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公开(公告)号：US20220170799A1
公开(公告)日：2022-06-02
申请号：US17441109
申请日：2020-03-19
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Julien Garcia
Abstract: An interrogation device for interrogating an acoustic wave sensor device comprises a transmission antenna; a reception antenna; and a processor configured for determining in-phase components I and quadrature components Q of a response signal received from the sensor in N consecutive frames of the response signal; determining moduli |Y| of the in-phase components I and quadrature components Q; determining a first norm M based on the moduli |Y|; determining a first weighting function W based on the first norm M and the moduli |Y|; determining in-phase components I and quadrature components Q of an N+1th frame of the response signal; determining moduli |Y| of in-phase components I and quadrature components Q of the N+1th frame; and applying the first weighting function W to the determined moduli |Y| of the response signal in the N+1th frame to obtain weighted moduli |Y|w of the response signal for the N+1th frame.
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公开(公告)号：US20210034935A1
公开(公告)日：2021-02-04
申请号：US16980324
申请日：2019-03-14
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Thierry LaRoche
IPC: G06K19/067 , H03H9/02
Abstract: A surface acoustic wave tag device is disclosed, comprising: an acoustic wave propagating substrate, at least one transducer structure comprising inter-digitated comb electrodes, and at least one reflecting means, the reflecting means comprising at least one reflector, wherein the acoustic wave propagation substrate is a composite substrate comprising a base substrate and a piezoelectric layer, wherein the crystallographic orientation of the piezoelectric layer with respect to the base substrate is such that the propagation of a shear wave inside the piezoelectric layer and in the direction of propagation corresponding to the acoustic wave is enabled. A physical quantity determining device and a fabrication method of such surface acoustic wave tag device are also disclosed.
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公开(公告)号：US11848663B2
公开(公告)日：2023-12-19
申请号：US17263880
申请日：2019-07-25
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Thierry LaRoche
CPC classification number: H03H9/6483 , H03H9/02669 , H03H9/02724 , H03H9/02771 , H03H9/02905 , H03H9/6489
Abstract: A coupled cavity filter structure that uses a surface acoustic wave, in particular, a guided surface acoustic wave, comprises an acoustic wave propagating substrate, at least one input transducer structure and one output transducer structure, provided over the substrate, each comprising inter-digitated comb electrodes, at least one reflecting structure comprising at least one or more metallic strips positioned at a distance and in between the input and output transducer structures, in the direction of propagation of an acoustic wave. The acoustic wave propagating substrate is a composite substrate comprising a base substrate and a piezoelectric layer. In additional embodiments, a coupled cavity filter structure comprises a groove. In additional embodiments, a SAW ladder filter device comprises at least two coupled cavity filter structures as described herein, wherein the at least two coupled cavity filter structures are positioned on a single line.
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公开(公告)号：US20230361751A1
公开(公告)日：2023-11-09
申请号：US18042948
申请日：2021-03-03
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Thierry LaRoche , Julien Garcia , Emilie Courjon , Florent Bernard
CPC classification number: H03H9/02551 , H03H9/25 , H03H9/02574
Abstract: An acoustic wave sensor device comprises a quartz material layer comprising a planar surface, a first interdigitated transducer formed over the planar surface of the quartz material layer, a first reflection structure formed over the planar surface of the quartz material layer, a second reflection structure formed over the planar surface of the quartz material layer, a first resonance cavity formed between the first interdigitated transducer and the first reflection structure and a second resonance cavity formed between the first interdigitated transducer and the second reflection structure. The planar surface of the quartz material layer is defined by a crystal cut of a quartz material of the quartz material layer with angles φ in the range of −14° to −24°, θ in the range of −25° to −45° and ψ in the range of +8° to +28°.
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公开(公告)号：US20230308074A1
公开(公告)日：2023-09-28
申请号：US18247629
申请日：2021-09-29
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Emilie Courjon , Florent Bernard , Thierry LaRoche , Julien Garcia , Alexandre Clairet
IPC: H03H9/02
CPC classification number: H03H9/02574 , H03H9/02559 , H03H9/0259 , H03H9/14538
Abstract: A surface acoustic wave (SAW) device comprises an interdigitated transducer structure and at least one acoustic wave reflective structure provided on or in an acoustic wave propagating substrate. The interdigitated transducer structure comprises a first material and the at least one acoustic wave reflective structure comprises a second material different from the first material and/or the acoustic wave reflective structure and the interdigitated transducer structure have different geometrical parameters. A sensor comprises a SAW device as described herein, and a method is used for manufacturing a SAW device comprising at least one acoustic wave reflective structure.
