 12 by mutual inductance between neighboring turns S1 and S2.
- Means are provided for coupling COUPLZZ by mutual inductance between the neighboring turns S1 and SC3, SC4 of the impedance ZZ.
- This coupling by mutual inductance is for example due to the arrangement of Sl close to S2 and to the arrangement of S1 close to SC3, SC4.
- the antenna circuit has at least two mutually intrinsic intrinsic inductances coupled between them: between Sl and S2, between Sl and ZZ.
- the column AE indicates the number of turns S1 between A and E.
- the column AD indicates the number of turns S2 between A and D.
- the column P1-P2 indicates the number N12 equal to at least one turn S of the antenna L between points P1 and P2.
- the last column on the right indicates either the presence of the impedance ZZ formed by the turns SC3 and SC4, indicating in this case the number of ZZ turns in parentheses, ie the presence of an additional capacitor C30, called the first capacitor, formed by a capacitive dielectric component between its terminals.
- the term "dielectric capacitive component” means any embodiment allowing the arrangement of a capacity. If necessary, this capacitive component may be formed by another circuit ZZ.
- two capacities C30 and ZZ are provided.
- the capacitance ZZ is formed by turns SC3, SC4 between SC42 and SC31 (for example 4 turns), with SC31 forming ClXZ.
- another capacity C30 formed by a capacitive component is provided between E and ClXCl.
- the terminal ClXCl is connected to a point PC1 of the antenna L, which is at a distance of P2 from at least one turn, for example a turn to this figure.
- ZZ is between ClXZ and ClE
- C30 is a capacitive component between E and ClXCl.
- two capacitors C30 and ZZ are provided in series between the terminal ClE, E and the terminal ClX, Pl formed by the end SC42.
- the capacitance ZZ is formed by the turns SC3, SC4 between SC42 and SC31 (for example 4 turns), with SC31 forming PC1.
- another capacity C30 formed by a capacitive component is provided between E and PCl.
- the terminal PC1 is connected to the point 2, P2 of the antenna L.
- the terminal ClE, E is formed by the end of the or turns Sl, remote from the terminal 2.
- two capacitors C30 and ZZ are provided in series between the terminal
- the capacitance ZZ is formed by the turns SC3, SC4 between SC42 and SC31 (for example 4 turns), with SC31 connected in series with the point PC1 by one or more turns SlO (for example two turns SlO).
- another capacity C30 formed by a capacitive component is provided between E and PCl.
- the terminal PCl is connected to the point 2, P2 of the antenna L.
- the terminal ClE, E is formed by the end of the or turns Sl, remote from the terminal 2.
- FIGS. 23 and 24 are provided two points PR1 and PR2 for reversing in the turns S1 between A and E.
- the point PR1 is away from A by at least one turn and E by at least one turn (for example two turns between A and PR1 and two turns between PR1 and E).
- the point PR2 is away from A by at least one turn and E by at least one turn (for example a turn between A and PR2 and three turns between PR2 and E).
- PR2 is away from P2 by at least one turn.
- FIG. 25 are provided two points PR1 and PR2 for reversing in the turns S1 between A and E.
- the point PR1 is located in A.
- the point PR2 is away from A by at least one turn and E by at least one turn (for example a turn between A and PR2 and three turns between PR2 and E).
- FIG. 26 are provided two points PR1 and PR2 for reversing in the turns S1 between A and E.
- the point PR1 is located in A.
- the point PR2 is away from A by at least one turn and from E by at least one turn (for example a turn between A and PR2 and four turns between PR2 and E).
- FIG. 27 are provided two points PR1 and PR2 for reversing in the turns S1 between A and D.
- the point PR1 is away from A by at least one turn and D by at least one turn (for example a turn between A and PR1 and two turns between PR1 and D).
- the point PR2 is away from A by at least one turn and D by at least one turn (for example two turns between A and PR2 and a turn between PR2 and D).
- a mid-point PM for fixing a potential to a reference potential is provided on the antenna halfway between the two end terminals D and E of the antenna.
- the midpoint PM is distant from the other points 1, A, 2, P2, ClE, E, ClX, P1, D by at least a turn of the antenna.
