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公开(公告)号：US20180083591A1
公开(公告)日：2018-03-22
申请号：US15711692
申请日：2017-09-21
申请人： Abtum Inc.
发明人： Sam Mandegaran
摘要： A radio frequency (RF) duplexer may comprise quadrature hybrid couplers and RF filters. The isolation and insertion loss of such RF duplexer, often limited by practical imperfections such as component mismatches and layout asymmetries, may be improved by including capacitors in the RF duplexer. A tunable or reconfigurable RF duplexer with high isolation and low insertion loss, under all desired settings, may be realized by adding tunable capacitors to the tunable RF duplexer which includes the quadrature hybrid couplers and tunable RF filters.
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公开(公告)号：US09866201B2
公开(公告)日：2018-01-09
申请号：US15217225
申请日：2016-07-22
申请人： Abtum Inc.
发明人： Hossein Hashemi , Behnam Analui
CPC分类号： H03H9/725 , H01P5/18 , H03H9/706 , H03H2009/02165
摘要： An all-acoustic filter includes acoustic directional couplers and acoustic filters. In one embodiment, the all-acoustic filter includes two acoustic directional couplers, pair of matched acoustic filters corresponding to either transmit or receive frequency bands, and another acoustic filter corresponding to the other of transmit or receive frequency bands. An all-acoustic duplexer may be realized monolithically in a small form factor, may be tunable, may support multiple transmit or receive frequency bands, or may include schemes for antenna mismatch correction.
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公开(公告)号：US20170070205A1
公开(公告)日：2017-03-09
申请号：US15217225
申请日：2016-07-22
申请人： Abtum Inc.
发明人： Hossein Hashemi , Behnam Analui
CPC分类号： H03H9/725 , H01P5/18 , H03H9/706 , H03H2009/02165
摘要： An all-acoustic filter includes acoustic directional couplers and acoustic filters. In one embodiment, the all-acoustic filter includes two acoustic directional couplers, pair of matched acoustic filters corresponding to either transmit or receive frequency bands, and another acoustic filter corresponding to the other of transmit or receive frequency bands. An all-acoustic duplexer may be realized monolithically in a small form factor, may be tunable, may support multiple transmit or receive frequency bands, or may include schemes for antenna mismatch correction.
摘要翻译： 全声学滤波器包括声学定向耦合器和声学滤波器。 在一个实施例中，全声学滤波器包括两个声学定向耦合器，对应于发射或接收频带的一对匹配的声学滤波器，以及对应于发射或接收频带中的另一个的另一个声学滤波器。 全声学双工器可以以小尺寸单体实现，可以是可调谐的，可以支持多个发射或接收频带，或者可以包括用于天线失配校正的方案。
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公开(公告)号：US20170099652A1
公开(公告)日：2017-04-06
申请号：US15280571
申请日：2016-09-29
申请人： Abtum Inc.
发明人： Sam Mandegaran
CPC分类号： H04B1/005 , H04B1/0057 , H04W72/0453
摘要： A radio frequency multiplexer, which supports a plurality of frequency bands, comprises a common node, a plurality of single band nodes, and a plurality of parallel branches. Each of the plurality of parallel branches is designated to one of the plurality of frequency bands and connects the common node and one of the plurality of single band nodes. A particular branch of the parallel branches may comprises a filter for a desired frequency band that passes through the particular branch, a quadrature hybrid coupler coupled to the filter, and a set of one or more other filters for one or more other frequency bands in the plurality of frequency bands respectively. The set of one or more other filters is coupled to the quadrature hybrid coupler for rejecting the one or more other frequency bands by the particular branch.
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公开(公告)号：US20170093441A1
公开(公告)日：2017-03-30
申请号：US15280083
申请日：2016-09-29
申请人： Abtum Inc.
发明人： Sam Mandegaran , Hossein Hashemi
CPC分类号： H04B1/005 , H04B1/0458 , H04B1/48 , H04B17/10
摘要： A radio frequency (RF) circuitry includes a device that taps a transmission line and picks up some of electromagnetic signals traveling in both directions. The RF circuitry includes a first detector, a second detector, a third detector, and a processor. The first detector measures a power of a first portion of the tapped electromagnetic signal travelling in one direction. The second detector measures a power of a first portion of the tapped electromagnetic signal travelling in the other direction. The third detector measures a power of a combined signal which includes a second portion of the tapped electromagnetic signal travelling in the one direction and a second portion of the tapped electromagnetic signal travelling in the other direction. The processor determines, based on outputs from the detectors, a relative magnitude and a relative phase of the electromagnetic signals.
