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1. 发明申请

US20080102761A1 System and method for compensation of phase hits 审中-公开
标题翻译：相位补偿的系统和方法
公开(公告)号：US20080102761A1
公开(公告)日：2008-05-01
申请号：US11588681
申请日：2006-10-27
申请人： David C.M. Pham , Frank S. Matsumoto , Youming Qin
发明人： David C.M. Pham , Frank S. Matsumoto , Youming Qin
IPC分类号： H04B1/40
CPC分类号： H03L1/04 , G07F9/105 , G07F17/0078 , H03L7/06
摘要： A frequency synthesizer module with phase hits compensation, comprises an enclosure; a frequency synthesizer within the enclosure; and a heater module including a heater element in thermal communication with the frequency synthesizer for producing heat to adaptively adjust frequency synthesizer temperature. The frequency synthesizer module may be in an ODU and electrically isolated from the heater module. The heater module may include a posistor that varies based on temperature; and a voltage regulator having an input pin for receiving a varying input voltage, an output pin for providing a modifiable output voltage to the heater element for adaptively adjusting the heat generated thereby, and an adjust pin coupled to the posistor for maintaining a substantially constant voltage at the adjust pin. The heater module may heat when below room temperature, heat at less than maximum power when between room temperature and a threshold, and deactivate when above the threshold.
摘要翻译：具有相位匹配补偿的频率合成器模块，包括外壳; 外壳内的频率合成器; 以及加热器模块，其包括与频率合成器热连接的加热器元件，用于产生热量以自适应地调节频率合成器温度。频率合成器模块可以在ODU中并且与加热器模块电隔离。加热器模块可以包括基于温度变化的晶体管; 以及具有用于接收变化的输入电压的输入引脚的电压调节器，用于向加热器元件提供可修改的输出电压以便自适应地调节由此产生的热的输出引脚以及耦合到晶体管的调节引脚，用于维持基本恒定的电压在调节销。加热器模块在低于室温时可能会加热，当室温和阈值之间以小于最大功率的热量加热时，加热器模块可能在阈值以上时停用。

2. 发明申请

US20120108188A1 SYSTEMS AND METHODS FOR IMPROVED POWER YIELD AND LINEARIZATION IN RADIO FREQUENCY TRANSMITTERS 有权
标题翻译：用于改善无线电频率发射机功率和线性化的系统和方法
公开(公告)号：US20120108188A1
公开(公告)日：2012-05-03
申请号：US13277588
申请日：2011-10-20
申请人： Frank MATSUMOTO , Youming Qin , David C.M. Pham
发明人： Frank MATSUMOTO , Youming Qin , David C.M. Pham
IPC分类号： H04B1/04
CPC分类号： H03F1/32 , H03F1/0205 , H03F1/0211 , H03F1/3247 , H03F3/19 , H03F3/21 , H03F3/245 , H03F2200/129 , H03F2200/207 , H03F2200/451 , H04B1/04 , H04B2001/0425
摘要： In one example system, the system comprises a linearizer module, a first upconverter module, a power amplifier module, a signal sampler module, and a downconverter module. The linearizer module may be configured to receive a first intermediate frequency signal and to adjust the first intermediate frequency signal based on a reference signal and a signal based on a second intermediate frequency signal. The first upconverter module may be configured to receive and up-convert a signal based on the adjusted first intermediate frequency signal to a radio frequency signal. The power amplifier module may be configured to receive and amplify a power of a signal based on the radio frequency signal. The signal sampler module may be configured to sample a signal based on the amplified radio frequency signal. The downconverter module may be configured to receive and down-convert a signal based on the sampled radio frequency signal to the second intermediate frequency signal.
摘要翻译：在一个示例系统中，系统包括线性化模块，第一上变频器模块，功率放大器模块，信号采样器模块和下变频器模块。线性化模块可以被配置为接收第一中频信号并且基于参考信号和基于第二中频信号的信号来调整第一中频信号。第一上变频器模块可以被配置为基于经调整的第一中频信号将信号接收和上变频到射频信号。功率放大器模块可以被配置为基于射频信号来接收和放大信号的功率。信号采样器模块可以被配置为基于放大的射频信号对信号进行采样。下变频器模块可以被配置为基于所采样的射频信号将信号接收和下变频到第二中频信号。

