Patents Assigned to SnapTrack, Inc.
  • Patent number: 10608612
    Abstract: In order to suppress an interference frequency in a ladder-type filter, an additional resonator (RZ1) that acts as a capacitance is connected in parallel to a series resonator (S1). The antiresonance of the additional resonator creates an additional pole in order for the interference frequency to be attenuated more effectively.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: March 31, 2020
    Assignee: SnapTrack, Inc.
    Inventor: Thomas Kauschke
  • Patent number: 10574207
    Abstract: An improved electroacoustic transducer with an improved mode profile is provided. The transducer comprises a transversal velocity profile with a periodic structure and an edge structure flanking the periodic structure. The velocity profile also allows to suppress the SH wave mode. A dielectric material with a periodic structure contributes to the formation of the periodic structure of the velocity profile.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: February 25, 2020
    Assignee: SnapTrack, Inc.
    Inventors: Jiman Yoon, Philipp Michael Jäger
  • Patent number: 10530415
    Abstract: The invention relates to an HF circuit, for example for use in front-end circuits, having improved signal quality in carrier aggregation. According to the invention, a signal path between a duplexer and a diplexer comprises a phase shifter.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: January 7, 2020
    Assignee: SnapTrack, Inc.
    Inventors: Juha Ellä, Edgar Schmidhammer, Gabriele Kolb, Ratko Jovovic
  • Patent number: 10523179
    Abstract: Example implementations of a bulk acoustic wave resonator with an optimized outer perimeter are disclosed. In an example aspect, a resonator includes a truncated-ellipsoid-shaped active region. The active region includes an outer electrode disposed as a first layer of the active region. The active layer also includes a piezoelectric layer disposed as a second layer of the active region with the piezoelectric layer disposed interior to the outer electrode. The active layer further includes an inner electrode disposed as a third layer of the active region with the inner electrode disposed interior to the piezoelectric layer.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: December 31, 2019
    Assignee: SnapTrack, Inc.
    Inventors: Oscar Menendez-Nadal, Thomas Bain Pollard, Brian Hal Fisher, Janardan Nath
  • Patent number: 10491185
    Abstract: In a filter arrangement comprising a frequency filter (F) that has a bad or non-ideal ground connection (GC1, 2, 3, 4, 5, 6, 7), the defects arising from bad ground are compensated by a capacitance (CC) coupled in parallel to the frequency filter. The value of the capacitance is chosen between 1 and 50 fF. The filter arrangement may be a receiving filter (RF) in a duplexer (DU).
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: November 26, 2019
    Assignee: SnapTrack, Inc.
    Inventor: Luigi Rosetti
  • Patent number: 10476478
    Abstract: The specification relates to an RF filter in which characteristic filter variables have a decreased dependency on tuning. A filter in this case comprises series-interconnected basic elements that each have an electroacoustic resonator and impedance converters interconnected in series between the basic elements.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: November 12, 2019
    Assignee: SnapTrack, Inc.
    Inventor: Edgar Schmidhammer
  • Patent number: 10461720
    Abstract: Techniques are disclosed for increasing capacitance, decreasing losses, and/or improving a quality factor of a SAW filter. The techniques include using a partial-IDT instead of a reflector between two groups of IDTs. The partial-IDT is implemented having a cavity transition on a first end and a reflector transition on a second end. The cavity transition facilitates propagation of main-resonance acoustic waves into, or between elements of, the partial-IDT. The reflector transition facilitates reflection of main-resonance acoustic waves.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: October 29, 2019
    Assignee: SnapTrack, Inc.
    Inventors: Ravi Kiran Challa, Akshaya Ishwarayya Hiremath, Attieh Shahvarpour
  • Patent number: 10340884
    Abstract: In an arrangement having a DMS filter, it is provided to symmetrically divide at least one of the transducers (W) of the DMS filter (DMS) into two sub-transducers (T,T?) electrically connected in parallel and to shift them apart from each other by an amount of at least a half wavelength. This results in the signals of the two sub-transducers canceling each other out at a frequency in a stopband and thereby generating an attenuation pole in the upper blocking region.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: July 2, 2019
    Assignee: SnapTrack, Inc.
