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    • 1. 发明授权
    • Cavity oscillator with undesired mode absorbing waveguides for linear FM
    • 具有不想要的模式吸收波导的腔振荡器用于线性FM
    • US4542352A
    • 1985-09-17
    • US505568
    • 1983-06-17
    • Francis R. Yester, Jr.Paul H. GailusEdward V. Louis
    • Francis R. Yester, Jr.Paul H. GailusEdward V. Louis
    • H03B9/14H03C3/22H03B5/18H03B7/14H03C3/08H03C3/20
    • H03B9/141H03C3/22H03B2200/007
    • A modulated elongate cavity oscillator with minimized modulation nonlinearities includes a first cavity having dimensions which determine the fundamental resonant frequency of the oscillator, a gain element disposed in said first cavity that provides amplification to sustain oscillation, and a varactor diode disposed in said first cavity for modulating the fundamental frequency. A first waveguide is coupled to the first cavity for absorbing modes higher than the mode of the fundamental frequency which have an electric field maxima concurrent with the longitudinal center line of the first cavity. A second waveguide is coupled to the first cavity for absorbing modes higher than the mode of fundamental frequency which have an electric field minima concurrent with the longitudinal center line of the first cavity, whereby the first and second waveguides provide effective attenuation of higher order modes such that modulation nonlinearities due to the existence of higher order modes are substantially eliminated.
    • 具有最小调制非线性的调制细长腔振荡器包括具有确定振荡器的基本共振频率的尺寸的第一空腔,设置在所述第一腔中的增益元件,其提供放大以维持振荡,以及设置在所述第一腔中的变容二极管, 调制基频。 第一波导耦合到第一腔,用于吸收比基频的模式高的模式,其具有与第一腔的纵向中心线同时最大的电场。 第二波导耦合到第一腔,用于吸收高于基频模式的模式,其具有与第一腔的纵向中心线同时最小的电场,由此第一和第二波导提供有效衰减高阶模, 基本上消除了由于高阶模式的存在引起的调制非线性。
    • 2. 发明授权
    • Method and apparatus for enhancing an operating characteristic of a
radio transmitter
    • 用于增强无线电发射机的操作特性的方法和装置
    • US5564086A
    • 1996-10-08
    • US158551
    • 1993-11-29
    • Lawrence F. CyganPaul H. GailusWilliam J. TurneyFrancis R. Yester, Jr.
    • Lawrence F. CyganPaul H. GailusWilliam J. TurneyFrancis R. Yester, Jr.
    • H04B1/04
    • H04B1/0458
    • In a radio transmitter (100) that includes a power amplifier (104) and an antenna (106), a method for enhancing an operating characteristic of the radio transmitter (100) can be accomplished in the following manner. The power amplifier (104) provides a signal (113) to a variable matching network (111), wherein the signal (113) comprises energy to be radiated by the antenna (106). The variable matching network (111) couples the signal (113) to a sampler (112) that is operably coupled to an output of the variable matching network (111 ) and the antenna (106). The sampler (112) samples a forward component (114) and a reflected component (115) of the signal (113). The radio transmitter (100) processes the sampled forward and reflected components (116, 118) to produce a feedback control signal (120). The feedback control signal (120) is used to adjust the variable matching network (111 ), such that an operating characteristic of the radio transmitter (100) is enhanced.
    • 在包括功率放大器(104)和天线(106)的无线电发射机(100)中,可以以下列方式实现增强无线电发射机(100)的工作特性的方法。 功率放大器(104)向可变匹配网络(111)提供信号(113),其中信号(113)包括由天线(106)辐射的能量。 可变匹配网络(111)将信号(113)耦合到可操作地耦合到可变匹配网络(111)和天线(106)的输出的采样器(112)。 采样器(112)对信号(113)的正向分量(114)和反射分量(115)进行采样。 无线电发射机(100)处理采样的正向和反射分量(116,118)以产生反馈控制信号(120)。 反馈控制信号(120)用于调整可变匹配网络(111),使得无线电发射机(100)的工作特性得到增强。
    • 8. 发明授权
    • System and method for performing baseband phase shifting in a Cartesian feedback system
    • 在笛卡尔反馈系统中执行基带相移的系统和方法
    • US07787565B2
    • 2010-08-31
    • US11743746
    • 2007-05-03
    • Joshua E. DorevitchJohn J. BozekiPaul H. GailusMark Rozental
    • Joshua E. DorevitchJohn J. BozekiPaul H. GailusMark Rozental
    • H04L1/02H04L27/20
    • H04L27/364H04L2027/0018
    • A system and method for performing baseband phase shifting in a Cartesian feedback system includes a forward path for receiving an input baseband signal having two components, and performing up-conversion to output a RF signal; a power amplifier for amplifying the RF signal output from the forward path; and a feedback path for down-converting at least a sample of the output from the power amplifier to a feedback baseband signal comprising two components, and providing the feedback baseband signal to the forward path in order to be summed with the input baseband signal at a summing junction and before the loop filter. The forward path includes a baseband phase shifter for adjusting the baseband signal output from the summing junction in order to compensate for any phase shifts induced in the system.
    • 用于在笛卡尔反馈系统中执行基带相移的系统和方法包括用于接收具有两个分量的输入基带信号的前向路径,并执行上变频以输出RF信号; 用于放大从前向路径输出的RF信号的功率放大器; 以及反馈路径,用于将来自功率放大器的输出的至少一个采样的至少一个样本降级为包括两个分量的反馈基带信号,并将反馈基带信号提供给前向路径,以便将其与输入基带信号相加 求和结点和环路滤波器之前。 正向路径包括基带移相器,用于调整从求和结点输出的基带信号,以便补偿系统中引起的任何相移。