3. 发明申请

US20120208477A1 SYSTEMS AND METHODS FOR A RADIO FREQUENCY TRANSMITTER WITH IMPROVED LINEARITY AND POWER OUT UTILIZING PRE-DISTORTION AND A GAN (GALLIUM NITRIDE) POWER AMPLIFIER DEVICE 有权
标题翻译：具有改进的线性和功率放大的无线电频率发射机的系统和方法和使用GAN（氮化镓）功率放大器装置
公开(公告)号：US20120208477A1
公开(公告)日：2012-08-16
申请号：US13348329
申请日：2012-01-11
申请人： Jayesh NATH , Ying Shen , Frank Matsumoto , Yougming Qin , David C.M. Pham
发明人： Jayesh NATH , Ying Shen , Frank Matsumoto , Yougming Qin , David C.M. Pham
IPC分类号： H04B1/04
CPC分类号： H04B1/0475 , H03F1/3241 , H03F1/3247 , H03F1/345 , H03F3/19 , H03F3/245 , H03F3/60 , H03F2200/204 , H03F2200/207 , H03F2200/423 , H04B2001/0425
摘要： Various embodiments provide for systems and methods for increased linear output power of a transmitter. An exemplary wireless communications system for transmitting an input signal comprises a predistorter module, a GaN power amplifier, a coupler, and an antenna. The predistorter module is configured to detect existing distortion by comparing the input signal to a feedback signal and generate a correction signal. The predistorter may adaptively adjust its operation to minimize the existing distortion due to GaN power amplifier nonlinear characteristics. The result is that the GaN power amplifier may send a power signal of improved linearity to the antenna. The coupler is configured to sample the amplified signal from the GaN power amplifier to generate the feedback signal. The antenna is configured to transmit the amplified signal.
摘要翻译：各种实施例提供了用于增加发射机的线性输出功率的系统和方法。用于传输输入信号的示例性无线通信系统包括预失真器模块，GaN功率放大器，耦合器和天线。预失真器模块被配置为通过将输入信号与反馈信号进行比较来检测现有失真并产生校正信号。预失真器可以自适应地调整其操作，以使由于GaN功率放大器非线性特性导致的现有失真最小化。结果是GaN功率放大器可以向天线发送具有改进的线性度的功率信号。耦合器被配置为对来自GaN功率放大器的放大信号进行采样以产生反馈信号。天线被配置为发送放大的信号。

4. 发明申请

US20120075040A1 Systems and Methods of a Rectangular-to-Circular Waveguide Transition 有权
标题翻译：矩形到圆形波导转换的系统和方法
公开(公告)号：US20120075040A1
公开(公告)日：2012-03-29
申请号：US13221781
申请日：2011-08-30
申请人： Cuong Nguyen , David C.M. Pham , Jayesh Nath , John Ruiz , Thuan Huynh
发明人： Cuong Nguyen , David C.M. Pham , Jayesh Nath , John Ruiz , Thuan Huynh
IPC分类号： H01P1/16
CPC分类号： H01P1/162 , H01P5/082
摘要： Systems and methods for a filtering wave energy using a rectangular-to-circular waveguide transition are discussed herein. An exemplary system comprises a rectangular-to-circular waveguide transition and a filter card. The rectangular-to-circular waveguide transition may include a front section and a back section opposite the front section, the rectangular-to-circular waveguide transition defining a circular hole extending from the front section of the rectangular-to-circular waveguide transition through the back section, the rectangular-to-circular waveguide transition further having a first arcuate region on the face of the transition, the first arcuate region defining a first cavity extending from the circular hole through the first arcuate region, the rectangular-to-circular waveguide transition also having a second arcuate region defining a second cavity opposite the first cavity, the second cavity extending from the circular hole through the second arcuate region. The filter card may be configured to be placed across the circular hole of the rectangular-to-circular waveguide transition.
摘要翻译：本文讨论了使用矩形到圆形波导过渡的滤波能量的系统和方法。示例性系统包括矩形到圆形的波导过渡和过滤卡。矩形到圆形的波导过渡可以包括前部和与前部相对的后部，矩形到圆形的波导过渡限定了从矩形到圆形的波导过渡的前部延伸的圆形孔所述矩形到圆形波导变换器还具有在所述过渡面的第一弧形区域，所述第一弧形区域限定从所述圆形孔延伸穿过所述第一弧形区域的所述矩形到圆形波导过渡还具有限定与第一腔相对的第二腔的第二弓形区，第二腔从圆形孔延伸穿过第二弧形区。过滤卡可以被配置为跨过矩形到圆形波导过渡的圆形孔。

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