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公开(公告)号：US20170070217A1
公开(公告)日：2017-03-09
申请号：US15208394
申请日：2016-07-12
申请人： Abtum Inc.
发明人： Sam Mandegaran
CPC分类号： H03K5/125 , H04B1/40 , H04B1/525 , H04L5/14 , H04L5/1461
摘要： A method for maintaining good cancelation in a passive feed-forward cancelation circuit is disclosed. The feed-forward cancelation circuit may include at least one path which may comprise a phase-shifter and a variable attenuator. This method uses the complex value of the reflection coefficient at the point where the communication device is connected to a transmission medium, such as an antenna, to determine the values for the phase shifter(s) and the variable attenuator(s).
摘要翻译： 公开了一种在无源前馈消除电路中维持良好消除的方法。 前馈消除电路可以包括至少一个可以包括移相器和可变衰减器的路径。 该方法使用通信装置与诸如天线的传输介质连接的点处的反射系数的复数值，以确定移相器和可变衰减器的值。
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公开(公告)号：US20180309464A1
公开(公告)日：2018-10-25
申请号：US15528876
申请日：2016-09-30
申请人： ABTUM INC.
发明人： Sam Mandegaran
摘要： A radio frequency (RF) multiplexer includes, for example, a common port, a first port for a first frequency band, a second port for a second frequency band, and a third port for a third frequency band. The RF multiplexer also includes, for example, a first quadrature hybrid coupler (QHC), a second QHC and a third QHC. A coupling of the first QHC, a first pair of filters, and the second QHC separates the first frequency band and the second frequency band from the common port to the first port and to the second port, respectively. A coupling of the first QHC, a second pair of filters, and the third QHC separates the first frequency band and the third frequency band from the common port to the first port and to the third port respectively.
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公开(公告)号：US10038458B2
公开(公告)日：2018-07-31
申请号：US15280571
申请日：2016-09-29
申请人： Abtum Inc.
发明人： Sam Mandegaran
CPC分类号： H04B1/005 , H04B1/0057 , H04W72/0453
摘要： A radio frequency multiplexer, which supports a plurality of frequency bands, comprises a common node, a plurality of single band nodes, and a plurality of parallel branches. Each of the plurality of parallel branches is designated to one of the plurality of frequency bands and connects the common node and one of the plurality of single band nodes. A particular branch of the parallel branches may comprises a filter for a desired frequency band that passes through the particular branch, a quadrature hybrid coupler coupled to the filter, and a set of one or more other filters for one or more other frequency bands in the plurality of frequency bands respectively. The set of one or more other filters is coupled to the quadrature hybrid coupler for rejecting the one or more other frequency bands by the particular branch.
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公开(公告)号：US20170070368A1
公开(公告)日：2017-03-09
申请号：US15220068
申请日：2016-07-26
申请人： Abtum Inc.
发明人： Sam Mandegaran
CPC分类号： H04L25/03019 , H01Q1/243 , H01Q9/0442 , H01Q15/14 , H03F3/24 , H04B2001/0408 , H04L25/0278 , H04L25/03031
摘要： The disclosure provides circuitry and methods to determine the reflection coefficient of a transmission line connected another physical element or device such as an antenna. The outgoing and the reflected signals on the transmission line are compared using two separate paths, with one path going through a signal conditioning circuitry such as an equalizer. The two paths are then combined and detected. A lookup table may be used for non-linear responses.
摘要翻译： 本公开提供了确定连接另一个物理元件或设备（例如天线）的传输线的反射系数的电路和方法。 使用两条单独的路径比较传输线路上的输出和反射信号，其中一条路径经过诸如均衡器的信号调理电路。 然后组合并检测两条路径。 查找表可用于非线性响应。
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公开(公告)号：US09912326B2
公开(公告)日：2018-03-06
申请号：US15208394
申请日：2016-07-12
申请人： Abtum Inc.
发明人： Sam Mandegaran
CPC分类号： H03K5/125 , H04B1/40 , H04B1/525 , H04L5/14 , H04L5/1461
摘要： A method for maintaining good cancelation in a passive feed-forward cancelation circuit is disclosed. The feed-forward cancelation circuit may include at least one path which may comprise a phase-shifter and a variable attenuator. This method uses the complex value of the reflection coefficient at the point where the communication device is connected to a transmission medium, such as an antenna, to determine the values for the phase shifter(s) and the variable attenuator(s).
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