公开(公告)号：US5214372A

公开(公告)日：1993-05-25

申请号：US777453

申请日：1991-10-11

Applicant: Risto Vaisanen ,  Jukka Sarasmo ,  Vesa Pekkarinen

Inventor： Risto Vaisanen ,  Jukka Sarasmo ,  Vesa Pekkarinen

IPC: G01R21/01

CPC classification number: G01R21/01

Abstract: The present invention concerns a circuit processes the power signal emitted from an RF power sensor (SK) of a radio telephone to create a detector voltage which is proportional to the power level of the radio telephone transmitter. The circuit comprises a transistor (Q2) acting as an active rectifier, which in the ascending part of the positive half cycle of the power signal charges a capacitor (C3). During the descending part of the power signal the capacitor starts to discharge with a time constant which is remarkably greater than the cycle length of the power signal. The transistor is biassed by means of a transistor (Q1) so that it is conductive even at the lowest power levels.

Abstract translation: 本发明涉及电路处理从无线电话的RF功率传感器（SK）发射的功率信号，以产生与无线电话发射机的功率电平成正比的检测器电压。 电路包括用作有源整流器的晶体管（Q2），其在功率信号的正半周期的上升部分对电容器（C3）充电。 在功率信号的下降部分期间，电容器开始放电，时间常数明显大于功率信号的周期长度。 晶体管通过晶体管（Q1）偏置，使得即使在最低功率电平下它也是导电的。

公开(公告)号：US4354153A

公开(公告)日：1982-10-12

申请号：US95690

申请日：1979-11-19

Applicant: Ronald R. Lentz

Inventor： Ronald R. Lentz

IPC: G01R21/01 ,  H05B6/76 ,  G01R21/04 ,  H05B9/06

CPC classification number: H05B6/6432 ,  G01R21/01 ,  H05B6/763

Abstract: A stationary microwave leakage detector and method for testing microwave ovens for the maximum power density of microwaves leaking through the oven's door seals. The leakage detector is composed of an array of antennae arranged in a line generally circumscribing the circumference of the door at a fixed distance therefrom. The antennae are spaced apart a predetermined maximum distance thus insuring that a given antennae will sense at least a portion of the narrowest possible beam of microwaves emitting from the periphery of the door. Furthermore, the spacing and arrangement of the array vis-a-vis the oven door insure that the minimum power density observed by an antenna is a known ratio of the maximum power density of a narrowest beam possibly incident thereon, thus providing a means to guarantee from the measured power density levels that there are no microwaves leaking from the oven under test greater than a certain maximum power density. Alternately, the antennae are spaced such that the sum of any two adjacent antennae will be equal to or greater than the maximum power density of a narrowest beam possibly incident upon one of them. This antenna spacing provides a stationary method for testing microwave ovens for the maximum power density of microwaves leaking through the oven's door seals.

Abstract translation: 一种固定的微波泄漏检测器和微波炉的测试方法，用于通过烤箱的门密封件泄漏的微波的最大功率密度。 泄漏检测器由天线阵列组成，天线阵列以大致围绕门的圆周的距离定界。 天线间隔开预定的最大距离，从而确保给定的天线将感测从门的周边发射的最窄可能的微波束的至少一部分。 此外，阵列相对于烤箱门的间隔和布置确保天线观察到的最小功率密度是可能入射到其上的最窄波束的最大功率密度的已知​​比例，从而提供了保证的手段 从测量的功率密度水平，没有从被测试的炉子泄漏的微波大于一定的最大功率密度。 或者，天线间隔开，使得任何两个相邻天线的总和将等于或大于可能入射到其中一个的最窄波束的最大功率密度。 这种天线间距提供了一种稳定的方法，用于测试微波炉的最大功率密度，通过烤箱门密封件泄漏的微波。

公开(公告)号：US4011529A

公开(公告)日：1977-03-08

申请号：US616886

申请日：1975-09-25

Applicant: Arthur Garcia

Inventor： Arthur Garcia

IPC: G01R21/01 ,  G01R27/00 ,  G01R27/04 ,  H01P5/18

CPC classification number: H01P5/183 ,  G01R21/01 ,  G01R27/00 ,  G01R27/04

Abstract: A device for detecting the power of incident or reflected waves along a transmission line is described which includes a capacitive pick-up element in series with a summing capacitor between the two conductors of the transmission line. The capacitive pick-up element provides a current sample through the summing capacitor in proportion to the line voltage. A coupling loop positioned in the approximate region of the capacitive pick-up element and in series resonance with the summing capacitor provides a current sample through the summing capacitor in proportion to the line current. The coupling loop is of highly resistive material to maintain the magnitude and phase of the developed line current sample relatively independent of frequency over a relatively broad range of frequencies.

