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    DIRECTIONAL COUPLER FOR ACCURATE POWER DETECTION
    52.
    发明申请
    DIRECTIONAL COUPLER FOR ACCURATE POWER DETECTION 有权
    用于精确功率检测的方向耦合器

    公开(公告)号：US20070296397A1

    公开(公告)日：2007-12-27

    申请号：US11475783

    申请日：2006-06-27

    Applicant: Ping Li

    Inventor： Ping Li

    IPC: G01R23/04

    CPC classification number: H01P5/184 ,  G01R21/01

    Abstract: A power detection system implemented using a pair of directional couplers and a transmission line (or equivalent) disposed between the directional couplers, wherein the transmission line (or equivalent) provides a 90° phase shift between the directional couplers. Accurate power detection is provided by combining the powers detected at each of the directional couplers, whereby the combined power is independent of load phase. The total power in the forward case is given by Pc1=2*Pf*C, where Pf is the forward power and C is the coupling coefficient the directional couplers. The total power in the reflected case is given by Pc1=2*Pf*C*(ρ2+D2), where Pf is the forward power, C is the coupling coefficient of said directional couplers, ρ is the reflection coefficient, and D is the directivity of the directional couplers.

    Abstract translation: 使用一对定向耦合器和设置在定向耦合器之间的传输线（或等效物体）实现的功率检测系统，其中传输线（或等效物）在定向耦合器之间提供90°的相移。 通过组合在每个定向耦合器处检测到的功率来提供精确的功率检测，由此组合的功率独立于负载相位。 正向情况下的总功率由下式给出：其中P 是正向功率，C 是耦合系数的定向耦合器。 反射情况下的总功率由下式给出：P C *（R 2 O 2 + D 2） ），其中P 是正向功率，C是所述定向耦合器的耦合系数，rho是反射系数，D是定向耦合器的方向性。

    Apparatus for measuring an RF parameter
    56.
    发明授权
    Apparatus for measuring an RF parameter 失效
    用于测量RF参数的装置

    公开(公告)号：US5726566A

    公开(公告)日：1998-03-10

    申请号：US509683

    申请日：1995-07-31

    Applicant: Leendert B. Quist ,  Franciscus J. Frielink

    Inventor： Leendert B. Quist ,  Franciscus J. Frielink

    IPC: G01R29/08 ,  G01R1/04 ,  G01R1/06 ,  G01R1/067 ,  G01R1/20 ,  G01R21/01 ,  G01R27/04 ,  G01R31/28 ,  G01R31/22

    CPC classification number: G01R1/06772 ,  G01R31/2822 ,  G01R21/01

    Abstract: In apparatus for measuring the output power an RF transmitter stage (34) connected to an antenna (44) via a quarter wavelength stripline (38), a manual probe (20) is applied connect the output of the transmitter stage to a power meter (24) and connect the output end of the stripline (38) to ground. Thus, RF signals which were passed to the antenna (44) are switched to the power meter (24). All the circuitry including the antenna (44) is mounted on a printed circuit board (60) disposed within a housing (14) which has an aperture (18) to enable the probe (20) to be inserted. By providing a suitable meter, parameters other than RF power can be measured.

    Abstract translation: 在用于通过四分之一波长带状线（38）测量连接到天线（44）的RF发射器级（34）的输出功率的装置中，应用手动探针（20）将发射器级的输出连接到功率计（ 24）并将带状线（38）的输出端连接到地。 因此，传递到天线（44）的RF信号被切换到功率计（24）。 包括天线（44）的所有电路安装在布置在具有孔（18）的壳体（14）内的印刷电路板（60）上，以使探针（20）能够被插入。 通过提供合适的仪表，可以测量射频功率以外的参数。

    Bandwidth substitution method and system for absolute measurement of power at all radio frequencies
    57.
    发明授权
    Bandwidth substitution method and system for absolute measurement of power at all radio frequencies 失效
    所有射频功率绝对测量的带宽替代方法和系统

