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1. 发明授权

US4426630A Electronically tunable band reject filter 失效
标题翻译：电可调波段滤波器
公开(公告)号：US4426630A
公开(公告)日：1984-01-17
申请号：US334957
申请日：1981-12-28
申请人： Andrew F. Folkmann
发明人： Andrew F. Folkmann
IPC分类号： H03H11/04 , H03H7/12 , H01P1/20
CPC分类号： H03H11/04
摘要： An electronically tunable band reject filter rejects only frequencies of a signal that are in the reject band around its center frequency. The band reject filter includes an input directional coupler for sampling of the signal that is to be filtered and provides a first and second signal thereby. The first signal is filtered by a bandpass filter that passes only frequencies of the signal that are around the center frequency of the bandpass filter. An output directional coupler combines the second signal with the filtered signal and obtains on a difference port the difference between the second signal and the filtered signal. The frequencies of the signal that are centered around the center frequency of the bandpass filter are thereby rejected.
摘要翻译：电子可调谐带阻滤波器仅拒绝在其中心频率周围的拒绝频带中的信号的频率。带阻滤波器包括用于对要滤波的信号进行采样并由此提供第一和第二信号的输入定向耦合器。第一信号被带通滤波器滤波，该带通滤波器仅通过围绕带通滤波器的中心频率的信号的频率。输出定向耦合器将第二信号与经滤波的信号相结合，并且在差分端口上获得第二信号和滤波信号之间的差值。因此，阻止了以带通滤波器的中心频率为中心的信号的频率。

2. 发明授权

US08952710B2 Pulsed behavior modeling with steady state average conditions 有权
标题翻译：脉冲行为建模与稳态平均条件
公开(公告)号：US08952710B2
公开(公告)日：2015-02-10
申请号：US13548283
申请日：2012-07-13
申请人： James M. Retz , Andrew F. Folkmann , Jean-Frederic Chiron
发明人： James M. Retz , Andrew F. Folkmann , Jean-Frederic Chiron
IPC分类号： G01R31/28
CPC分类号： G01R31/28 , G01R31/2834 , G01R31/2839
摘要： A method for pulsed behavior modeling of a device under test (DUT) using steady state conditions is disclosed. The method includes providing an automated test system (ATS) programmed to capture at least one behavior of the DUT. The ATS then generates a DUT input power pulse that transitions from a predetermined steady state level to a predetermined pulse level and back to the predetermined steady state level. At least one behavior of the DUT is then captured by the ATS while the input power is at the predetermined pulse level. The ATS then steps the predetermined pulse level to a different predetermined pulse level, and the above steps are repeated until a range of predetermined pulse levels is swept. The ATS then steps the predetermined steady state level to a different steady state level, and the above steps are repeated until a range of predetermined steady state levels is swept.
摘要翻译：公开了一种使用稳态条件测试被测器件（DUT）的脉冲行为建模方法。该方法包括提供被编程为捕获DUT的至少一个行为的自动测试系统（ATS）。 ATS然后产生从预定稳态电平转换到预定脉冲电平并返回到预定稳态电平的DUT输入功率脉冲。然后，当输入功率处于预定脉冲电平时，由ATS捕获DUT的至少一个行为。然后，ATS将预定脉冲电平调整到不同的预定脉冲电平，并重复上述步骤，直到扫描预定脉冲电平的范围。 ATS然后将预定的稳态电平步进到不同的稳态电平，并重复上述步骤直到扫描预定的稳态电平的范围。

3. 发明授权

US08570913B2 De-multiplexing a radio frequency input signal using output transformer circuitry 有权
标题翻译：使用输出变压器电路解复用射频输入信号
公开(公告)号：US08570913B2
公开(公告)日：2013-10-29
申请号：US12966707
申请日：2010-12-13
申请人： Nadim Khlat , Ruediger Bauder , Andrew F. Folkmann
发明人： Nadim Khlat , Ruediger Bauder , Andrew F. Folkmann
IPC分类号： H04B7/005 , H04B7/00 , H04B1/04 , H04L12/50
CPC分类号： H04L5/14 , H04B1/0483
摘要： The present disclosure relates to de-multiplexing at least one RF input signal feeding RF power amplifier circuitry to create multiple de-multiplexed RF output signals, which may be used to provide RF transmit signals in an RF communications system. Output transformer circuitry is coupled to outputs from the RF power amplifier circuitry to provide the de-multiplexed RF output signals, which may support multiple modes, multiple frequency bands, or both. The de-multiplexed RF output signals may be used in place of RF switching elements in certain embodiments. As a result, RF front-end switching circuitry in the RF communications system may be simplified, thereby reducing insertion losses, reducing costs, reducing size, or any combination thereof. Additionally, the output transformer circuitry may provide load line transformation, output transistor biasing, or both to the RF power amplifier circuitry.
摘要翻译：本公开涉及对至少一个馈送RF功率放大器电路的RF输入信号进行解复用以产生多个解复用RF输出信号，其可用于在RF通信系统中提供RF发射信号。输出变压器电路耦合到来自RF功率放大器电路的输出，以提供解复用的RF输出信号，其可以支持多种模式，多个频带或两者。在某些实施例中，解复用的RF输出信号可以用于代替RF开关元件。结果，可以简化RF通信系统中的RF前端切换电路，从而减少插入损耗，降低成本，减小尺寸或其任何组合。此外，输出变压器电路可以向RF功率放大器电路提供负载线变换，输出晶体管偏置或两者。