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Patent Agency Ranking
公开(公告)号：US20210028760A1
公开(公告)日：2021-01-28
申请号：US17042768
申请日：2019-03-20
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Florent Bernard , Emilie Courjon
Abstract: A surface acoustic wave device using a longitudinally polarized guided wave comprises a composite substrate comprising a piezoelectric layer formed over a base substrate, wherein the crystalline orientation of the piezoelectric layer with respect to the base substrate is such that, the phase velocity of the longitudinally polarized wave is below the critical phase velocity of the base substrate at which wave guiding within the piezoelectric layer vanishes. A method of fabrication of such surface acoustic wave device is also disclosed.
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公开(公告)号：US20240159710A1
公开(公告)日：2024-05-16
申请号：US18548847
申请日：2022-03-03
Applicant: FREC'N'SYS
Inventor： Sylvain BALLANDRAS , Thierry LAROCHE , Julien GARCIA , Emilie COURJON
CPC classification number: G01N29/022 , H03H9/14502 , H03H9/25 , G01N2291/0422
Abstract: An acoustic wave sensor device comprises a first interdigitated transducer, a first reflection structure, a second reflection structure, a first resonance cavity comprising a first upper surface and formed between the first interdigitated transducer and the first reflection structure, and a second resonance cavity comprising a second upper surface and formed between the first interdigitated transducer and the second reflection structure. At least one of the first and second upper surfaces is covered at least partly by a metalization layer or a passivation layer. The present invention relates also to an acoustic wave sensor assembly.
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公开(公告)号：US11894830B2
公开(公告)日：2024-02-06
申请号：US17418824
申请日：2019-12-27
Applicant: THALES , CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE , FREC'N'SYS , YNCREA HAUTS DE France ISEN LILLE , UNIVERSITE DE LILLE , ECOLE CENTRALE DE LILLE , UNIVERSITE POLYTECHNIQUE HAUTS-DE-FRANCE
Inventor： Thi Mai Pham Colomban , Claude Prévot , Paolo Martins , Anne-Christine Hladky-Hennion , Bertrand Dubus , Marianne Sagnard , Thierry Laroche , Sylvain Ballandras , Charles Croenne
CPC classification number: H03H9/14502 , H03H9/02637 , H03H9/02992 , H03H9/64
Abstract: A surface acoustic wave device includes at least one transducer; two acoustic reflectors disposed on either side of the at least one transducer so as to form a cavity, each acoustic reflector comprising an array of electrodes in the form of lines parallel with each other, each array comprising a subset of electrodes connected to a reference potential denoted mass defining a first connection type, and a subset of electrodes that are not connected to any potential, i.e. that have a floating connection defining a second connection type; at least one switching circuit configured to modify the distribution of the connections of at least one part of the electrodes of each array between the different connection types.
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公开(公告)号：US20220326102A1
公开(公告)日：2022-10-13
申请号：US17753510
申请日：2020-09-04
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Emilie Courjon , Florent Bernard , Thierry LaRoche , Julien Garcia
Abstract: An acoustic wave pressure sensor device configured to measure a pressure, comprising a substrate configured to bend when pressure is applied to the substrate such that an area of a first kind of strain and an area of a second kind of strain are formed in the substrate; an interdigitated transducer formed over the substrate; a first Bragg mirror formed over the substrate and arranged on one side of the interdigitated transducer; a second Bragg mirror formed over the substrate and arranged on another side of the interdigitated transducer; a first resonance cavity formed between the interdigitated transducer and the first Bragg mirror; a second resonance cavity formed between the interdigitated transducer and the second Bragg mirror; and wherein the first resonance cavity is formed over the area of the first kind of strain and the second resonance cavity is formed over the area of the second kind of strain.
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公开(公告)号：US20210265980A1
公开(公告)日：2021-08-26
申请号：US17263880
申请日：2019-07-25
Applicant: FREC'N'SYS
Inventor： Sylvain Ballandras , Thierry LaRoche
Abstract: A coupled cavity filter structure that uses a surface acoustic wave, in particular, a guided surface acoustic wave, comprises an acoustic wave propagating substrate, at least one input transducer structure and one output transducer structure, provided over the substrate, each comprising inter-digitated comb electrodes, at least one reflecting structure comprising at least one or more metallic strips, positioned at a distance and in between the input and output transducer structures, in the direction of propagation of an acoustic wave. The acoustic wave propagating substrate is a composite substrate comprising a base substrate and a piezoelectric layer. In additional embodiments, a coupled cavity filter structure comprises a groove. In additional embodiments, a SAW ladder filter device comprises at least two coupled cavity filter structures as described herein, wherein the at least two coupled cavity filter structures are positioned on a single line.
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