- the midpoint PM is remote from the other points 1, A, 2, P2, ClE, E, ClX, P1, D by at least a half-turn of the antenna and is for example on the other side with respect to the side having these points 1, A, 2, P2, ClE, E, ClX, Pl, D.
- the number of turns between the points mentioned on the antenna (1, A, 2, P2, ClE, E, ClX, P1, D, as well as the cusp point (s)) can be whatever, for example by being greater than or equal to one.
- These numbers of turns may be integers, for example as shown in the figures, or not integers such as for example in FIGS. 31 and 32.
- FIGS. 12, 13, 14, 19, 21, 25, 26 is provided a point PR3 of reversal at point 1, A, that is to say an inversion of the winding direction of the turns of the antenna to the passage 1, A from D to E.
- point 1, A that is to say an inversion of the winding direction of the turns of the antenna to the passage 1, A from D to E.
- Figures 15, 16, 17, 18, 22, 23, 24, 27, 28, 29, 30, 31 and 32 we go through the point 1, A going from D to E keeping the same winding direction of the turns of the antenna.
- PR2 PR1 other than 1, A in FIGS. 23, 24, 26, 27.
- the first access terminal is distinct from the second terminal of FIG. access in that the first access terminal is separated from the second access terminal by one or more turns.
- a transponder TRANS as load Z is connected to the first terminal 1 and the second terminal 2, as for example in FIG.
- FIGS 35 to 46 correspond to any of the embodiments described above, where the capacities ClO, C20 present where appropriate have not been represented.
- a reader LECT as load Z is connected to the first terminal 1 and the second terminal 2, as for example in FIG.
- a transponder TRANS as the first load Z1 and a reader LECT as the second load Z2 can be connected to the same first terminal 1 and the same second terminal 2, as shown for example in FIGS. 37 and 38, the TRANS transponder and the reader LECT being electrically in parallel with FIG.
- the antenna may comprise, for the connection of several separate loads, a plurality of first distinct access terminals 1 and / or a plurality of second access terminals 2 distinct from each other.
- First distinct access terminals 1 are separated from each other by minus one turn of the antenna.
- Separate second terminals 2 are separated from each other by at least one turn of the antenna.
- a transponder TRANS as the first load Z1 is connected between the first access terminal 1 and the second access terminal 2, while an LECT reader as the second load Z2 is connected. between another first access terminal 11 and another second access terminal 12.
- a transponder TRANS as the first load Z1 is connected between the first access terminal 1 and the second access terminal 2, while an LECT reader as the second load Z2 is connected. between another second access terminal 12 and the second access terminal 2 (successive access terminals).
- a plurality of RFID applications, and / or RFID reader and / or RFID transponder may be connected between the first and second identical access terminals 1, 2 or between first and second access terminals 1, 2 distinct, as for example the applications designated by APPLl, APPL3 in Figure 41 between first and second terminals 1, 2, access distinct 1, 2, 12, 13 successive.
- the role of the first access terminal 1 and the role of the second access terminal 2 can be inverted.
- the load Z connected to the access terminals 1, 2 has, for example, a prescribed tuning frequency, as shown in FIG. 42. This tuning frequency is fixed.
- This prescribed tuning frequency is for example in a high frequency band (HF), the high frequency band covering frequencies greater than or equal to 30 kHz and less than 80 MHz.
- This tuning frequency is for example 13.56 MHz.
- the tuning frequency may also be in an ultra high frequency (UHF) band, the ultra high frequency band covering frequencies greater than or equal to 80 MHz and less than or equal to 5800 MHz.
- the tuning frequency is 868 MHz or 915 MHz.
- said at least one first access terminal 1 and said at least one second access terminal 2 are connected to at least one first load Z1 having a first prescribed frequency of agreement and to at least one second charge Z2 having a second prescribed tuning frequency different from the first prescribed tuning frequency.
- a first load Z1 having the first prescribed tuning frequency in the high frequency band and a second load Z2 having the second tuning frequency prescribed in the ultra high frequency band are connected to the terminals 1, 2 d. 'access.
- the first load Z1 having the first tuning frequency prescribed in the high frequency band and a second load Z2 having the second tuning frequency prescribed in the ultra high frequency band are connected to the same first terminal 1 access and the same second terminal 2 access.
