公开(公告)号：US20180013460A1

公开(公告)日：2018-01-11

申请号：US15675321

申请日：2017-08-11

申请人： Intel Mobile Communications GmbH

发明人： Michael Wilhelm ,  Bernd Adler ,  Mikael Bergholz Knudsen

IPC分类号： H04B1/18 ,  H04B7/08

CPC分类号： H04B1/18 ,  H04B7/0805

摘要： The present invention relates to various embodiments of a Radio-Frequency (RF) front-end for use in a receiver, a diversity receiver and a method for operating a diversity receiver.

公开(公告)号：US09866197B2

公开(公告)日：2018-01-09

申请号：US14298863

申请日：2014-06-06

申请人： RF Micro Devices, Inc.

发明人： George Maxim ,  Dirk Robert Walter Leipold ,  Baker Scott

IPC分类号： H03H7/46 ,  H03H7/09 ,  H03H7/01 ,  H03F3/193 ,  H04B1/10 ,  H03F1/56 ,  H03F3/24 ,  H03F3/68 ,  H03F3/72 ,  H04B1/18

CPC分类号： H03H7/465 ,  H03F1/565 ,  H03F3/193 ,  H03F3/245 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/267 ,  H03F2200/451 ,  H03F2203/7209 ,  H03H7/0115 ,  H03H7/0153 ,  H03H7/09 ,  H03H7/1775 ,  H03H7/46 ,  H03H7/463 ,  H03H2210/012 ,  H03H2210/025 ,  H03H2210/04 ,  H04B1/1027 ,  H04B1/18

摘要： RF communications circuitry, which includes a first RF filter structure, is disclosed. The first RF filter structure includes a first tunable RF filter path and a second tunable RF filter path. The first tunable RF filter path includes a pair of weakly coupled resonators. Additionally, a first filter parameter of the first tunable RF filter path is tuned based on a first filter control signal. A first filter parameter of the second tunable RF filter path is tuned based on a second filter control signal.

公开(公告)号：US09853663B2

公开(公告)日：2017-12-26

申请号：US14684701

申请日：2015-04-13

申请人： BlackBerry Limited

发明人： Keith R. Manssen ,  Matthew Russell Greene ,  Carsten Hoirup

IPC分类号： H04B1/40 ,  H04B1/04 ,  H04B1/18 ,  H04B7/26 ,  H04W24/08 ,  H04W84/04 ,  H04W84/12 ,  H04W88/08

CPC分类号： H04B1/0458 ,  H04B1/18 ,  H04B7/26 ,  H04W24/08 ,  H04W84/042 ,  H04W84/12 ,  H04W88/08

摘要： A system that incorporates teachings of the present disclosure may include, for example, a communication device having a controller to provision a matching network that controls one or more operational characteristics of one of a receiver portion and a transmitter portion of the communication device according to a profile describing one or more characteristics of a communication system from which the communication device operates. Additional embodiments are disclosed.

公开(公告)号：US09847756B1

公开(公告)日：2017-12-19

申请号：US15444233

申请日：2017-02-27

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Tong Wang

IPC分类号： H04B1/02 ,  H03F1/02 ,  H03F3/21 ,  H03F1/56 ,  H03F3/193 ,  H04B1/04 ,  H04B1/18

CPC分类号： H03F1/0205 ,  H03F1/56 ,  H03F3/193 ,  H03F3/195 ,  H03F3/211 ,  H03F3/2173 ,  H03F3/245 ,  H03F3/68 ,  H03F2200/351 ,  H03F2200/387 ,  H03F2200/462 ,  H03F2200/516 ,  H03F2203/21127 ,  H03F2203/21139 ,  H03F2203/21142 ,  H03F2203/21157 ,  H04B1/0458 ,  H04B1/18 ,  H04B2001/0408

摘要： A wireless communication device includes a signal generator supply a signal to an input node to which a power amplifier is connected. The power amplifier includes an inverter including a first transistor with a gate connected to the input node via a first signal path and a second transistor with a gate electrode connected to the input node via a second signal path. An output signal corresponding to the signal supplied to the input node is supplied from an output node between the first and second transistors. A filter is connected to the output node and outputs a filtered signal having a high frequency component removed. A bias application unit applies a first bias voltage to the first signal path and a second bias voltage to the second signal path. Levels of the bias voltages being set according to a direct current component in the filtered signal.

公开(公告)号：US20170353956A1

公开(公告)日：2017-12-07

申请号：US15679685

申请日：2017-08-17

申请人： BlackBerry Limited

发明人： Carsten Hoirup

IPC分类号： H04W72/04 ,  H04B1/18 ,  H04B1/04 ,  H04W36/24 ,  H04W52/04

CPC分类号： H04W72/0453 ,  H04B1/0458 ,  H04B1/18 ,  H04W36/24 ,  H04W52/04

摘要： A system that incorporates teachings of the present disclosure may include, for example, adjusting a tuning state of a matching network of the communication device, selecting a power offset from among a group of power offsets where the selected power offset is associated with a sub-band of operation of the communication device, and adjusting a value associated with a measured receive power or a transmit power of the communication device based on the selected power offset to generate an offset power value. Additional embodiments are disclosed.

