公开(公告)号：US20130272349A1

公开(公告)日：2013-10-17

申请号：US13448980

申请日：2012-04-17

申请人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04L25/49 ,  H04B1/38

CPC分类号： H04B1/525 ,  H03F1/3241 ,  H04B1/0475 ,  H04B2001/0425

摘要： A circuit includes a local oscillator of a transmitter, the local oscillator to generate a transmitter local oscillator signal. A switch controlled by the transmitter local oscillator signal connects with a baseband impedance element to generate a notch frequency signal. The notch frequency signal is added to a transmitter leakage signal to attenuate the transmitter leakage signal prior to demodulation of a desired receiver signal by a receiver.

摘要翻译： 电路包括发射机的本地振荡器，本地振荡器产生发射机本地振荡器信号。 由发射机本地振荡器信号控制的开关与基带阻抗元件连接以产生陷波频率信号。 陷波频率信号被添加到发射机泄漏信号，以在由接收机解调期望的接收机信号之前衰减发射机泄漏信号。

公开(公告)号：US20130241669A1

公开(公告)日：2013-09-19

申请号：US13419631

申请日：2012-03-14

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H01P5/12 ,  H03H7/38 ,  H03F1/08

CPC分类号： H04B1/52 ,  H04B1/005 ,  H04B1/525 ,  H04B1/581

摘要： A duplexing system may be used with an electronic device. The duplexing system may include a duplexer connected with an antenna. The duplexing system may include a balancing network. The balancing network may be connected with the duplexer, have an adjustable network impedance, and include an active component. The balancing network may be configured to adjust the network impedance to match an antenna impedance of the antenna.

摘要翻译： 双工系统可以与电子设备一起使用。 双工系统可以包括与天线连接的双工器。 双工系统可以包括平衡网络。 平衡网络可以与双工器连接，具有可调整的网络阻抗，并且包括有源组件。 平衡网络可以被配置为调整网络阻抗以匹配天线的天线阻抗。

公开(公告)号：US08502626B2

公开(公告)日：2013-08-06

申请号：US12727314

申请日：2010-03-19

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H03H11/08 ,  H04B1/38

CPC分类号： H03H11/42 ,  H03H11/32 ,  H03H11/342 ,  H04B5/0093 ,  H04B2001/485

摘要： An RF front-end with on-chip transmitter/receiver isolation using a gyrator is presented herein. The RF front end is configured to support full-duplex communication and includes a gyrator and a transformer. The gyrator includes a metal plate and an inductor that are configured to isolate the input of a low-noise amplifier (LNA) from the output of a power amplifier (PA) using the Hall effect. The gyrator is further configured to isolate the output of the PA from the input of the LNA. The gyrator is at least partially or fully capable of being integrated on silicon-based substrate.

摘要翻译： 本文介绍了使用回转器的片内发射机/接收机隔离的RF前端。 RF前端被配置为支持全双工通信，并且包括回转器和变压器。 回转器包括金属板和电感器，其被配置为使用霍尔效应将低噪声放大器（LNA）的输入与功率放大器（PA）的输出隔离。 回转器还被配置为将PA的输出与LNA的输入隔离。 回转器至少部分或完全能够集成在硅基基板上。

公开(公告)号：US20130070878A1

公开(公告)日：2013-03-21

申请号：US13613624

申请日：2012-09-13

申请人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/10 ,  H04B1/16

CPC分类号： H04B1/28 ,  H04B1/123

摘要： A method and apparatus is disclosed to effectively frequency translate a filter characterized as a low quality factor (Q) filter, corresponding to a baseband frequency of approximately zero Hertz or to an intermediate frequency (IF), to a filter characterized as a high Q filter at frequencies greater than the baseband frequency or the IF. A downconversion mixer frequency translates a communication signal to the baseband frequency or the IF using a first local oscillator signal to provide a downconverted communication signal. A filter corresponding to the baseband frequency or the IF filters the downconverted communication signal to provide a filtered communication signal. An upconversion mixer frequency translates a communication signal using a second local oscillator signal. The frequency translation by the upconversion mixer, in effect, translates the filter characterization from the low Q filter to the high Q filter at frequencies greater than the baseband frequency or the IF.