- the first load Z1 having the first tuning frequency prescribed in the high frequency band is connected between the first access terminal 1 and the second access terminal 2 while the second Load Z2 having the second tuning frequency prescribed in the ultra high frequency band is connected between another first access terminal 11 and another second access terminal 12.
- the first load Z1 having the first tuning frequency prescribed in the high frequency band is connected between the first access terminal 1 and the second access terminal 2
- the second load Z2 having the second tuning frequency prescribed in the ultra-high frequency band is connected between another second access terminal 12 and the second access terminal 2 (successive access terminals), the number of turns between the two terminals being different between the two figures.
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011540081A JP5592895B2 (ja) | 2008-12-11 | 2009-12-09 | Rfidアンテナ回路 |
US13/133,640 US8749390B2 (en) | 2008-12-11 | 2009-12-09 | RFID antenna circuit |
CA2746241A CA2746241C (fr) | 2008-12-11 | 2009-12-09 | Circuit d'antenne rfid |
BRPI0922402A BRPI0922402A2 (pt) | 2008-12-11 | 2009-12-09 | Circuito de antena rfid |
SG2011042579A SG172085A1 (en) | 2008-12-11 | 2009-12-09 | Rfid antenna circuit |
EP09805691A EP2377200B1 (fr) | 2008-12-11 | 2009-12-09 | Circuit d'antenne rfid |
CN200980154658.5A CN102282723B (zh) | 2008-12-11 | 2009-12-09 | Rfid天线电路 |
IL213449A IL213449A (en) | 2008-12-11 | 2011-06-09 | RFID antenna circuit |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FRPCT/FR2008/052281 | 2008-12-11 | ||
PCT/FR2008/052281 WO2010066955A1 (fr) | 2008-12-11 | 2008-12-11 | Circuit d'antenne rfid |
FR0953791A FR2939936B1 (fr) | 2008-12-11 | 2009-06-08 | Circuit d'antenne rfid |
FR0953791 | 2009-06-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2010066799A2 true WO2010066799A2 (fr) | 2010-06-17 |
WO2010066799A3 WO2010066799A3 (fr) | 2010-08-19 |
Family
ID=41137346
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2008/052281 WO2010066955A1 (fr) | 2008-12-11 | 2008-12-11 | Circuit d'antenne rfid |
PCT/EP2009/066749 WO2010066799A2 (fr) | 2008-12-11 | 2009-12-09 | Circuit d'antenne rfid |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2008/052281 WO2010066955A1 (fr) | 2008-12-11 | 2008-12-11 | Circuit d'antenne rfid |
Country Status (12)
Country | Link |
---|---|
US (1) | US8749390B2 (fr) |
EP (1) | EP2377200B1 (fr) |
JP (1) | JP5592895B2 (fr) |
KR (1) | KR101634837B1 (fr) |
CN (1) | CN102282723B (fr) |
BR (1) | BRPI0922402A2 (fr) |
CA (1) | CA2746241C (fr) |
FR (1) | FR2939936B1 (fr) |
IL (1) | IL213449A (fr) |
SG (1) | SG172085A1 (fr) |
TW (1) | TWI524587B (fr) |
WO (2) | WO2010066955A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2963140A1 (fr) * | 2010-07-20 | 2012-01-27 | Oberthur Technologies | Dispositif a microcircuit de type sans contact |
CN102412871A (zh) * | 2010-09-21 | 2012-04-11 | 英赛瑟库尔公司 | 对涡电流敏感的nfc卡 |
WO2012052631A2 (fr) | 2010-10-19 | 2012-04-26 | Inside Secure | Appareil comportant des moyens de communication par couplage inductif |
KR101273184B1 (ko) | 2011-08-02 | 2013-06-17 | 엘지이노텍 주식회사 | 안테나 및 이를 위한 이동 단말기 |
