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公开(公告)号：US10027353B2
公开(公告)日：2018-07-17
申请号：US15235267
申请日：2016-08-12
摘要： A high-frequency front end circuit includes a duplexer, a phase adjustment circuit, and a power amplifier. The phase adjustment circuit is connected between the power amplifier and a transmission filter of the duplexer. The phase adjustment circuit carries out phase adjustment so that a quadrant in which an impedance ZRX (fr0) seen from the transmission filter toward the power amplifier at the fundamental frequency of a reception signal is present and a quadrant in which an impedance ZTX (fr0) seen from the power amplifier toward the transmission filter at the fundamental frequency of the reception signal is present are not in a conjugate relationship with respect to the phase.
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公开(公告)号：US09739871B2
公开(公告)日：2017-08-22
申请号：US14681163
申请日：2015-04-08
发明人： Hidenori Obiya , Ryuken Mizunuma , Shinya Mizoguchi , Atsuyuki Yuasa , Shinya Hitomi , Hisao Hayafuji
摘要： A reflected signal detector (12) detects the amplitude and the phase of a reflected signal and outputs detection signals. A control circuit (13) adjusts first control signals and second control signals on the basis of the detection signals. A first cancel signal output portion (9) adjusts a first cancel signal so that the first cancel signal has a phase opposite to that of the reflected signal and has the same amplitude as that of the reflected signal using the first control signals. A second cancel signal output portion (10) adjusts a second cancel signal so that the second cancel signal has a phase opposite to that of a leakage signal and has the same amplitude as that of the leakage signal using the second control signals. A combining portion (11) combines a reception signal including noise signals with the first and second cancel signals.
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公开(公告)号：US20160127115A1
公开(公告)日：2016-05-05
申请号：US14988113
申请日：2016-01-05
发明人： Hisao Hayafuji
CPC分类号： H04L5/1461 , H04B1/0057 , H04B1/006 , H04B1/10 , H04B1/48 , H04W72/0453
摘要： A front-end circuit includes a switching circuit and a low-pass filter. The switching circuit includes common terminals and to-be-selected terminals. The common terminals are connected to each other, and a connection point at which the common terminals are connected to each other is connected to an antenna. The common terminal is directly connected to the connection point. The common terminal is connected to the connection point with the low-pass filter interposed there between.
摘要翻译： 前端电路包括开关电路和低通滤波器。 开关电路包括公共端子和被选择端子。 公共端子彼此连接，并且公共端子彼此连接的连接点连接到天线。 公共终端直接连接到连接点。 公共端子连接到连接点，其间插入有低通滤波器。
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公开(公告)号：US09960898B2
公开(公告)日：2018-05-01
申请号：US15235295
申请日：2016-08-12
IPC分类号： H04B1/10 , H03K5/01 , H04L1/00 , H04B1/38 , H04L5/12 , H04B1/52 , H04B1/04 , H04B1/18 , H04L5/10
CPC分类号： H04L5/12 , H04B1/0458 , H04B1/18 , H04B1/52 , H04L5/10
摘要： A radio frequency front-end circuit includes a duplexer, a phase adjustment circuit, and a low noise amplifier. The phase adjustment circuit is connected between an Rx filter of the duplexer and the low noise amplifier. The phase adjustment circuit executes phase adjustment such that a quadrant in which an impedance ZLNA(fn) at a particular frequency different from a fundamental frequency of a reception signal when looking at the low noise amplifier side from the Rx filter is present and a quadrant in which an impedance ZRX(fn) at the particular frequency when looking at the Rx filter side from the low noise amplifier is present are not in a conjugate relation in terms of phase.
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5.发明授权公开(公告)号：US09787334B2
公开(公告)日：2017-10-10
申请号：US15081474
申请日：2016-03-25
发明人： Hidenori Obiya , Hisao Hayafuji , Takaya Wada , Shinya Hitomi
CPC分类号： H04B1/0475 , H03F3/195 , H03F3/211 , H03F3/245 , H03F2200/111 , H03F2200/165 , H03F2200/168 , H03F2200/171 , H03F2200/294 , H03F2200/408 , H03F2200/411 , H03F2200/451 , H03F2203/21157 , H04B1/525
摘要： A high frequency power amplifier includes a first high frequency amplifier, a final high frequency amplifier, and a tunable filter. The tunable filter is connected between the first high frequency amplifier and the final high frequency amplifier. The first high frequency amplifier and the final high frequency amplifier are each a multimode/multiband power amplifier. The tunable filter is regulated such that its pass band includes the frequency band of a transmission signal and its attenuation band includes the frequency band of a reception signal in a communication band used in transmission and reception. The pass band and the attenuation band are switched by the tunable filter in accordance with the communication band used in transmission and reception.
