公开(公告)号：US20240313736A1

公开(公告)日：2024-09-19

申请号：US18387244

申请日：2023-11-06

Applicant: Qorvo US, Inc.

Inventor： Casey Kirkpatrick ,  Christian Huck

IPC: H03H9/02 ,  H03H3/08 ,  H03H9/64

CPC classification number: H03H9/02834 ,  H03H3/08 ,  H03H9/02551 ,  H03H9/02574 ,  H03H9/6453

Abstract: A surface acoustic wave (SAW) device is provided with a piezoelectric substrate, an interdigitated transducer (IDT), and multiple dielectric layers. The IDT is over a top surface of the piezoelectric substrate and comprises first and second electrodes with interdigitated fingers. A first higher k dielectric layer is provided over the IDT, and a first lower k dielectric layer is provided over the first higher k dielectric layer. The dielectric constant of the first higher k dielectric layer is higher than the dielectric constant of the first lower k dielectric layer.

公开(公告)号：US06441704B1

公开(公告)日：2002-08-27

申请号：US09668490

申请日：2000-09-25

Applicant: Markus Ali-Hackl ,  Stefan Freisleben ,  Thomas Johannes ,  Thomas Baier ,  Ulrich Bauernschmitt ,  Ulrike Rösler

Inventor： Markus Ali-Hackl ,  Stefan Freisleben ,  Thomas Johannes ,  Thomas Baier ,  Ulrich Bauernschmitt ,  Ulrike Rösler

IPC: H03H964

CPC classification number: H03H9/6479 ,  H03H9/0038 ,  H03H9/02716 ,  H03H9/02795 ,  H03H9/02874 ,  H03H9/14588 ,  H03H9/6453 ,  H03H9/6463

Abstract: A surface acoustic wave filter having compensated capacitive and inductive crosstalk between adjacent IDT input and output transducers includes electromagnetically coupled transducers split into partial transducers. The routing of the partial transducer pads is modified such that the flux directions of the magnetic couplings between the adjacent partial transducers are oppositely directed so that the total induced magnetic flux is zero. The partial transducers are connected in series or in parallel such that, in the case of symmetric operation, the crosstalk capacitances between adjacent pads and transducer surfaces are balanced at the corresponding port.

Abstract translation: 在相邻的IDT输入和输出换能器之间具有补偿的电容和电感串扰的表面声波滤波器包括分离成部分换能器的电磁耦合的换能器。 修改部分换能器垫的布线，使得相邻部分换能器之间的磁耦合的磁通方向相反地指向，使得总的感应磁通为零。 部分传感器串联或并联连接，使得在对称操作的情况下，相邻焊盘和传感器表面之间的串扰电容在对应的端口处平衡。

公开(公告)号：US20010040489A1

公开(公告)日：2001-11-15

申请号：US09725140

申请日：2000-11-29

Applicant: Fujitsu Limited

Inventor： Takashi Matsuda ,  Jun Tsutsumi ,  Osamu Ikata ,  Yoshio Satoh

IPC: H03H009/64

CPC classification number: H03H9/0285 ,  H03H9/02748 ,  H03H9/14547 ,  H03H9/14552 ,  H03H9/14564 ,  H03H9/6453 ,  H03H9/6476

Abstract: A surface acoustic wave filter includes a piezoelectric substrate, an exciting electrode formed on the piezoelectric substrate and exciting a surface acoustic wave, and a receiving electrode receiving the surface acoustic wave. Both the exciting and receiving electrodes are provided with interdigital electrode fingers having a period p. Either one of the exciting and receiving electrodes is constructed of a plurality of interdigital electrode sub-units having substantially the same electrode surface areas occupied by interdigital electrode fingers. The interdigital electrode sub-units are disposed in a direction perpendicular to a propagation direction of the excited surface acoustic wave and have a positional relation such that the interdigital electrode sub-units are offset to each other by (nnullnull)p, wherein n is an integer, in a direction parallel to the propagation direction of the surface acoustic wave.

Abstract translation: 表面声波滤波器包括压电基板，形成在压电基板上的激励电极和激励表面声波，以及接收声表面波的接收电极。 励磁接收电极和接收电极都设有具有周期p的叉指电极指。 激励电极和接收电极中的任一个由多个叉指电极子单元构成，其具有由交叉指状电极指指占据的基本相同的电极表面积。 叉指电极子单元配置在与激励声表面波的传播方向垂直的方向上，具有使指数间电极子单元彼此偏移（n±¼）p的位置关系，其中n 是平行于表面声波的传播方向的整数。

公开(公告)号：US20240275363A1

公开(公告)日：2024-08-15

申请号：US18426707

申请日：2024-01-30

Applicant: Skyworks Solutions, Inc.