Families Citing this family (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5709690B2 (ja) * | 2011-08-17 | 2015-04-30 | タイコエレクトロニクスジャパン合同会社 | アンテナ |
US9590761B2 (en) | 2011-09-23 | 2017-03-07 | Commscope Technologies Llc | Detective passive RF components using radio frequency identification tags |
CN102544709B (zh) * | 2011-12-21 | 2014-07-30 | 上海坤锐电子科技有限公司 | 一种移动支付转接桥的通信距离均衡的转接桥天线 |
FR2985863B1 (fr) | 2012-01-18 | 2014-02-14 | Inside Secure | Circuit d'antenne pour dispositif nfc |
FR2991511B1 (fr) * | 2012-06-01 | 2014-07-04 | Eray Innovation | Circuit d'antenne rfid et/ou nfc |
CN103515698A (zh) * | 2012-06-28 | 2014-01-15 | 比亚迪股份有限公司 | 一种近场通讯天线及电子设备 |
US9934895B2 (en) * | 2012-06-29 | 2018-04-03 | Intel Corporation | Spiral near field communication (NFC) coil for consistent coupling with different tags and devices |
KR20140046754A (ko) * | 2012-10-11 | 2014-04-21 | 삼성메디슨 주식회사 | 초음파 프로브의 움직임에 기초하여 초음파 프로브를 자동으로 활성화하는 초음파 시스템 및 방법 |
KR102144360B1 (ko) | 2012-12-05 | 2020-08-13 | 삼성전자주식회사 | 스마트 근거리무선통신 안테나 매칭 네트워크 시스템 및 그것을 포함한 유저 장치 |
US9270343B2 (en) * | 2012-12-20 | 2016-02-23 | Nxp B.V. | Wireless charging recognizing receiver movement over charging pad with NFC antenna array |
TW201426220A (zh) * | 2012-12-21 | 2014-07-01 | Hon Hai Prec Ind Co Ltd | 手錶及其nfc天線 |
TW201426221A (zh) * | 2012-12-21 | 2014-07-01 | Hon Hai Prec Ind Co Ltd | 具有nfc天線的手錶 |
US9293825B2 (en) | 2013-03-15 | 2016-03-22 | Verifone, Inc. | Multi-loop antenna system for contactless applications |
US9819085B2 (en) * | 2013-05-13 | 2017-11-14 | Amotech Co., Ltd. | NFC antenna module and portable terminal comprising same |
JP6146272B2 (ja) * | 2013-11-22 | 2017-06-14 | トヨタ自動車株式会社 | 受電装置および送電装置 |
KR102184679B1 (ko) | 2013-12-20 | 2020-11-30 | 삼성전자주식회사 | 근거리무선통신 안테나 매칭 네트워크 시스템 및 그것을 포함한 유저 장치 |
US20150188227A1 (en) * | 2013-12-31 | 2015-07-02 | Identive Group, Inc. | Antenna for near field communication, antenna arrangement, transponder with antenna, flat panel and methods of manufacturing |
KR101664439B1 (ko) * | 2014-06-13 | 2016-10-10 | 주식회사 아모텍 | Nfc 안테나 모듈 및 이를 구비하는 휴대 단말 |
EP3207504A4 (fr) * | 2014-10-14 | 2018-10-31 | Confidex Oy | Transpondeur rfid et réseau de transpondeurs rfid |
PL3010084T3 (pl) * | 2014-10-17 | 2020-01-31 | Synoste Oy | Urządzenie z anteną odbiorczą i powiązany system przenoszenia mocy |
FR3032050B1 (fr) * | 2015-01-27 | 2018-02-16 | Starchip | Puce microelectronique avec multiples plots |
US10333200B2 (en) | 2015-02-17 | 2019-06-25 | Samsung Electronics Co., Ltd. | Portable device and near field communication chip |
EP3231132A4 (fr) * | 2015-02-20 | 2018-06-27 | Hewlett-Packard Development Company, L.P. | Dispositif d'authentification d'utilisateur |
US10819007B2 (en) * | 2015-05-21 | 2020-10-27 | Sharp Kabushiki Kaisha | Display device |
KR102511755B1 (ko) * | 2015-06-12 | 2023-03-21 | 삼성전자주식회사 | 근거리 무선 통신 안테나 및 이를 포함하는 근거리 무선 통신 장치 |
CN106329096B (zh) * | 2015-06-30 | 2020-03-31 | 比亚迪股份有限公司 | Nfc天线 |
CN108370095A (zh) * | 2015-08-06 | 2018-08-03 | 薄膜电子有限公司 | 具有集成铁氧体屏蔽和天线的无线通信装置及其制造和使用方法 |
US10692643B2 (en) * | 2015-10-27 | 2020-06-23 | Cochlear Limited | Inductance coil path |
US10338753B2 (en) | 2015-11-03 | 2019-07-02 | Microsoft Technology Licensing, Llc | Flexible multi-layer sensing surface |
