公开(公告)号：US11316498B2

公开(公告)日：2022-04-26

申请号：US16323216

申请日：2017-08-04

Applicant: SNAPTRACK, INC.

Inventor： Edgar Schmidhammer

IPC: H03H9/54 ,  H03H9/64 ,  H03H9/56 ,  H03H9/60 ,  H03H7/12 ,  H03H7/46

Abstract: A reconfigurable microacoustic filter is specified which comprises a ladder-type-like filter topology and a suitably placed adjustable capacitive element.

公开(公告)号：US10079586B2

公开(公告)日：2018-09-18

申请号：US15118853

申请日：2014-06-10

Applicant: SNAPTRACK, INC.

Inventor： Juha Ellä ,  Edgar Schmidhammer ,  Christian Block

IPC: H03H7/01 ,  H03H9/46 ,  H03H7/46

CPC classification number: H03H7/0153 ,  H01P1/20327 ,  H01P1/20345 ,  H03H7/0115 ,  H03H7/1708 ,  H03H7/1775 ,  H03H7/463 ,  H03H9/465 ,  H03H2210/025 ,  H03H2210/026

Abstract: A package for a tunable filter is disclosed. In an embodiment, the tunable filter includes a substrate having a first interconnection plane and a semiconductor device assembled on the substrate in a first component plane, the semiconductor device electrically connected to the first interconnection plane and containing tunable passive components. The filter further includes a control unit arranged in the first component plane, a dielectric layer arranged above the first component plane, a second component plane arranged on the dielectric layer and discrete passive devices arranged in the second component plane and interconnected with the semiconductor device, wherein the tunable passive components are tunable by the control unit.

公开(公告)号：US09673779B2

公开(公告)日：2017-06-06

申请号：US14979287

申请日：2015-12-22

Applicant: Snaptrack Inc.

Inventor： Werner Ruile ,  Markus Mayer ,  Ulrike Rösler ,  Markus Hauser ,  Ingo Bleyl ,  Karl-Christian Wagner ,  Wolfgang Sauer ,  Michael Jakob ,  Thomas Ebner ,  Edgar Schmidhammer ,  Stefan Berek ,  Christoph Eggs

IPC: H03H9/02 ,  H03H9/25 ,  H03H3/08 ,  H03H9/145

CPC classification number: H03H9/25 ,  H03H3/08 ,  H03H9/02535 ,  H03H9/02858 ,  H03H9/14532 ,  H03H9/1455 ,  H03H9/1457 ,  Y10T29/42

Abstract: An electroacoustic transducer has reduced loss due to acoustic waves emitted in the transverse direction. For this purpose, a transducer comprises a central excitation area, inner edge areas flanking the central excitation area, outer edge areas flanking the inner edge areas, and areas of the busbar flanking the outer edge areas. The longitudinal speed of the areas can be set so that the excitation profile of a piston mode is obtained.

公开(公告)号：US11095268B2

公开(公告)日：2021-08-17

申请号：US15316145

申请日：2015-08-11

Applicant: Snaptrack Inc.

Inventor： Edgar Schmidhammer

IPC: H03H9/64 ,  H03H9/60 ,  H03H9/54 ,  H03H9/56 ,  H03H7/38 ,  H03H9/72 ,  H03H9/02 ,  H03H9/70

Abstract: An RF filter is disclosed. In an embodiment, the RF filter includes series-interconnected basic elements, each basic element having an electroacoustic resonator and impedance converters interconnected in series between the basic elements, wherein the impedance converters are impedance inverters and/or admittance inverters, and wherein the resonators of the basic elements are either only series resonators or only parallel resonators.

公开(公告)号：US10164665B2

公开(公告)日：2018-12-25

申请号：US15571784

申请日：2016-04-27

Applicant: SNAPTRACK, INC.

Inventor： Juha Ellä ,  Edgar Schmidhammer

IPC: H04B1/40 ,  H04B1/00 ,  H04B1/18 ,  H04L5/00 ,  H04B1/04

Abstract: An HF circuit is specified, by means of which carrier aggregation is possible with a simple design. The circuit comprises a duplexer, a further filter, and two phase shifters, and can be used in an HF module of a mobile wireless device.

