公开(公告)号：US12119666B2

公开(公告)日：2024-10-15

申请号：US17498669

申请日：2021-10-11

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Shiming Wan

IPC: H02J50/80 ,  H02J50/12 ,  H03H7/38

CPC classification number: H02J50/12 ,  H02J50/80 ,  H03H7/38 ,  H03H2210/025 ,  H03H2210/026

Abstract: Disclosed are a power matching method and apparatus for wireless charging, and a wireless charging apparatus. The method includes receiving first sensing information sensed from a transmitting coil of the wireless transmitter, wherein the transmitting coil includes at least one of a capacitor assembly with adjustable capacitance and an inductor assembly with adjustable inductance; detecting whether resonant frequency has changed according to the first sensing information; and adjusting at least one of capacitance of the capacitor assembly in the transmitting coil of the wireless transmitter and inductance of the inductor assembly in the transmitting coil in response to the resonant frequency changing to make transmitting power of the wireless transmitter be matched with receiving power of a wireless receiver in the wireless charging system, wherein the first sensing information comprises at least one of a first sensing voltage value and a first sensing current value.

公开(公告)号：US20230361748A1

公开(公告)日：2023-11-09

申请号：US18132975

申请日：2023-04-11

Applicant: SKYWORKS SOLUTIONS, INC.

Inventor： Anuranjan HOSAGAVI PUTTARAJU ,  Gunjan PANDEY ,  Paul Raymond ANDRYS

IPC: H03H7/46 ,  H03H11/36 ,  H03H7/48

CPC classification number: H03H7/461 ,  H03H11/362 ,  H03H7/48 ,  H03H2210/025

Abstract: A broadband power splitter can include an input port, a first output port and a second output port. The power splitter can further include a first signal path implemented between the input port and the first output port, and a second signal path implemented between the input port and the second output port. Each of the first and second signal paths can include a variable capacitance configured to provide a plurality of capacitance values that result in different frequency responses of the respective signal path.

公开(公告)号：US20190181550A1

公开(公告)日：2019-06-13

申请号：US15974702

申请日：2018-05-09

Applicant: Wistron NeWeb Corp.

Inventor： Yung-Jinn Chen ,  Yu-Meng Yen

IPC: H01Q5/335 ,  H03F1/56 ,  H03H7/40 ,  H04B1/04

CPC classification number: H01Q5/335 ,  H03F1/565 ,  H03F3/24 ,  H03H7/38 ,  H03H7/40 ,  H03H2007/386 ,  H03H2210/025 ,  H04B1/006 ,  H04B1/0458 ,  H04B1/18 ,  H04B1/525

Abstract: A wireless communication device includes a first antenna, a second antenna, a first switching circuit, and a first tunable matching circuit. The first switching circuit is electrically connected to the first antenna, the second antenna, and the first tunable matching circuit. In a first operation mode, the first antenna of the wireless communication device performs signal transmission or reception, an impedance value corresponding to the first tunable matching circuit is adjusted to a first impedance value, and the second antenna is conducted to the first tunable matching circuit through the first switching circuit. In a second operation mode, the second antenna of the wireless communication device performs signal transmission or reception, the impedance value corresponding to the first tunable matching circuit is adjusted to a second impedance value, and the first antenna is conducted to the first tunable matching circuit through the first switching circuit.

公开(公告)号：US20180234078A1

公开(公告)日：2018-08-16

申请号：US15956032

申请日：2018-04-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takaya WADA ,  Koji NOSAKA

IPC: H03H9/58 ,  H03H9/64

CPC classification number: H03H9/58 ,  H03H9/6403 ,  H03H9/6406 ,  H03H9/6483 ,  H03H2009/02165 ,  H03H2210/025 ,  H03H2210/033 ,  H03H2210/036

Abstract: A tunable filter includes a series-arm resonant circuit, and a parallel-arm resonant circuit. The series-arm resonant circuit includes a group of acoustic wave resonant circuits that have different resonant frequencies, a variable capacitor, and switching circuits. The parallel-arm resonant circuit includes another group of acoustic wave resonant circuits that have different resonant frequencies, a variable capacitor, and switching circuits. For example, the difference in pass-band frequency caused by the difference in resonant frequency between the acoustic wave resonant circuit in the group and the acoustic wave resonant circuit in the other group is greater than the maximum difference in pass-band frequency resulting from the variable range of capacitance of the variable capacitor.