US10955977B2 (en) | 2015-11-03 | 2021-03-23 | Microsoft Technology Licensing, Llc | Extender object for multi-modal sensing |
US10649572B2 (en) | 2015-11-03 | 2020-05-12 | Microsoft Technology Licensing, Llc | Multi-modal sensing surface |
CN107368616B (zh) * | 2016-05-11 | 2021-03-09 | 中芯国际集成电路制造(上海)有限公司 | 实现射频识别的仿真模型电路及其仿真方法 |
TWI625896B (zh) * | 2016-05-13 | 2018-06-01 | Chen Yi Feng | Broadband multi-frequency dual loop antenna |
US10055619B2 (en) * | 2016-06-17 | 2018-08-21 | Intermec, Inc. | Systems and methods for compensation of interference in radiofrequency identification (RFID) devices |
CN106252842A (zh) * | 2016-07-29 | 2016-12-21 | 中国科学院微电子研究所 | 一种增益天线及通信系统 |
CN106299667A (zh) * | 2016-09-26 | 2017-01-04 | 上海德门电子科技有限公司 | 可调自谐振频率的nfc天线装置及电子设备和方法 |
WO2018056101A1 (fr) * | 2016-09-26 | 2018-03-29 | 株式会社村田製作所 | Dispositif antenne et instrument électronique |
KR102452409B1 (ko) * | 2016-10-19 | 2022-10-11 | 삼성전자주식회사 | 방사 부재를 포함하는 전자 장치 |
US10152837B1 (en) | 2016-12-29 | 2018-12-11 | George Mallard | System and method for integrating credential readers |
WO2018153019A1 (fr) * | 2017-02-27 | 2018-08-30 | 华为技术有限公司 | Antenne nfc et dispositif terminal |
BR102018007799A2 (pt) * | 2018-04-18 | 2019-11-05 | Centro Nac De Tecnologia Eletronica Avancada S A | dispositivo eletrônico de identificação por radiofrequência do tipo módulo |
GB2576319B (en) * | 2018-08-13 | 2021-01-06 | Pragmatic Printing Ltd | Capacitively coupled RFID communication |
WO2020157534A1 (fr) * | 2019-01-31 | 2020-08-06 | Linxens Holding | Carte à puce, support d'antenne pour carte à puce et procédé de fabrication d'un support d'antenne pour carte à puce |
SE545998C2 (en) * | 2019-09-19 | 2024-04-09 | Husqvarna Ab | Wireless identification tags and corresponding readers |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3823403A (en) | 1971-06-09 | 1974-07-09 | Univ Ohio State Res Found | Multiturn loop antenna |
Family Cites Families (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL100451A (en) | 1990-12-28 | 1994-08-26 | Bashan Oded | Contactless data communication system |
US5541399A (en) | 1994-09-30 | 1996-07-30 | Palomar Technologies Corporation | RF transponder with resonant crossover antenna coil |
US5955723A (en) | 1995-05-03 | 1999-09-21 | Siemens Aktiengesellschaft | Contactless chip card |
US5708419A (en) | 1996-07-22 | 1998-01-13 | Checkpoint Systems, Inc. | Method of wire bonding an integrated circuit to an ultraflexible substrate |
WO1998006075A1 (fr) | 1996-08-06 | 1998-02-12 | Meto International Gmbh | Element antivol electronique |
DE19753619A1 (de) | 1997-10-29 | 1999-05-06 | Meto International Gmbh | Identifizierungselement und Verfahren zu seiner Herstellung |
IL119943A (en) | 1996-12-31 | 2000-11-21 | On Track Innovations Ltd | Contact/contactless data transaction card |
JP3823406B2 (ja) * | 1997-01-07 | 2006-09-20 | 松下電器産業株式会社 | 積層フィルタとこれを用いた携帯電話機 |
DE19719434A1 (de) | 1997-05-12 | 1998-11-19 | Meto International Gmbh | Universelles Sicherungselement und Verfahren zu seiner Herstellung |
JPH11346114A (ja) * | 1997-06-11 | 1999-12-14 | Matsushita Electric Ind Co Ltd | アンテナ装置 |
DE69831592T2 (de) | 1997-11-14 | 2006-06-22 | Toppan Printing Co. Ltd. | Zusammengesetzte ic-karte |
IL122841A0 (en) | 1997-12-31 | 1998-08-16 | On Track Innovations Ltd | Smart card for effecting data transfer using multiple protocols |