Inventor： Kurt George Steiner ,  Alan Sangone Chen ,  Yosuke Hamaoka ,  Benjamin Paul Abbott

IPC: H03H9/70 ,  H03H9/02 ,  H03H9/05 ,  H03H9/64

CPC classification number: H03H9/706 ,  H03H9/02992 ,  H03H9/0576 ,  H03H9/6453

Abstract: Aspects and embodiments disclosed herein include an acoustic wave device comprising a substrate, a pair of inter-digital transducer (IDT) electrodes formed on the substrate, each of the pair of IDT electrodes including a bus bar and a plurality of fingers extending from the bus bar, fingers of one IDT electrode arranged interleaved with fingers of the other IDT electrode, each of the bus bars of the pair of IDT electrodes having a slotted portion configured on an upper surface of the bus bars opposite to a lower surface contacting the substrate such that at least one hollow within each of the bus bars is opened at least at the upper surface of each of the bus bars, and a dielectric film covering the pair of IDT electrodes, at least a portion of the dielectric film filling in the at least one hollow of each of the bus bars.

公开(公告)号：US12009805B2

公开(公告)日：2024-06-11

申请号：US17434362

申请日：2020-03-16

Applicant: RF360 SINGAPORE PTE. LTD

Inventor： Thomas Bauer ,  Ansgar Schäufele ,  Thomas Dengler

IPC: H03H9/64 ,  H03H9/02 ,  H03H9/145

CPC classification number: H03H9/6453 ,  H03H9/02637 ,  H03H9/02834 ,  H03H9/14541

Abstract: An improved DMS filter with electrode structures between a first port and a second port is provided. Wiring junctions are realized in multilayer crossing with dielectric material in between. There are insulating patches (L2) between crossing conductor layers (L1,L3). Signal wirings may be realized with multiple conductor layers (L1, L3) to reduce wiring resistance and the upper conductor layer (L3) of the signal wiring may partly overlap the insulating patches (L2). The insulating patches (L2) may extend over the acoustic path to achieve temperature compensation.

公开(公告)号：US6104260A

公开(公告)日：2000-08-15

申请号：US216941

申请日：1998-12-21

Applicant: Toru Yamada ,  Shigeru Tsuzuki ,  Hiroyuki Nakamura

Inventor： Toru Yamada ,  Shigeru Tsuzuki ,  Hiroyuki Nakamura

IPC: H03H9/00 ,  H03H9/02 ,  H03H9/145 ,  H03H9/64

CPC classification number: H03H9/6453 ,  H03H9/0042 ,  H03H9/6433 ,  H03H9/0285 ,  H03H9/14505 ,  H03H9/14526 ,  H03H9/643

Abstract: A surface acoustic wave filter. The filter includes two filter tracks which are parallel to each other. Each track has an input interdigital transducer, reflector and output interdigital transducer. This distance between the input transducer and output transducer is the same in both tracks. The distance between the output transducer and reflector is different in the two tracks. The electrical connection is in opposite phase in either the inputs or outputs, but not both. Electrode fingers are arranged in groups of two and have widths and spacings related to the wavelength.

Abstract translation: 表面声波滤波器。 滤波器包括彼此平行的两个滤波器轨道。 每个轨道都有一个输入叉指式换能器，反射器和输出叉指式换能器。 输入传感器和输出传感器之间的距离在两条轨道上相同。 输出传感器和反射器之间的距离在两条轨道上是不同的。 电气连接在输入或输出端都处于相反的阶段，但不能同时进行。 电极指状物被布置成两组，并且具有与波长相关的宽度和间隔。

公开(公告)号：US4609891A

公开(公告)日：1986-09-02

申请号：US788196

申请日：1985-10-16

Applicant: Leland P. Solie ,  Hans P. Fredricksen

Inventor： Leland P. Solie ,  Hans P. Fredricksen

IPC: H03H9/25 ,  H03H3/08 ,  H03H9/02 ,  H03H9/64

CPC classification number: H03H9/02685 ,  H03H9/6433 ,  H03H9/6453 ,  H03H9/6496

Abstract: A surface acoustical wave (SAW) filter is provided by placing at least one pair resonator channels consisting of reflectors and input and output transducers on the surface of a suitable substrate, such as a piezo-electric crystal. One channel of the pair consists of an input transducer and an output transducer which are aligned in a path along which the SAW progresses. The two channels are identical except that the separation distance between the transducers and the reflectors, in one channel is slightly different than the corresponding distance in the other channel. This separation difference serves to broaden the passband for applications which require a broader passband than is obtainable with a single channel resonator filter. Differential detection of the SAW in one section with respect to the other channel is achieved by using a symetrically inverted output transducer, in one embodiment. In another embodiment an offset transducer is used to accomplish the differential sensing.