公开(公告)号：US09832051B2

公开(公告)日：2017-11-28

申请号：US15043768

申请日：2016-02-15

申请人： IMEC VZW ,  Vrije Universiteit Brussel

发明人： Jan Craninckx ,  Mark Ingels ,  Pedro Emiliano Paro Filho

IPC分类号： H04L27/00 ,  H04B1/04 ,  H04B1/18

CPC分类号： H04L27/0002 ,  H04B1/0475 ,  H04B1/0483 ,  H04B1/18 ,  H04B2001/0491

摘要： The present disclosure relates to a front-end system for a radio device comprising: a charge generator circuit arranged for receiving a digital baseband signal, a first converter circuit arranged for calculating at least one charge value based on the digital baseband signal, a second converter circuit arranged for converting the at least one charge value into at least one electrical charge, and a modulator circuit arranged for generating a radio frequency signal based on the at least one electrical charge and at least one local oscillator signal.

公开(公告)号：US20170310346A1

公开(公告)日：2017-10-26

申请号：US15479414

申请日：2017-04-05

申请人： The Charles Stark Draper Laboratory, Inc.

发明人： Douglas W. White ,  Seth M. Davis

IPC分类号： H04B1/04 ,  H04B1/14 ,  H04B1/40 ,  H04B17/10

CPC分类号： H04B1/0458 ,  H04B1/14 ,  H04B1/18 ,  H04B1/40 ,  H04B5/0037 ,  H04B17/102 ,  H04B2001/045

摘要： A method of adapting an antenna to a transceiver system having a receiver subsystem and a transmitter subsystem comprises using an automatic tuning system to tune the antenna with respect to the receiver subsystem. The tuning results in an optimal receive signal at the receiver subsystem in response to RF energy radiated to the antenna. The tuning system may include a tuning detection element for radiating RF energy to the antenna, and a tuning element for tuning the antenna. After tuning the antenna, the method further comprises tuning a tunable matching network, coupled between an output of an RF power device of the transmitter subsystem and an input of the antenna, to facilitate an optimal power transfer amount from the RF power device to the antenna while the RF power device operates according to certain desired parameters. The desired parameters may include output power and efficiency.

公开(公告)号：US09800278B2

公开(公告)日：2017-10-24

申请号：US15257354

申请日：2016-09-06

申请人： North Carolina State University

发明人： Brian Allan Floyd ,  Charley Theodore Wilson, III ,  Jeffrey Franklin Bonner-Stewart ,  Frederick Vosburgh

IPC分类号： H04B1/44 ,  H04B1/10 ,  H04L7/00

CPC分类号： H04B1/1081 ,  H03D7/165 ,  H03D2200/0074 ,  H03H7/20 ,  H03H7/463 ,  H04B1/1036 ,  H04B1/18 ,  H04L7/0016

摘要： Tunable filters, cancellers, and duplexers based on passive mixers. A tunable delay cell includes passive mixers electrically coupled together for receiving an input signal and outputting a delayed signal, each passive mixer comprising a plurality of mixer switches. The tunable delay includes a control circuit for providing, to each passive mixer, a respective plurality of local oscillator (LO) signals, one to each mixer switch of each passive mixer. The control circuit is configured to vary the LO signals to cause a target frequency band of the input signal to be delayed by a target delay time in propagating through the passive mixers.

公开(公告)号：US20170302317A1

公开(公告)日：2017-10-19

申请号：US15631711

申请日：2017-06-23

申请人： Murata Manufacturing Co., Ltd.

发明人： Atsushi Horita ,  Takaya Wada ,  Hirokazu Nakae

IPC分类号： H04B1/18 ,  H03H7/46 ,  H03H7/075 ,  H03H7/38 ,  H04B1/40 ,  H03H9/145

CPC分类号： H04B1/18 ,  H03H7/075 ,  H03H7/38 ,  H03H7/46 ,  H03H9/145 ,  H04B1/00 ,  H04B1/0057 ,  H04B1/0064 ,  H04B1/40

摘要： A front-end circuit includes an antenna terminal, front-end terminals (Pfe1, Pfe2), a circulator, and frequency-variable filters. The circulator sends transmission signals of communication bands of a frequency division duplex system and a time division duplex system from the front-end terminal (Pfe1) to the antenna terminal. The circulator sends a reception signal from the antenna terminal to the front-end terminal (Pfe2). The frequency-variable filter is connected between the front-end terminal (Pfe1) and the circulator, passes transmission signals of the frequency division duplex system and the time division duplex system, and attenuates signals other than the above transmission signals. The frequency-variable filter is connected between the circulator and the front-end terminal (Pfe2), passes a reception signal of the frequency division duplex system, and attenuates signals other than the above reception signal.

公开(公告)号：US20170302246A1

公开(公告)日：2017-10-19

申请号：US15640763

申请日：2017-07-03

申请人： Murata Manufacturing Co., Ltd.

发明人： Kenichi ISHIZUKA

IPC分类号： H03H7/38 ,  H01Q1/24 ,  H04B1/18 ,  H04B1/40 ,  H04B1/04

CPC分类号： H03H7/38 ,  H01Q1/24 ,  H03H7/09 ,  H03H2001/0085 ,  H04B1/04 ,  H04B1/0458 ,  H04B1/18 ,  H04B1/40

摘要： An antenna device includes an impedance converter circuit connected to a feeder circuit, an impedance-conversion-ratio adjustment circuit, and an antenna. The impedance converter circuit includes a first inductance element and a second inductance element, which are coupled to each other through magnetic fields, so as to provide an autotransformer circuit. The impedance-conversion-ratio adjustment circuit includes a third inductance element which is series-connected between the impedance converter circuit and an antenna port, and a capacitance element which is shunt-connected between the antenna port and ground. The impedance-conversion-ratio adjustment circuit corrects an impedance conversion ratio of the impedance converter circuit in accordance with a frequency band.