FR2777141B1 (fr) | 1998-04-06 | 2000-06-09 | Gemplus Card Int | Transpondeur |
US6154137A (en) | 1998-06-08 | 2000-11-28 | 3M Innovative Properties Company | Identification tag with enhanced security |
JP2000067194A (ja) * | 1998-08-25 | 2000-03-03 | Sony Corp | 記憶装置 |
DE19905886A1 (de) | 1999-02-11 | 2000-08-17 | Meto International Gmbh | Identifizierungselement und Verfahren zur Herstellung eines Identifizierungselements |
JP3632894B2 (ja) * | 1999-03-15 | 2005-03-23 | ソニー株式会社 | アンテナ装置及びカード状記憶媒体 |
DE19951561A1 (de) | 1999-10-27 | 2001-05-03 | Meto International Gmbh | Sicherungselement für die elektronischen Artikelsicherung |
JP4186149B2 (ja) * | 1999-12-06 | 2008-11-26 | 株式会社エフ・イー・シー | Icカード用の補助アンテナ |
US6522308B1 (en) * | 2000-01-03 | 2003-02-18 | Ask S.A. | Variable capacitance coupling antenna |
FI113809B (fi) | 2000-11-01 | 2004-06-15 | Rafsec Oy | Menetelmä älytarran valmistamiseksi sekä älytarra |
NO313976B1 (no) * | 2000-11-06 | 2003-01-06 | Helge Idar Karlsen | Anordning ved antenne |
JP2002183689A (ja) * | 2000-12-11 | 2002-06-28 | Dainippon Printing Co Ltd | 非接触データキャリア装置とその製造方法 |
US6407669B1 (en) * | 2001-02-02 | 2002-06-18 | 3M Innovative Properties Company | RFID tag device and method of manufacturing |
FR2823888B1 (fr) | 2001-04-24 | 2005-02-18 | Gemplus Card Int | Procede de fabrication d'une carte sans contact ou hybride et carte obtenue |
US6693541B2 (en) * | 2001-07-19 | 2004-02-17 | 3M Innovative Properties Co | RFID tag with bridge circuit assembly and methods of use |
JP4196554B2 (ja) * | 2001-09-28 | 2008-12-17 | 三菱マテリアル株式会社 | タグ用アンテナコイル及びそれを用いたrfid用タグ |
US7119693B1 (en) | 2002-03-13 | 2006-10-10 | Celis Semiconductor Corp. | Integrated circuit with enhanced coupling |
FR2840431B1 (fr) | 2002-05-29 | 2004-09-03 | Francois Trantoul | Procede et dispositif de protection d'inscriptions a lire |
JP4063040B2 (ja) * | 2002-10-22 | 2008-03-19 | ソニー株式会社 | Icモジュール並びにicモジュール用アンテナ |
JP2004227046A (ja) | 2003-01-20 | 2004-08-12 | Hitachi Ltd | 携帯情報機器 |
US6970141B2 (en) * | 2003-07-02 | 2005-11-29 | Sensormatic Electronics Corporation | Phase compensated field-cancelling nested loop antenna |
JP4244169B2 (ja) * | 2003-08-04 | 2009-03-25 | 日本発條株式会社 | 非接触情報媒体およびこれを用いた通信システム |
US20060044769A1 (en) | 2004-09-01 | 2006-03-02 | Forster Ian J | RFID device with magnetic coupling |
US7812729B2 (en) * | 2004-11-15 | 2010-10-12 | Sensormatic Electronics, LLC | Combination EAS and RFID label or tag with controllable read range using a hybrid RFID antenna |
WO2006078707A2 (fr) | 2005-01-19 | 2006-07-27 | Tosoh Smd Etna, Llc | Automated sputtering target production and sub systems thereof |
FR2886466B1 (fr) | 2005-05-25 | 2012-06-15 | Oberthur Card Syst Sa | Entite electronique a antenne magnetique |
FR2887665B1 (fr) | 2005-06-27 | 2007-10-12 | Oberthur Card Syst Sa | Entite electronique a antenne magnetique |
FR2893162B1 (fr) | 2005-11-08 | 2008-02-15 | Oberthur Card Syst Sa | Carte a microcircuit comportant un condensateur avantageusement interdigital |
JP2007166379A (ja) * | 2005-12-15 | 2007-06-28 | Fujitsu Ltd | ループアンテナ及びこのループアンテナを備えた電子機器 |
IL175824A0 (en) | 2006-05-22 | 2007-09-20 | On Track Innovations Ltd | Data transaction card having a tunable coil antenna with reduced footprint |