公开(公告)号：US20180198181A1

公开(公告)日：2018-07-12

申请号：US15866794

申请日：2018-01-10

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Mikiko Fukasawa

IPC: H01P1/202 ,  H04W72/08 ,  H04B1/18 ,  H04B1/04 ,  H03H7/12 ,  H03F1/32 ,  H03H7/01 ,  H03F3/24 ,  H03F3/195

CPC classification number: H01P1/202 ,  H03F1/3247 ,  H03F3/195 ,  H03F3/24 ,  H03F2200/451 ,  H03H7/0115 ,  H03H7/12 ,  H03H7/1758 ,  H03H7/1766 ,  H03H2210/025 ,  H03H2210/036 ,  H04B1/0475 ,  H04B1/18 ,  H04W72/08

Abstract: When a plurality of RF signals having different frequency bands are output at the same time by carrier aggregation, a switch element allows parallel connection between two capacitance elements such that a low pass filter has a first cut-off frequency that is lower than the frequency of an intermodulation distortion signal generated by the carrier aggregation. When an RF signal of a frequency band is output, the switch element releases parallel connection between the two capacitance elements such that the low pass filter has a second cut-off frequency that is higher than the first cut-off frequency.

公开(公告)号：US09900060B1

公开(公告)日：2018-02-20

申请号：US15153422

申请日：2016-05-12

Applicant: Superlative Semiconductor, LLC

Inventor： Edward A. Keehr

IPC: H04B5/00 ,  H01P5/18 ,  H03H7/18 ,  H01P1/18 ,  H03H7/38 ,  G06K19/077 ,  G06K7/10

CPC classification number: H04B5/0062 ,  G06K7/10316 ,  G06K19/07775 ,  H01P1/184 ,  H01P5/18 ,  H03H7/185 ,  H03H7/383 ,  H03H2210/025

Abstract: A tunable microwave network and its application in a radio transceiver transmit signal cancellation network is described. The tunable microwave network realizes a large set of reflection coefficients over a predefined area in the complex reflection coefficient plane for the purpose of reflecting a variable cancellation signal which, when properly configured, results in the substantial attenuation of transmit reflection and transmit leakage signal at the radio transceiver receiver input. A relevant building block of the proposed tunable microwave network is a shunt tunable capacitive element coupled to another shunt tunable capacitive element through a phase shifting element with phase shift greater than 30 degrees divided by a quantity substantially similar to the total number of said tunable capacitive elements and less than 60 degrees at a predefined frequency.

公开(公告)号：US20180019729A1

公开(公告)日：2018-01-18

申请号：US15718354

申请日：2017-09-28

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideki Tsukamoto

IPC: H03H9/50 ,  H04B1/00 ,  H03H9/64

CPC classification number: H03H9/50 ,  H01P1/20 ,  H03H7/0161 ,  H03H7/075 ,  H03H9/64 ,  H03H9/703 ,  H03H9/72 ,  H03H2210/012 ,  H03H2210/025 ,  H03H2250/00 ,  H04B1/0057 ,  H04B1/006 ,  H04B1/18 ,  H04B1/52

Abstract: A high-frequency filter includes a variable frequency filter, a fixed frequency filter, and switches. The variable frequency filter varies a passband in association with frequencies used in multiple communication band. The fixed frequency filter fixes a passband in association with a frequency used in a specific communication band different from the multiple communication bands. The switches are used to switch connection configuration to the variable frequency filter or the fixed frequency filter.

公开(公告)号：US20180019045A1

公开(公告)日：2018-01-18

申请号：US15717525

申请日：2017-09-27

Applicant: Qorvo US, Inc.