4. 发明授权

US07570932B1 Dual mode quadrature radio frequency power amplifier 有权
标题翻译：双模正交射频功率放大器
公开(公告)号：US07570932B1
公开(公告)日：2009-08-04
申请号：US11548907
申请日：2006-10-12
申请人： Andrew F. Folkmann
发明人： Andrew F. Folkmann
IPC分类号： H04B1/04 , H03F3/68
CPC分类号： H03F1/32 , H03F1/02 , H03F1/0277 , H03F1/56 , H03F3/24 , H03F2200/336 , H03F2200/451 , H04B1/0483 , H04B2001/045
摘要： The present invention is a dual mode quadrature RF power amplifier system that is efficient and meets linearity requirements in both modes of operation. In a high power mode of operation, the power amplifier functions in a traditional manner, wherein both quadrature amplifier legs feed a quadrature power combiner to provide a combined RF output signal at an RF output. Any imbalanced signals are routed to an isolation output. In a low power mode of operation, one quadrature amplifier leg is disabled, which would normally cause the signal being fed from the enabled amplifier leg to be split between the two quadrature outputs; however, the impedance at the isolation output is shifted to reflect the isolation output signal back into the quadrature combiner to appear at the RF output. The impedance shift at the isolation output causes an impedance increase at the active input, thereby lowering output power.
摘要翻译：本发明是双模式正交RF功率放大器系统，其在两种工作模式下都是高效的并且满足线性要求。在高功率工作模式下，功率放大器以传统方式工作，其中正交放大器支路馈送正交功率组合器以在RF输出端提供组合RF输出信号。任何不平衡信号被路由到隔离输出。在低功率工作模式下，禁用一个正交放大器支路，这通常会使得从使能的放大器支路馈送的信号在两个正交输出之间分配; 然而，隔离输出端的阻抗被移动以将隔离输出信号反射回正交组合器以出现在RF输出端。隔离输出端的阻抗偏移导致有源输入端的阻抗增加，从而降低输出功率。

5. 发明授权

US08626091B2 Envelope tracking with variable compression 有权
标题翻译：包络跟踪与可变压缩
公开(公告)号：US08626091B2
公开(公告)日：2014-01-07
申请号：US13550060
申请日：2012-07-16
申请人： Nadim Khlat , Andrew F. Folkmann , James M. Retz
发明人： Nadim Khlat , Andrew F. Folkmann , James M. Retz
IPC分类号： H04B1/04
CPC分类号： H03G3/004 , H03F1/0216
摘要： Radio frequency (RF) transmitter circuitry, which includes an envelope tracking power supply and an RF power amplifier (PA), is disclosed. The RF PA operates in either a first operating mode or a second operating mode, such that selection of the operating mode is based on compression tolerance criteria. During the first operating mode, the RF PA receives and amplifies an RF input signal using a first compression level. During the second operating mode, the RF PA receives and amplifies the RF input signal using a second compression level, which is greater than the first compression level. The envelope tracking power supply provides an envelope power supply signal to the RF PA. The envelope power supply signal provides power for amplification.
摘要翻译：公开了包括信封跟踪电源和RF功率放大器（PA）的射频（RF）发射机电路。 RF PA在第一操作模式或第二操作模式中操作，使得操作模式的选择基于压缩容限标准。在第一操作模式期间，RF PA使用第一压缩级别接收并放大RF输入信号。在第二操作模式期间，RF PA使用大于第一压缩级别的第二压缩级别接收并放大RF输入信号。信封跟踪电源为RF PA提供信封电源信号。信封电源信号提供放大功率。