FR2904453B1 (fr) | 2006-07-25 | 2009-01-16 | Oberthur Card Syst Sa | Antenne electronique a microcircuit. |
KR100822240B1 (ko) * | 2006-08-07 | 2008-04-17 | 전자부품연구원 | Rfid 태그 |
FR2910152B1 (fr) | 2006-12-19 | 2009-04-03 | Oberthur Card Syst Sa | Antenne avec pont sans via pour entite electronique portable |
JP4452782B2 (ja) | 2006-12-20 | 2010-04-21 | 仁川大學校産學協力團 | Rfidリーダ用多重ループアンテナ、これを有するrfidリーダ、及びこれを有するrfidシステム |
US7675365B2 (en) | 2007-01-10 | 2010-03-09 | Samsung Electro-Mechanics | Systems and methods for power amplifiers with voltage boosting multi-primary transformers |
EP1970840A1 (fr) | 2007-03-15 | 2008-09-17 | Magnex Corporation | Etiquette RFID avec plage améliorée |
GB0705635D0 (en) | 2007-03-23 | 2007-05-02 | Innovision Res & Tech Plc | Near field RF communicators |
FR2914458B1 (fr) | 2007-03-28 | 2009-06-26 | Inside Contactless Sa | Procede de couplage d'un circuit integre sans contact a un composant nfc. |
FR2915011B1 (fr) | 2007-03-29 | 2009-06-05 | Smart Packaging Solutions Sps | Carte a puce a double interface de communication |
MX2009011053A (es) * | 2007-04-18 | 2009-10-29 | 3M Innovative Properties Co | Funcionalidad de identificacion de radiofrecuencia acoplada a señalizacion electricamente conductora. |
JP5020161B2 (ja) * | 2008-05-16 | 2012-09-05 | 三菱電機株式会社 | 無線通信装置 |
TW201019628A (en) | 2008-08-15 | 2010-05-16 | Ivi Smart Technologies Inc | RF power conversion circuits & methods, both for use in mobile devices |
US8201748B2 (en) * | 2009-04-27 | 2012-06-19 | Impinj, Inc. | Packaged RFID IC with integrated antenna |
-
2008
- 2008-12-11 WO PCT/FR2008/052281 patent/WO2010066955A1/fr active Application Filing
-
2009
- 2009-06-08 FR FR0953791A patent/FR2939936B1/fr not_active Expired - Fee Related
- 2009-12-09 US US13/133,640 patent/US8749390B2/en active Active
- 2009-12-09 CA CA2746241A patent/CA2746241C/fr not_active Expired - Fee Related
- 2009-12-09 WO PCT/EP2009/066749 patent/WO2010066799A2/fr active Application Filing
- 2009-12-09 KR KR1020117015716A patent/KR101634837B1/ko active IP Right Grant
- 2009-12-09 BR BRPI0922402A patent/BRPI0922402A2/pt not_active IP Right Cessation
- 2009-12-09 JP JP2011540081A patent/JP5592895B2/ja not_active Expired - Fee Related
- 2009-12-09 CN CN200980154658.5A patent/CN102282723B/zh not_active Expired - Fee Related
- 2009-12-09 SG SG2011042579A patent/SG172085A1/en unknown
- 2009-12-09 EP EP09805691A patent/EP2377200B1/fr active Active
- 2009-12-11 TW TW098142430A patent/TWI524587B/zh not_active IP Right Cessation
-
2011
- 2011-06-09 IL IL213449A patent/IL213449A/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3823403A (en) | 1971-06-09 | 1974-07-09 | Univ Ohio State Res Found | Multiturn loop antenna |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2963140A1 (fr) * | 2010-07-20 | 2012-01-27 | Oberthur Technologies | Dispositif a microcircuit de type sans contact |
CN102412871A (zh) * | 2010-09-21 | 2012-04-11 | 英赛瑟库尔公司 | 对涡电流敏感的nfc卡 |
CN102412871B (zh) * | 2010-09-21 | 2015-08-05 | 英赛瑟库尔公司 | 对涡电流敏感的nfc卡 |
WO2012052631A2 (fr) | 2010-10-19 | 2012-04-26 | Inside Secure | Appareil comportant des moyens de communication par couplage inductif |