    公开(公告)号：US4104587A

    公开(公告)日：1978-08-01

    申请号：US692270

    申请日：1976-06-03

    Applicant: Abraham Singer ,  Jan M. Minkowski

    Inventor： Abraham Singer ,  Jan M. Minkowski

    IPC: G01R21/01 ,  G01R21/00

    CPC classification number: G01R21/01

    Abstract: A highly sensitive method and system for making absolute measurements of er at all radio frequencies is described. This method surmounts the primary shortcoming of the other existing methods in that it permits absolute measurement of power at all radio frequencies, whereas all other methods except one, viz, the so-called incremental method, (described in our co-pending application), are inherently frequency limited, with the current upper limit being about 75 GHz. This major advantage stems from the fact that this method utilizes a direct comparison of the unknown rf power with a primary standard, whereas the other methods (with the exception of the incremental method) require a conversion of the power to heat before making the comparison. The main advantage of this method over the incremental method is that it has much higher sensitivity, permitting absolute measurement of rf power to be made down to about -100 dBm, as compared with only about -10 dBm for the incremental method. An additional advantage of this method is that it permits the measurement of noise as well as coherent rf power, whereas the incremental method is valid only for the case of coherent rf.

    Abstract translation: 描述了一种用于在所有无线电频率下对功率进行绝对测量的高灵敏度方法和系统。 这种方法克服了其他现有方法的主要缺点，因为它允许在所有无线电频率下绝对测量功率，而除一个外的所有其他方法，即所谓的增量方法（在我们的共同未决申请中描述） 固有的频率受限，当前上限约为75 GHz。 这个主要优点来自于这种方法利用未知射频功率与主要标准的直接比较，而在进行比较之前，其他方法（增量方法除外）需要将功率转换为热量。 该方法与增量方法的主要优点是具有更高的灵敏度，允许将rf功率的绝对测量降低到约-100dBm，而对于增量方法仅为约-10dBm。 该方法的另一个优点是它允许测量噪声以及相干射频功率，而增量方法仅对于相干rf的情况才有效。

    Field strength meter
    58.
    发明授权
    Field strength meter 失效
    场强计

    公开(公告)号：US3996880A

    公开(公告)日：1976-12-14

    申请号：US599374

    申请日：1975-07-28

    Applicant: Jack D. Cauldwell

    Inventor： Jack D. Cauldwell

    IPC: G01R1/08 ,  G01R15/00 ,  G01R19/00 ,  G01R21/01 ,  H04N17/00 ,  G09F9/00

    CPC classification number: G01R21/01 ,  G01R1/08 ,  H04N17/00 ,  G01R15/002

    Abstract: A signal strength meter indicates signal level directly in dBmV. The signal under test is attenuated to a level which centers a meter indicator, and the attenuator movement is translated into numerical direct reading information of signal level. Push button switches select a channel for testing, and each switch incorporates gain compensation for the frequency of the signal to be tested. Within each channel the operator can select between audio and video carrier frequency.

    Abstract translation: 信号强度表直接以dBmV表示信号电平。 被测信号被衰减到以仪表指示器为中心的水平，衰减器运动被转换成信号电平的数字直读信息。 按钮开关选择一个通道进行测试，每个开关都会对待测信号的频率进行增益补偿。 在每个通道内，操作者可以在音频和视频载波频率之间进行选择。

    APPARATUS AND METHOD TO MEASURE AC POWER
    60.
    发明申请
    APPARATUS AND METHOD TO MEASURE AC POWER 审中-公开

    公开(公告)号：US20180143228A1

    公开(公告)日：2018-05-24

    申请号：US15618248

    申请日：2017-06-09

    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.

    Inventor： Joon Hyung LIM

    IPC: G01R21/133 ,  H03M1/12

    CPC classification number: G01R21/133 ,  G01R21/01 ,  H03M1/1245

    Abstract: An apparatus and method thereof are described to measure alternating current (AC) power, including: an AC voltage measurement circuit, an in-phase/quadrature (I/Q) direct down converter, an analog/digital converter, and an AC power calculator. The AC voltage measurement circuit is configured to measure first and second AC positive voltages and first and second AC negative voltages from an AC voltage source. The I/Q direct down converter is configured to directly convert each of the first and second AC positive voltages and the first and second AC negative voltages into an I-signal and a Q-signal orthogonal to each other using down conversion. The analog/digital converter is configured to convert the I-signal and the Q-signal into I-data and Q-data, respectively. The AC power calculator is configured to calculate the AC power using the I-data and the Q-data.

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