公开(公告)号：US09948327B2

公开(公告)日：2018-04-17

申请号：US15102858

申请日：2013-12-11

Applicant: Snaptrack Inc.

Inventor： Juha Ellae ,  Edgar Schmidhammer

IPC: H04L5/00 ,  H04B1/00 ,  H04B1/52 ,  H04L5/14

CPC classification number: H04B1/0057 ,  H04B1/52 ,  H04L5/14

Abstract: The present invention concerns a front end circuit (1) which comprising a first tunable duplexer (5) comprising a first tunable RX bandpass filter (9) and a first tunable TX bandpass filter (10), wherein the first tunable duplexer (5) is configured to support a first FDD mode in a first FDD frequency band and a first TDD mode in a first TDD frequency band. Furthermore, the present invention concerns a method of operating the front end circuit.

公开(公告)号：US09866266B2

公开(公告)日：2018-01-09

申请号：US15120082

申请日：2014-06-06

Applicant: Snaptrack Inc.

Inventor： Juha Ellä ,  Edgar Schmidhammer

IPC: H04B1/40 ,  H04B1/48 ,  H04B1/00 ,  H03H7/01 ,  H03H7/46

CPC classification number: H04B1/48 ,  H03H7/1708 ,  H03H7/1775 ,  H03H7/465 ,  H03H2210/025 ,  H04B1/0064

Abstract: A front-end circuit with a tunable filter is disclosed. In an embodiment, the front end circuit includes a first signal path connected to an antenna connection, a first filter arranged in the first signal path, wherein the first filter is tunable within a first frequency range, and an extra signal path and a first fixed filter arranged therein, wherein the first fixed filter has a passband for an extra frequency band, wherein the first fixed filter is not tunable, and wherein the extra frequency band is arranged outside or inside the first frequency range. The front end circuit further includes a narrowband antenna tuner configured to be set to a respective tunable frequency range, wherein the narrowband antenna tuner is arranged between the first filter, the first fixed filter and the antenna connection in the first and second signal paths.

公开(公告)号：US10476478B2

公开(公告)日：2019-11-12

申请号：US15315354

申请日：2015-07-20

Applicant: SNAPTRACK, INC.

Inventor： Edgar Schmidhammer

IPC: H03H9/54 ,  H03H9/56 ,  H03H9/60 ,  H03H9/64 ,  H03H9/00 ,  H03H9/205 ,  H03H9/70 ,  H03H9/72 ,  H03H9/02

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.

公开(公告)号：US10911022B2

公开(公告)日：2021-02-02

申请号：US15315368

申请日：2015-07-06

Applicant: Snaptrack Inc.

Inventor： Edgar Schmidhammer

IPC: H03H9/54 ,  H03H9/64 ,  H03H9/70 ,  H03H9/72 ,  H01P5/16 ,  H03H7/18 ,  H03H11/28 ,  H04L5/14

Abstract: A duplexer is disclosed. In an embodiment, the duplexer includes a Tx filter and an Rx filter, wherein the Tx filter includes first series-interconnected basic elements, each first basic element having a first electroacoustic resonator and first impedance converters interconnected in series between the first basic elements, wherein the Rx filter comprises second series-interconnected basic elements, each second basic element having a second electroacoustic resonator and second impedance converters interconnected in series between the second basic elements, wherein the first impedance converters in the Tx filter are impedance inverters, wherein the first resonators of the first basic elements in the Tx filter are only series resonators, wherein the second impedance converters in the Rx filter are admittance inverters, and wherein the second resonators of the second basic elements in the Rx filter are only parallel resonators.

公开(公告)号：US10277259B2

公开(公告)日：2019-04-30

申请号：US15119476

申请日：2014-06-03

Applicant: Snaptrack Inc.

Inventor： Juha Ellá ,  Edgar Schmidhammer

IPC: H04B1/00 ,  H03H7/46 ,  H04L5/14 ,  H03H7/01

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.