    Inventor: Andreas Bergmann
  • Patent number: 10333488
    Abstract: An electroacoustic component is disclosed. In an embodiment, the electroacoustic component includes a piezoelectric substrate comprising a rare earth metal and calcium oxoborates (RE-COB) and component structures arranged on the substrate, the component structures being suitable for converting between RF signals and acoustic waves, wherein the waves are capable of propagation in a direction x??, and wherein the direction x?? is determined by Euler angles (?, ?, ?), the Euler angles being selected from angle ranges (20-90, 95-160, 15-55), (20-85, 95-160, 95-125) and (15-25, 85-100, 0-175).
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: June 25, 2019
    Assignee: SnapTrack, Inc.
    Inventors: Philipp Michael Jäger, Ulrike Rösler
  • Publication number: 20190190495
    Abstract: A reconfigurable microacoustic filter is specified which comprises a ladder-type-like filter topology and a suitably placed adjustable capacitive element.
    Type: Application
    Filed: August 4, 2017
    Publication date: June 20, 2019
    Applicants: SNAPTRACK, INC., SNAPTRACK, INC.
    Inventor: Edgar SCHMIDHAMMER
  • Patent number: 10326428
    Abstract: The invention specifies a tunable RF filter which may operate using electroacoustic components and provides good electrical properties despite having a wide tuning range. For this purpose, the RF filter comprises a tunable filter core (AFK) having electroacoustic (EAK) and detunable (AKE) filter elements, and impedance restoration circuits (IWS1, IWS2) for compensating for an impedance change by tuning the filter core.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: June 18, 2019
    Assignee: SnapTrack, Inc.
    Inventors: Juha Ellä, Edgar Schmidhammer
  • Publication number: 20190164892
    Abstract: The present invention relates to a module that has a lower component of a module (1) having a material (3) in which at least one first structural element (4) is embedded, and an upper component of a module (2) having a material (3) in which at least a second component (16) is embedded. The upper component of the module (2) and the lower component of the module (1) are stacked, with the lower and the upper component of the module (2) being electrically connected and mechanically linked to each other. In addition, the present invention relates to a simple and cost-effective process for the production of a variety of modules. The invention makes it possible for the modules to be miniaturized with respect to surface and height and/or makes it possible to achieve greater integration by 3D packaging.
    Type: Application
    Filed: December 2, 2016
    Publication date: May 30, 2019
    Applicant: SNAPTRACK, INC.
    Inventors: Andreas FRANZ, Jürgen PORTMANN, Claus REITLINGER, Stefan KIEFL, Oliver FREUDENBERG, Karl WEIDNER
  • Patent number: 10298202
    Abstract: The invention relates to a BAW resonator with reduced heat build-up. The heat build-up is reduced by a thermal bridge, which dissipates heat from the electro-acoustically active region to a support substrate, without impairing the acoustics of the resonator.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: May 21, 2019
    Assignee: SnapTrack, Inc.
    Inventors: Andreas Tag, Bernhard Bader, Maximilian Pitschi
  • Patent number: 10298207
    Abstract: For a reactance filter constructed from serial and parallel resonators, in order to improve the linearity, it is proposed to connect a capacitor in series or in parallel either with a parallel resonator or a cascade of parallel resonators or with a series resonator or a cascade of series resonators.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: May 21, 2019
    Assignee: SnapTrack, Inc.