摘要翻译： 公开了一种方法和装置，用于将表征为低质量因子（Q）滤波器的滤波器频率转换成对应于近似零赫兹的基带频率或中频（IF）的滤波器，其特征在于高Q滤波器 在大于基带频率或IF的频率处。 下变频混频器使用第一本地振荡器信号将通信信号转换为基带频率或IF，以提供下变频的通信信号。 对应于基带频率的滤波器或IF对经下变频的通信信号进行滤波以提供经滤波的通信信号。 上变频混频器使用第二本地振荡器信号来转换通信信号。 通过上变频混频器进行的频率转换实际上将滤波器特性从低Q滤波器转换为高于基带频率或IF的频率的高Q滤波器。

公开(公告)号：US08923168B2

公开(公告)日：2014-12-30

申请号：US12945954

申请日：2010-11-15

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04L5/14 ,  H04B1/56 ,  H04B1/18 ,  H04B1/04

CPC分类号： H04B1/18 ,  H04B1/0458

摘要： A radio front end includes an antenna tuning unit, a duplexer, a balancing network, and a processing module. The antenna tuning unit is operably coupled to an antenna and operable to tune an operational characteristic of the antenna based on an antenna tuning signal. The duplexer is operably coupled to the antenna tuning unit and operable to provide electrical isolation between an outbound wireless signal and an inbound wireless signal. The balancing network is operably coupled to the duplexer and operable to establish an impedance that substantially matches an impedance of the antenna. The processing module is operable to estimate the impedance of the antenna to produce an estimated antenna impedance and to generate the antenna tuning signal based on the estimated antenna impedance.

摘要翻译： 无线电前端包括天线调谐单元，双工器，平衡网络和处理模块。 天线调谐单元可操作地耦合到天线并且可操作以基于天线调谐信号来调谐天线的操作特性。 双工器可操作地耦合到天线调谐单元并且可操作以在出站无线信号和入站无线信号之间提供电隔离。 平衡网络可操作地耦合到双工器并且可操作以建立基本上匹配天线的阻抗的阻抗。 处理模块可操作以估计天线的阻抗以产生估计的天线阻抗，并且基于估计的天线阻抗来产生天线调谐信号。

公开(公告)号：US08918138B2

公开(公告)日：2014-12-23

申请号：US12806500

申请日：2010-08-13

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04M1/00 ,  H04B1/18 ,  H01L23/60

CPC分类号： H04B1/18 ,  H01L23/60 ,  H01L2924/0002 ,  H01L2924/00

摘要： According to one embodiment, an input control unit to provide isolation and electrostatic discharge (ESD) protection for a circuit in an RF transceiver comprises a switching device coupled between an input of the circuit and ground. The switching device is configured to provide ESD protection while the circuit is activated. The switching device is further configured to ground the input while the circuit is non-activated, thereby concurrently isolating the input and providing ESD protection. A method for providing isolation and ESD protection for a circuit in an RF transceiver comprises activating the circuit, providing ESD protection while the circuit is activated, deactivating the circuit, and coupling an input of the circuit to ground, thereby concurrently isolating the input and providing ESD protection while the circuit is non-activated. The method and switching device can be used to provide isolation and ESD protection to receive bands in the RF transceiver.

摘要翻译： 根据一个实施例，为RF收发器中的电路提供隔离和静电放电（ESD）保护的输入控制单元包括耦合在电路的输入和地之间的开关装置。 开关器件被配置为在电路被激活时提供ESD保护。 开关装置还被配置为在电路未被激活的同时对输入进行接地，从而同时隔离输入并提供ESD保护。 用于为RF收发器中的电路提供隔离和ESD保护的方法包括激活电路，在电路被激活时提供ESD保护，去激活电路，以及将电路的输入耦合到地，从而同时隔离输入并提供 电路未激活时的ESD保护。 该方法和开关装置可用于提供隔离和ESD保护以在RF收发器中接收频带。

公开(公告)号：US08897722B2

公开(公告)日：2014-11-25

申请号：US12567100

申请日：2009-09-25

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/44 ,  H04B1/52 ,  H04B1/18

CPC分类号： H04L5/143 ,  H04B1/04 ,  H04B1/525 ,  H04B2001/0416

摘要： Embodiments of a four-port isolation module are presented herein. In an embodiment, the isolation module includes a step-up autotransformer comprising a first and second winding that are electrically coupled in series at a center node. The first port of the isolation module is configured to couple an antenna to a first end node of the series coupled windings. The second port of the isolation module is configured to couple a balancing network to a second end node of the series coupled windings. The third port is configured to couple a transmit path to the center node. The fourth port is configured to couple a differential receive path across the first end node and the second end node. The isolation module effectively isolates the third port from the fourth port to prevent strong outbound signals received at the third port from saturating an LNA coupled to the fourth port.

