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    • 3. 发明授权
    • System for setting reference reactance for vector corrected measurements
    • 用于设置向量校正测量的参考电抗系统
    • US4858160A
    • 1989-08-15
    • US169844
    • 1988-03-18
    • Eric W. StridKeith E. Jones
    • Eric W. StridKeith E. Jones
    • G01R27/04G01R35/00
    • G01R27/04G01R35/005
    • A system for calibrating vector corrected electrical measurements to adjust for distortion due to reactance in the measuring circuit, particularly that caused by variable positioning of a circuit element, such as probe or coupling. Initial error factors for directivity, source match, and frequency response, respectively, normally calculated from assumed reflection coefficients of respective primary impedance standards, are adjusted to correct for such reactance. Reflection coefficient measurements (magnitude and phase) of a further impedance standard, different from the primary standards, are obtained at multiple frequencies and corrected by the initial error factors. The corrected magnitude and phase measurements of the further impedance standard are compared with theoretical magnitude and phase values which very linearly with frequency, and the initial error factors are adjusted so as to minimize any deviation of the corrected measurements from the linear values. Thereafter, by positioning the probe or other circuit element relative to a device under test substantially identically to its previous placement relative to the further impedance standard, the adjusted error factors can be used to obtain corrected measurements with minimized magnitude and phase errors due to reactance.
    • 5. 发明授权
    • High-frequency active probe having replaceable contact needles
    • 高频有源探头具有可更换的接触针
    • US5006793A
    • 1991-04-09
    • US364091
    • 1989-06-08
    • K. Reed GleasonKeith E. Jones
    • K. Reed GleasonKeith E. Jones
    • G01R1/067
    • G01R1/06772
    • A high-frequency probe comprising a semirigid coaxial line which terminates in an active circuit assembly. The coaxial line's outer conductor is connected to a box while its inner conductor is connected to an active circuit chip. A signal contact needle is attached to the active circuit chip and extends linearly with the coaxial line. The signal needle is held in place with a mass of epoxy filled with silica microballoons, providing a low-capacitance mount.A ground contact needle is connected to a wiper which contacts the box, thus providing a direct, and short, path between the coaxial line's outer conductor and the ground contact needle.
    • 一种高频探头,包括终止在有源电路组件中的半刚性同轴线。 同轴线的外部导体连接到盒子,而其内部导体连接到有源电路芯片。 信号接触针连接到有源电路芯片并与同轴线线性地延伸。 信号针固定在充满硅胶微球的环氧树脂块上,提供了低电容安装。 地面接触针连接到与盒子接触的擦拭器,从而在同轴线的外导体和接地针之间提供直接且短的路径。