    Inventor: Stefan Freisleben
  • Patent number: 10277195
    Abstract: An electro-acoustic transducer and an electro-acoustic component including an electro-acoustic transducer are disclosed. In an embodiment the transducer includes a first and a second bus bar, a plurality of electrode fingers and a plurality of two or more sub tracks, wherein each electrode finger is electrically connected to one of the bus bars, wherein each sub track extends along a longitudinal direction, wherein all sub tracks are arranged one next to another in a transversal direction, wherein at least a first of the sub tracks includes segments of the electrode fingers and has an associated sub track with segments of the electrode fingers, wherein the segments of the electrode fingers of the first sub track are shifted by a distance S=?/2 along the longitudinal direction relative to the segments of the electrode fingers of the associated sub track, and wherein ? is an acoustic wavelength.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: April 30, 2019
    Assignee: SnapTrack, Inc.
    Inventors: Xian Yi Li, Stéphane Chamaly, Sok Fong Koh
  • Patent number: 10277259
    Abstract: A front end circuit is disclosed. In an embodiment, the circuit includes a first antenna connection and first to third signal paths, each of which include a tunable filter and each of which is connected to the first antenna connection. The circuit further includes at least one phase shifter arranged in at least one of the signal paths between a respective filter and the first antenna connection and a control circuit configured to tune frequency bands of the filters, wherein the filters are operable in a FDD operating mode or a TDD operating mode, and wherein the front-end circuit is simultaneous operable in at least one transmission band and at least one reception band using all three filters and the associated signal paths.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: April 30, 2019
    Assignee: SnapTrack, Inc.
    Inventors: Juha Ellá, Edgar Schmidhammer
  • Patent number: 10270582
    Abstract: A duplexer and a quadplexer are disclosed. In an embodiment, the duplexer includes an antenna terminal and two sub-paths including a transmit path and a receive path, the two sub-paths being connected to the antenna terminal, wherein the transmit path includes serially interconnected series resonators and, in parallel therewith, n parallel paths connected to ground, wherein each parallel path includes one parallel resonator or a cascade of serially interconnected parallel resonators, wherein n is an integral number with 0<n<8, wherein at least one of the n parallel resonators is connected to ground in series with an inductance in the transmit path, and wherein a parallel resonator is connected directly to ground in a first parallel path that is nearest to the antenna terminal and no inductance is arranged in the first parallel path.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: April 23, 2019
    Assignee: SnapTrack, Inc.
    Inventors: Juha Ellä, Edgar Schmidhammer
  • Publication number: 20190089335
    Abstract: The aim according to the invention is to suppress a disturbing SH mode in a ladder-type filter. This aim is achieved in that the resonance frequency of the series resonator responsible therefor is moved and, at the same time, the pole zero distance of the series resonator is reduced by parallel connection with a capacitor. The antiresonance of the series resonator and therefore also the passband thus remain unchanged.
    Type: Application
    Filed: September 20, 2016
    Publication date: March 21, 2019
    Applicant: SNAPTRACK, INC.
    Inventors: Wolfgang SAUER, Franz KUBAT
  • Patent number: 10236855
    Abstract: A tunable RF filter circuit (AHF) is specified which enables good electrical properties, good tunability and simple driving despite low complexity. In this case, the filter circuit comprises a first and a second signal route (SW1, SW2) in a signal path (E, A). At least three resonant circuits (RK1, RK2, RK3) are arranged one after another in the second signal route and interconnect the second signal route with ground. The resonant circuits are electrically and/or magnetically coupled (K) and each comprise a tunable impedance element. The second signal route contains an impedance element (IMP).
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: March 19, 2019
    Assignee: SnapTrack, Inc.
    Inventor: Edgar Schmidhammer
  • Patent number: 10224897
    Abstract: For a component operating with acoustic waves, it is proposed to provide a compensation layer on the component for compensating for a negative temperature coefficient of the frequency, which includes a material based on a chemical compound made up of at least two elements, which has a negative thermal expansion coefficient.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: March 5, 2019
    Assignee: SnapTrack, Inc.
    Inventors: Werner Ruile, Philipp Michael Jäger, Matthias Knapp