摘要翻译： 本文给出了四端口隔离模块的实施例。 在一个实施例中，隔离模块包括升压自耦变压器，其包括在中心节点电耦合的第一和第二绕组。 隔离模块的第一端口被配置为将天线耦合到串联耦合绕组的第一端节点。 隔离模块的第二端口被配置为将平衡网络耦合到串联耦合绕组的第二端节点。 第三端口被配置为将发送路径耦合到中心节点。 第四端口被配置为耦合跨越第一端节点和第二端节点的差分接收路径。 隔离模块有效地将第三端口与第四端口隔离，以防止在第三端口处接收的强大的出站信号使连接到第四端口的LNA饱和。

公开(公告)号：US08599726B2

公开(公告)日：2013-12-03

申请号：US12946447

申请日：2010-11-15

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B7/005

CPC分类号： H04L5/1461 ,  H03F1/56 ,  H03F3/195 ,  H03F2200/294 ,  H03F2200/537 ,  H03H7/40 ,  H04B1/0458 ,  H04B1/10 ,  H04B1/18 ,  H04B1/525 ,  H04B1/581

摘要： A radio front module includes a power amplifier, a duplexer, and a tunable balancing network. The power amplifier is operably coupled to amplify an up-converted signal into an outbound wireless signal. The duplexer is operably coupled to an antenna and operable to provide electrical isolation between the outbound wireless signal and an inbound wireless signal. The tunable balancing network is operable to establish an impedance that substantially matches an impedance of the antenna. The tunable balancing network includes a plurality of capacitive elements, a plurality of resistive elements, and a plurality of low-voltage switching elements operable to, and in accordance with a tuning signal, couple one or more of the plurality of capacitive elements and one or more of the plurality of resistive elements to the duplexer as an impedance balancing load.

摘要翻译： 无线电前端模块包括功率放大器，双工器和可调平衡网络。 功率放大器可操作地耦合以将上变频信号放大到出站无线信号。 双工器可操作地耦合到天线并且可操作以在出站无线信号和入站无线信号之间提供电隔离。 可调平衡网络可操作以建立基本上匹配天线的阻抗的阻抗。 可调平衡网络包括多个电容元件，多个电阻元件和多个低电压开关元件，其可操作以及根据调谐信号耦合多个电容元件中的一个或多个，以及一个或多个 作为阻抗平衡负载的多个电阻元件中的多个到双工器。

公开(公告)号：US08514035B2

公开(公告)日：2013-08-20

申请号：US12727309

申请日：2010-03-19

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H03H11/08 ,  H04B1/38

CPC分类号： H03H11/42 ,  H03H11/32 ,  H03H11/342 ,  H04B5/0093 ,  H04B2001/485

摘要： An RF front-end with on-chip transmitter/receiver isolation using a gyrator is presented herein. The RF front end is configured to support full-duplex communication and includes a gyrator and a transformer. The gyrator includes two transistors that are configured to isolate the input of a low-noise amplifier (LNA) from the output of a power amplifier (PA). The gyrator is further configured to isolate the output of the PA from the input of the LNA. The gyrator is at least partially or fully capable of being integrated on silicon-based substrate.

摘要翻译： 本文介绍了使用回转器的片内发射机/接收机隔离的RF前端。 RF前端被配置为支持全双工通信，并且包括回转器和变压器。 回转器包括被配置为将低噪声放大器（LNA）的输入与功率放大器（PA）的输出隔离的两个晶体管。 回转器还被配置为将PA的输出与LNA的输入隔离。 回转器至少部分或完全能够集成在硅基基板上。

公开(公告)号：US08285241B2

公开(公告)日：2012-10-09

申请号：US12461069

申请日：2009-07-30

申请人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/26

CPC分类号： H04B1/28 ,  H04B1/123

摘要： A method and apparatus is disclosed to effectively frequency translate a filter characterized as a low quality factor (Q) filter corresponding to a baseband frequency of approximately zero Hertz or to an intermediate frequency (IF) to a filter characterized as a high Q filter at frequencies greater than the baseband frequency or the IF. A downconversion mixer is used to frequency translate a communication signal to the baseband frequency or the IF using a first local oscillator signal to provide a downconverted communication signal. A filter characterized as the low Q filter corresponding to the baseband frequency or the IF filters the downconverted communication signal to provide a filtered communication signal. An upconversion mixer is used to frequency translate a communication signal using a second local oscillator signal, the second local oscillator signal being substantially similar in frequency of the first local oscillator signal. The frequency translation by the upconversion mixer, in effect, translates the filter characterization from the low Q filter to the high Q filter at frequencies greater than the baseband frequency or the IF.

摘要翻译： 公开了一种方法和装置，以有效地频率转换滤波器，其特征在于对应于大约零赫兹的基带频率的低质量因子（Q）滤波器或者将中频（IF）调频到以频率为高Q滤波器的滤波器 大于基带频率或IF。 下变频混频器用于使用第一本地振荡器信号将通信信号频率转换为基带频率或IF，以提供经下变频的通信信号。 滤波器，其特征在于对应于基带频率的低Q滤波器或IF对下变频通信信号进行滤波以提供经滤波的通信信号。 使用上变频混频器使用第二本地振荡器信号对通信信号进行频率转换，第二本地振荡器信号在第一本机振荡器信号的频率上基本相似。 通过上变频混频器进行的频率转换实际上将滤波器特性从低Q滤波器转换为高于基带频率或IF的频率的高Q滤波器。