Inventor： George Maxim ,  Dirk Robert Walter Leipold ,  Baker Scott

IPC: H01F17/00 ,  H03F3/24 ,  H03F3/72 ,  H03F1/56 ,  H03F3/193 ,  H03F3/68 ,  H03H7/01 ,  H03H7/09

CPC classification number: H01F17/0013 ,  H03F1/565 ,  H03F3/193 ,  H03F3/245 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/267 ,  H03F2200/391 ,  H03F2200/451 ,  H03F2203/7209 ,  H03H7/09 ,  H03H7/1775 ,  H03H2210/012 ,  H03H2210/025 ,  H03H2210/04 ,  H04B1/525

Abstract: Embodiments of an apparatus that includes a substrate and an inductor residing in the substrate are disclosed. In one embodiment, the inductor is formed as a conductive path that extends from a first terminal to a second terminal. The conductive path has a shape corresponding to a two-dimensional (2D) lobe laid over a three-dimensional (3D) volume. Since the shape of the conductive path corresponds to the 2D lobe laid over a 3D volume, the magnetic field generated by the inductor has magnetic field lines that are predominately destructive outside the inductor and magnetic field lines that are predominately constructive inside the inductor. In this manner, the inductor can maintain a high quality (Q) factor while being placed close to other components.

公开(公告)号：US20180013403A1

公开(公告)日：2018-01-11

申请号：US15694653

申请日：2017-09-01

Applicant: RESONANT INC.

Inventor： Genichi Tsuzuki ,  Balam A. Willemsen

IPC: H03H9/46 ,  G06F17/50 ,  H01P1/20 ,  H01P1/203 ,  H03H3/00 ,  H03H7/06 ,  H03H9/64 ,  H03H9/54 ,  H03H9/17 ,  H03H7/12 ,  H03H7/075 ,  H03H7/01 ,  H03H9/02 ,  H03H7/54

CPC classification number: H03H9/465 ,  G06F17/5036 ,  G06F17/5045 ,  G06F17/5063 ,  G06F17/5072 ,  G06F17/5077 ,  G06F2217/02 ,  G06F2217/08 ,  G06F2217/16 ,  G06F2217/82 ,  H01P1/20 ,  H01P1/20336 ,  H03H3/00 ,  H03H7/0153 ,  H03H7/0161 ,  H03H7/06 ,  H03H7/075 ,  H03H7/12 ,  H03H7/1758 ,  H03H7/1791 ,  H03H7/54 ,  H03H9/171 ,  H03H9/46 ,  H03H9/462 ,  H03H9/542 ,  H03H9/64 ,  H03H9/6406 ,  H03H2007/013 ,  H03H2009/02204 ,  H03H2210/012 ,  H03H2210/025 ,  H03H2210/033 ,  Y10T29/49018

Abstract: A method of constructing an RF filter comprises designing an RF filter that includes a plurality of resonant elements disposed, a plurality of non-resonant elements coupling the resonant elements together to form a stop band having a plurality of transmission zeroes corresponding to respective frequencies of the resonant elements, and a sub-band between the transmission zeroes. The non-resonant elements comprise a variable non-resonant element for selectively introducing a reflection zero within the stop band to create a pass band in the sub-band. The method further comprises changing the order in which the resonant elements are disposed along the signal transmission path to create a plurality of filter solutions, computing a performance parameter for each of the filter solutions, comparing the performance parameters to each other, selecting one of the filter solutions based on the comparison of the computed performance parameters, and constructing the RF filter using the selected filter solution.

公开(公告)号：US20170324393A1

公开(公告)日：2017-11-09

申请号：US15632758

申请日：2017-06-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Udo Karthaus

IPC: H03H7/46 ,  H01P5/18 ,  H03H7/01 ,  H04B1/52 ,  H03F3/19 ,  H03F3/21

CPC classification number: H03H7/463 ,  H01P5/184 ,  H03F3/19 ,  H03F3/21 ,  H03F2200/255 ,  H03F2200/294 ,  H03F2200/451 ,  H03H7/0153 ,  H03H2210/025 ,  H04B1/52

Abstract: A radio frequency duplexer with a first directional coupler configured to divide an input reception signal into a first auxiliary reception signal and a second auxiliary reception signal, where the first auxiliary reception signal and the second auxiliary reception signal comprise signal components at a reception frequency, a first filter configured to filter the first auxiliary reception signal to obtain a third auxiliary reception signal, a second filter configured to filter the second auxiliary reception signal to obtain a fourth auxiliary reception signal, where pass bands of the first and the second filters comprise the reception frequency, a second directional coupler configured to combine the third auxiliary reception signal with the fourth auxiliary reception signal to obtain an output reception signal.