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公开(公告)号：US09287918B2
公开(公告)日：2016-03-15
申请号：US14050406
申请日：2013-10-10
发明人： Hisao Hayafuji , Shinya Mizoguchi , Hidenori Obiya
CPC分类号： H04B1/40 , H04B1/0057
摘要： A high-frequency front-end circuit includes a first variable filter and a second variable filter. One end of each of the variable filters is connected to a common terminal. The other end of the first variable filter is connected to a transmission individual terminal and the other end of the second variable filter is connected to a reception individual terminal. At the time of transmission of a transmission signal, the impedance of the second variable filter is adjusted such that the impedance seen on the second variable filter side from a connection point between the variable filters is open. At the time of transmission of a reception signal, the impedance of the first variable filter is adjusted such that the impedance seen on the first variable filter side from a connection point between the variable filters is open.
摘要翻译： 高频前端电路包括第一可变滤波器和第二可变滤波器。 每个可变滤波器的一端连接到公共端子。 第一可变滤波器的另一端连接到传输单独端子，第二可变滤波器的另一端连接到接收单独端子。 在发送发送信号时，调整第二可变滤波器的阻抗，使得在可变滤波器之间的连接点处在第二可变滤波器侧看到的阻抗是断开的。 在发送接收信号时，调整第一可变滤波器的阻抗，使得在可变滤波器之间的连接点处的第一可变滤波器侧所看到的阻抗是断开的。
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公开(公告)号：US08891596B2
公开(公告)日：2014-11-18
申请号：US14182640
申请日：2014-02-18
发明人： Hisao Hayafuji , Koji Furutani
CPC分类号： H04B1/40 , H03H7/40 , H03H7/465 , H04B1/0057 , H04B1/48
摘要： A high frequency front end module includes a variable circulator, a transmission side filter, and a reception side filter. Capacitors that are to be selectively connected by a switch are provided between an antenna side port and a transmission side port of a circulator of the variable circulator. Capacitors that are to be selectively connected by a switch are provided between the antenna side port and a reception side port of the circulator. Capacitors that are to be selectively connected by a switch are provided between the transmission side port and the reception side port of the circulator. By selecting the capacitors, phase characteristics between the ports are adjusted to the characteristics in accordance with a transmission signal and a reception signal to be transmitted.
摘要翻译： 高频前端模块包括可变环路器，发送侧滤波器和接收侧滤波器。 通过开关选择性地连接的电容器设置在可变循环器的环行器的天线侧端口和发送侧端口之间。 通过开关选择性地连接的电容器设置在天线侧端口和循环器的接收侧端口之间。 通过开关选择性地连接的电容器设置在循环器的发送侧端口和接收侧端口之间。 通过选择电容器，根据要发送的发送信号和接收信号，将端口之间的相位特性调整为特性。
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公开(公告)号：US10057044B2
公开(公告)日：2018-08-21
申请号：US14988113
申请日：2016-01-05
发明人： Hisao Hayafuji
CPC分类号： H04L5/1461 , H04B1/0057 , H04B1/006 , H04B1/10 , H04B1/48 , H04W72/0453
摘要： A front-end circuit includes a switching circuit and a low-pass filter. The switching circuit includes common terminals and to-be-selected terminals. The common terminals are connected to each other, and a connection point at which the common terminals are connected to each other is connected to an antenna. The common terminal is directly connected to the connection point. The common terminal is connected to the connection point with the low-pass filter interposed there between.
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公开(公告)号：US09979419B2
公开(公告)日：2018-05-22
申请号：US14993463
申请日：2016-01-12
发明人： Hisao Hayafuji , Hidenori Obiya , Shinya Mizoguchi
CPC分类号： H04B1/0057 , H04B1/0458 , H04B1/0483 , H04B1/18
摘要： A front-end circuit includes a multiplexer, a circulator, reception ports, and variable filters. A port in the multiplexer is connected to an antenna. A port in the circulator is connected to a port in the multiplexer. The reception ports are connected to a port in the circulator with the variable filters interposed therebetween. The multiplexer outputs a communication signal having a frequency in a low band to the port and outputs a communication signal having a frequency in a middle band to a port. Each of the low band and the middle band includes a plurality of frequency bands. The middle band is a range of frequencies higher than those in the low band and does not overlap the low band.
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公开(公告)号：US20160254828A1
公开(公告)日：2016-09-01
申请号：US15093049
申请日：2016-04-07
发明人： Hisao Hayafuji
CPC分类号： H04B1/0057 , H04B1/50 , H04L5/14 , H04W84/12
摘要： An antenna of a high-frequency front end circuit is connected to a duplexer and a filter. A reception-side filter of the duplexer is connected to a first reception signal output terminal. The filter is connected to the ground with a terminating resistor interposed there between. The reception-side filter is a filter which has a pass band including a frequency range of a reception signal having a first frequency band. The filter is a filter which has a pass band including a frequency range of a communication signal having a second frequency band and which has an attenuation range including the frequency range of the reception signal having the first frequency band.
摘要翻译： 高频前端电路的天线连接到双工器和滤波器。 双工器的接收侧滤波器连接到第一接收信号输出端子。 滤波器连接到地面，其间插入有终端电阻。 接收侧滤波器是具有包括具有第一频带的接收信号的频率范围的通带的滤波器。 滤波器是具有包括具有第二频带的通信信号的频率范围的通带的滤波器，并且具有包括具有第一频带的接收信号的频率范围的衰减范围的滤波器。
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