6. 发明申请

US20130181730A1 PULSED BEHAVIOR MODELING WITH STEADY STATE AVERAGE CONDITIONS 有权
标题翻译：具有稳定状态平均条件的脉冲行为建模
公开(公告)号：US20130181730A1
公开(公告)日：2013-07-18
申请号：US13548283
申请日：2012-07-13
申请人： James M. Retz , Andrew F. Folkmann , Jean-Frederic Chiron
发明人： James M. Retz , Andrew F. Folkmann , Jean-Frederic Chiron
IPC分类号： G01R31/28
CPC分类号： G01R31/28 , G01R31/2834 , G01R31/2839
摘要： A method for pulsed behavior modeling of a device under test (DUT) using steady state conditions is disclosed. The method includes providing an automated test system (ATS) programmed to capture at least one behavior of the DUT. The ATS then generates a DUT input power pulse that transitions from a predetermined steady state level to a predetermined pulse level and back to the predetermined steady state level. At least one behavior of the DUT is then captured by the ATS while the input power is at the predetermined pulse level. The ATS then steps the predetermined pulse level to a different predetermined pulse level, and the above steps are repeated until a range of predetermined pulse levels is swept. The ATS then steps the predetermined steady state level to a different steady state level, and the above steps are repeated until a range of predetermined steady state levels is swept.
摘要翻译：公开了一种使用稳态条件测试被测器件（DUT）的脉冲行为建模方法。该方法包括提供被编程为捕获DUT的至少一个行为的自动测试系统（ATS）。 ATS然后产生从预定稳态电平转换到预定脉冲电平并返回到预定稳态电平的DUT输入功率脉冲。然后，当输入功率处于预定脉冲电平时，由ATS捕获DUT的至少一个行为。然后，ATS将预定脉冲电平调整到不同的预定脉冲电平，并重复上述步骤，直到扫描预定脉冲电平的范围。 ATS然后将预定的稳态电平步进到不同的稳态电平，并重复上述步骤直到扫描预定的稳态电平的范围。

7. 发明授权

US07440734B1 Active quadrature radio frequency power detector 有权
标题翻译：有源正交射频功率检测器
公开(公告)号：US07440734B1
公开(公告)日：2008-10-21
申请号：US11348104
申请日：2006-02-06
申请人： David E. Jones , Andrew F. Folkmann
发明人： David E. Jones , Andrew F. Folkmann
IPC分类号： H03C1/62 , H04B17/00
CPC分类号： G01R21/01 , H03G3/3042
摘要： The present invention is a quadrature RF power detector circuit, which is used in conjunction with a quadrature RF power amplifier to detect and combine RF signals from an in-phase amplifier leg and from a quadrature-phase amplifier leg to provide an RF power detection signal. The quadrature RF power detector circuit includes an emitter follower amplifier for each leg of the quadrature RF power amplifier and may include doubler circuitry to detect both half-cycles of an RF signal. The emitter follower detector provides power detection with minimal DC current and without significant RF loading at the point of detection, such as an RF interstage. This balanced detector also provides more accurate power detection under high VSWR conditions due to the quadrature action minimizing peaks and valleys in the detected voltage.
摘要翻译：本发明是正交RF功率检测器电路，其与正交RF功率放大器结合使用以检测和组合来自同相放大器支路和正交相位放大器支路的RF信号，以提供RF功率检测信号。正交RF功率检测器电路包括用于正交RF功率放大器的每个支路的射极跟随放大器，并且可以包括检测RF信号的两个半周期的倍频电路。射极跟踪器检测器提供功率检测，具有最小的直流电流，并且在检测点（例如RF级间）没有显着的RF负载。这种平衡检测器在高VSWR条件下也能提供更准确的功率检测，因为正交作用使检测到的电压中的峰值和谷值最小化。

8. 发明授权

US09263996B2 Quasi iso-gain supply voltage function for envelope tracking systems 有权
标题翻译：用于包络跟踪系统的准等增益电源功能
公开(公告)号：US09263996B2
公开(公告)日：2016-02-16
申请号：US13552768
申请日：2012-07-19
申请人： Andrew F. Folkmann , James M. Retz , Nadim Khlat , Jean-Frederic Chiron
发明人： Andrew F. Folkmann , James M. Retz , Nadim Khlat , Jean-Frederic Chiron
IPC分类号： G06F19/00 , H03F3/189 , H03F1/02
CPC分类号： H03F3/189 , H03F1/0222 , H03F2200/411
摘要： A method of defining a quasi iso-gain supply voltage function for an envelope tracking system is disclosed. The method includes a step of capturing iso-gain supply voltage values versus power values for a device under test (DUT). Other steps involve locating a minimum iso-gain supply voltage value, and then replacing the iso-gain supply voltage values with the minimum iso-gain supply voltage value for corresponding output power values that are less than an output power value corresponding to the minimum iso-gain supply voltage value. The method further includes a step of generating a look-up table (LUT) of iso-gain supply voltage values as a function of input power for the DUT after the step of replacing the iso-gain supply voltage values with the minimum iso-gain supply voltage value for corresponding output power values that are less than an output power value corresponding to the minimum iso-gain supply voltage value.
摘要翻译：公开了一种定义用于包络跟踪系统的准等增益电源电压功能的方法。该方法包括捕获等效增益电源电压值与被测器件（DUT）的功率值的步骤。其他步骤包括定位最小等电位增益电源电压值，然后用对应于最小等效电流的输出功率值的相应输出功率值的最小等效增益电源电压值替换等增益电源电压值 - 电源电压值。该方法还包括以下步骤：在以等于最小等效增益替换等增益电源电压值的步骤之后，产生作为DUT的输入功率的函数的等增益电源电压值的查找表（LUT）对于相应的输出功率值的电源电压值小于对应于最小等
差增益电源电压值的输出功率值。