KR101273184B1 (ko) | 2011-08-02 | 2013-06-17 | 엘지이노텍 주식회사 | 안테나 및 이를 위한 이동 단말기 |
US8749440B2 (en) | 2011-08-02 | 2014-06-10 | Lg Innotek Co., Ltd. | Antenna and mobile terminal including the same |
Also Published As
Publication number | Publication date |
---|---|
FR2939936B1 (fr) | 2018-11-23 |
IL213449A (en) | 2015-08-31 |
US20110266883A1 (en) | 2011-11-03 |
EP2377200B1 (fr) | 2012-10-31 |
JP5592895B2 (ja) | 2014-09-17 |
CN102282723B (zh) | 2014-09-24 |
CA2746241A1 (fr) | 2010-06-17 |
WO2010066955A1 (fr) | 2010-06-17 |
TWI524587B (zh) | 2016-03-01 |
CN102282723A (zh) | 2011-12-14 |
WO2010066799A3 (fr) | 2010-08-19 |
US8749390B2 (en) | 2014-06-10 |
KR101634837B1 (ko) | 2016-06-29 |
SG172085A1 (en) | 2011-07-28 |
IL213449A0 (en) | 2011-07-31 |
BRPI0922402A2 (pt) | 2017-07-11 |
EP2377200A2 (fr) | 2011-10-19 |
TW201101579A (en) | 2011-01-01 |
KR20110099722A (ko) | 2011-09-08 |
JP2012511850A (ja) | 2012-05-24 |
FR2939936A1 (fr) | 2010-06-18 |
CA2746241C (fr) | 2018-01-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2746241C (fr) | Circuit d'antenne rfid | |
EP2710523B1 (fr) | Dispositif transpondeur radiofrequence a circuit resonant passif optimise | |
FR2886466A1 (fr) | Entite electronique a antenne magnetique | |
EP1883996A2 (fr) | Entite electronique a antenne magnetique | |
FR2887665A1 (fr) | Entite electronique a antenne magnetique | |
EP2618496B1 (fr) | Circuit d'antenne pour dispositif NFC | |
WO2016188920A1 (fr) | Circuit d'antenne radiofrequence a mutuelles inductances imbriquees | |
WO2009059997A1 (fr) | Antenne inductive large bande pour systemes de communication sans contact | |
CA3006642A1 (fr) | Dispositif radiofrequence a circuit lc ajustable comprenant un module electrique et/ou electronique | |
EP3427189B1 (fr) | Carte à puce sans contact à contrôle digital | |
FR3081243A1 (fr) | Passeport electronique securise contre les lectures non autorisees | |
FR3036541A1 (fr) | Antenne a circuits rlc entremeles | |
WO2017191373A1 (fr) | Module électronique de taille réduite pour carte à puce | |
EP2471030B1 (fr) | Dispositif a antenne relais, dispositif radiofrequence associe et procede de realisation | |
EP4287069A1 (fr) | Paire de transpondeurs en résonance | |
FR2784524A1 (fr) | Antenne perfectionnee, notamment pour un lecteur de badge sans contact | |
CH719752A2 (fr) | Paire de transpondeurs en résonance et dispositif électronique, notamment une pièce d'horlogerie, comportant une telle paire de transpondeurs. | |
WO2016139394A1 (fr) | Composant microélectronique pour carte à puce à fonctionnement sans contact |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980154658.5 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09805691 Country of ref document: EP Kind code of ref document: A2 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2746241 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 4374/DELNP/2011 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011540081 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009805691 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 20117015716 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13133640 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: PI0922402 Country of ref document: BR Kind code of ref document: A2 Effective date: 20110613 |