Abstract translation: 通过将由反射器和输入和输出换能器组成的至少一对谐振器通道放置在诸如压电晶体的合适衬底的表面上来提供表面声波（SAW）滤波器。 该对中的一个通道包括输入换能器和输出换能器，其在SAW进入的路径中对准。 两个通道是相同的，除了在一个通道中的换能器和反射器之间的间隔距离稍微不同于另一个通道中的相应距离。 该分离差异用于扩展需要比单通道谐振滤波器可获得的通带宽的应用的通带。 在一个实施例中，通过使用对称反转的输出换能器来实现在一个部分中相对于另一个通道的SAW的差分检测。 在另一个实施例中，使用偏移换能器来完成微分感测。

公开(公告)号：US4296391A

公开(公告)日：1981-10-20

申请号：US954124

申请日：1978-10-24

Applicant: Katashi Hazama ,  Akitsuna Yuhara

Inventor： Katashi Hazama ,  Akitsuna Yuhara

IPC: H03H9/145 ,  H03H9/64 ,  H03H9/72 ,  H03J5/24 ,  H03H9/68

CPC classification number: H03H9/6413 ,  H03H9/1455 ,  H03H9/72 ,  H03J5/24 ,  H03H9/6436 ,  H03H9/6453

Abstract: A surface-acoustic-wave filter for a channel selection tuning system of a television receiver includes at least two comb filter elements, each of which comprises an input transducer provided on a piezoelectric substrate and adapted to convert an input electrical signal into an elastic surface wave, and first and second output transducers disposed on the substrate for receiving the elastic surface wave propagating in the same direction from the input transducer. The first and second output transducers are positioned from the input transducer with different distances. The transducers of the two comb filter elements are so designed that the respective comb filter elements respond to frequencies of different program channel bands over for example VHF and UHF bands. The distances of the first and the second output transducers from the input transducer in the wave propagating direction are so predetermined that reciprocal of the difference in delay time between the electrical signals derived from the first and second output transducers is equal to a divisor of an interchannel frequency difference in the corresponding channel band.

Abstract translation: 一种用于电视接收机的频道选择调谐系统的表面声波滤波器包括至少两个梳状滤波器元件，每个梳状滤波器元件包括设置在压电基片上的输入换能器，其适于将输入电信号转换成弹性表面波 以及设置在基板上的第一和第二输出换能器，用于接收从输入换能器沿相同方向传播的弹性表面波。 第一和第二输出换能器从不同距离的输入换能器定位。 两个梳状滤波器元件的换能器被设计成使得相应的梳状滤波器元件响应于例如VHF和UHF频带的不同节目频道频带的频率。 第一和第二输出换能器与输入换能器在波传播方向上的距离是如此预定的，即从第一和第二输出换能器得到的电信号之间的延迟时间差的倒数等于通道间的除数 相应频道频段的频差。

公开(公告)号：US20240097653A1

公开(公告)日：2024-03-21

申请号：US18368177

申请日：2023-09-14

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yasuhiro SHIMIZU ,  Sunao YAMAZAKI ,  Kenta MAEDA

IPC: H03H9/64 ,  H03H9/02 ,  H03H9/10

CPC classification number: H03H9/6483 ,  H03H9/02574 ,  H03H9/1064 ,  H03H9/6453

Abstract: In a composite filter device, a first acoustic wave resonator includes a functional electrode on a first main surface of a first piezoelectric substrate, and a wiring electrode is on the first main surface and is not connected to a signal potential. A support is on the first main surface and surrounds the first acoustic wave resonator. A second piezoelectric substrate is on the support and includes a third main surface closer to the support than a fourth main surface. A second acoustic wave resonator includes a functional electrode on the third main surface. The second acoustic wave resonator is a parallel-arm resonator higher in resonant frequency than any other parallel-arm resonator or a series-arm resonator lower in resonant frequency than any other series-arm resonator. The second acoustic wave resonator and the wiring electrode overlap each other when viewed in plan.

公开(公告)号：US11791799B2

公开(公告)日：2023-10-17

申请号：US17379090

申请日：2021-07-19

Applicant: Qorvo US, Inc.

Inventor： Manjunath Swamy

IPC: H03H9/64

CPC classification number: H03H9/6483 ,  H03H9/645 ,  H03H9/6453

Abstract: The present disclosure relates to a ladder-type surface acoustic wave (SAW) device, which includes a piezoelectric layer, two reflective structures, at least one series interdigital transducer (IDT) coupled between a first signal point and a second signal point, and at least one shunt IDT. The at least one shunt IDT is coupled at least between the first signal point and ground, or between the second signal point and ground. Herein, the two reflective structures, the at least one series IDT, and the at least one shunt IDT reside over the piezoelectric layer. The at least one series IDT and the at least one shunt IDT are arranged between the two reflective structures.