9. 发明申请

US20110310775A1 DE-MULTIPLEXING A RADIO FREQUENCY INPUT SIGNAL USING OUTPUT TRANSFORMER CIRCUITRY 有权
标题翻译：使用输出变压器电路解复用无线电频率输入信号
公开(公告)号：US20110310775A1
公开(公告)日：2011-12-22
申请号：US12966707
申请日：2010-12-13
申请人： Nadim Khlat , Ruediger Bauder , Andrew F. Folkmann
发明人： Nadim Khlat , Ruediger Bauder , Andrew F. Folkmann
IPC分类号： H04B7/005
CPC分类号： H04L5/14 , H04B1/0483
摘要： The present disclosure relates to de-multiplexing at least one RF input signal feeding RF power amplifier circuitry to create multiple de-multiplexed RF output signals, which may be used to provide RF transmit signals in an RF communications system. Output transformer circuitry is coupled to outputs from the RF power amplifier circuitry to provide the de-multiplexed RF output signals, which may support multiple modes, multiple frequency bands, or both. The de-multiplexed RF output signals may be used in place of RF switching elements in certain embodiments. As a result, RF front-end switching circuitry in the RF communications system may be simplified, thereby reducing insertion losses, reducing costs, reducing size, or any combination thereof. Additionally, the output transformer circuitry may provide load line transformation, output transistor biasing, or both to the RF power amplifier circuitry.
摘要翻译：本公开涉及对至少一个馈送RF功率放大器电路的RF输入信号进行解复用以创建多个解复用RF输出信号，其可用于在RF通信系统中提供RF发射信号。输出变压器电路耦合到来自RF功率放大器电路的输出，以提供解复用的RF输出信号，其可以支持多种模式，多个频带或两者。在某些实施例中，解复用的RF输出信号可以用于代替RF开关元件。结果，可以简化RF通信系统中的RF前端切换电路，从而减少插入损耗，降低成本，减小尺寸或其任何组合。此外，输出变压器电路可以向RF功率放大器电路提供负载线变换，输出晶体管偏置或两者。

10. 发明授权

US07656964B1 Forward and reverse VSWR insensitive power detection using phase shifting and harmonic filtering 有权
标题翻译：使用相移和谐波滤波的正向和反向VSWR不敏感功率检测
公开(公告)号：US07656964B1
公开(公告)日：2010-02-02
申请号：US11626514
申请日：2007-01-24
申请人： David DeCoste , Andrew F. Folkmann , Derek Schooley
发明人： David DeCoste , Andrew F. Folkmann , Derek Schooley
IPC分类号： H04L25/49 , H03F1/26 , H04B1/04
CPC分类号： H04B1/0466 , H03F3/24 , H03F2200/105 , H04B17/21 , H04B17/327 , H04B2001/0416 , H04L25/49
摘要： A system for detecting both forward and reverse power of a power amplifier in the presence of harmonics created by the power amplifier is provided. A forward power detection system receives detection signals from an in-phase amplifier leg and a quadrature-phase amplifier leg of the power amplifier. The forward power detection system applies a phase shift to the detection signals such that forward components of the detection signals are essentially in-phase, and reverse components of the detection signals are essentially 180 degrees out-of-phase. The phase shifted detection signals are then combined and filtered to provide a signal indicative of forward power. In a similar fashion, a reverse power detection system applies a phase shift to the detection signals to provide a signal indicative of reverse power.
摘要翻译：提供一种用于在存在由功率放大器产生的谐波的情况下检测功率放大器的正向和反向功率的系统。正向功率检测系统从功率放大器的同相放大器支路和正交相位放大器支路接收检测信号。正向功率检测系统对检测信号施加相移，使得检测信号的正向分量基本上是同相的，并且检测信号的反向分量基本上是180度异相。然后将相移的检测信号组合和滤波，以提供表示正向功率的信号。以类似的方式，反向功率检测系统对检测信号施加相移以提供表示反向功率的信号。

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