Abstract translation: 描述了一种用于检测沿着传输线的入射或反射波的功率的装置，其包括与传输线的两个导体之间的加法电容器串联的电容拾取元件。 电容式拾取元件通过加法电容器提供与线电压成比例的电流采样。 位于电容拾取元件的大致区域并与求和电容器串联谐振的耦合回路通过与线电流成比例的乘法电容器提供电流样本。 耦合回路是高电阻材料，以在相对较宽的频率范围内保持显影线电流样本的幅度和相位相对独立于频率。

公开(公告)号：US3387100A

公开(公告)日：1968-06-04

申请号：US38755064

申请日：1964-07-30

Applicant: NAVY USA

Inventor： GERALD CHIPMAN ,  PIERCE RICHARD L ,  WALTER GRENGG

IPC: G01R21/01 ,  G11B5/012 ,  G11B11/11 ,  G11B11/115

CPC classification number: G11B11/115 ,  G01R21/01 ,  G11B5/012 ,  G11B11/11

公开(公告)号：US11815530B2

公开(公告)日：2023-11-14

申请号：US16976666

申请日：2018-03-27

Applicant: Apple Inc.

Inventor： Joerg Fuhrmann ,  Werner Schelmbauer ,  Herbert Stockinger ,  Dieter Pimingsdorfer

IPC: G01R15/09 ,  H04B17/10 ,  G01R21/01 ,  H03F3/19 ,  H03K5/24

CPC classification number: G01R15/09 ,  G01R21/01 ,  H03F3/19 ,  H03K5/24 ,  H04B17/101 ,  H03F2200/294 ,  H03F2200/451

Abstract: A radio frequency (RF) power detector with a variable threshold for dynamic power detection. The RF power detector includes stacked transistors of an input stage and stacked transistors of an output stage. A DC bias voltage plus an input RF signal are applied to a control electrode on the input stage and the same DC bias voltage plus an additional DC bias voltage are applied to a control electrode on the output stage. Depending on the input power of the RF signal, a Δ current is generated in the output stage, and the output capacitor is either charged or discharged, and the output capacitor voltage is compared to a threshold to generate an output signal. The output signal may be averaged over time by two capacitors, miller capacitor and output capacitor. The output voltage of the RF power detector is an integration over time of the input RF power.

公开(公告)号：US09939467B1

公开(公告)日：2018-04-10

申请号：US15293615

申请日：2016-10-14

Applicant: Analog Devices, Inc.

Inventor： Alexandru Aurelian Ciubotaru

IPC: G01R19/04 ,  G01R21/01 ,  G01R29/08

CPC classification number: G01R19/04 ,  G01R21/01 ,  G01R29/08

Abstract: An RF peak-detector circuit can operate over a wide range and can compensate or correct an output voltage error term that depends on the thermal voltage and the input signal voltage. At or near a minimum value of the input signal voltage range, such compensation can include a scaled base-emitter ratioing of bipolar junction transistors used to generate the output voltage, each of which can be biased by a primary current. At or near a maximum value of the input signal voltage range, this can include using an auxiliary bias current circuit that can shift auxiliary bias current between these bipolar junction transistors. The auxiliary bias current circuit can include scaled bipolar junction transistors in a cross-coupled configuration and an equivalent resistance circuit between emitters of the cross-coupled BJTs. This can provide a robust approach for improving the accuracy of an RF peak-detector circuit over a wide range.

公开(公告)号：US20180041288A1

公开(公告)日：2018-02-08

申请号：US15555886

申请日：2016-02-26

Applicant: ZTE (USA) Inc.

Inventor： CAROLYN TAYLOR

IPC: H04B17/10

CPC classification number: H04B17/102 ,  G01R21/01 ,  G01R29/10 ,  H04B17/0085

Abstract: On a tablet user equipment that is proximate to a hand phantom, a method determines the total radiated power of the user equipment includes, in response to a preset criterion, obtains a characteristic of the phantom, obtains a characteristic of an antenna of the user equipment, and obtains a radio characteristic of the user equipment. The method may also include transmitting the phantom characteristic, the antenna characteristic, and the radio characteristic to a test equipment.

公开(公告)号：US09793717B2

公开(公告)日：2017-10-17

申请号：US14335655

申请日：2014-07-18

Applicant: QUALCOMM Incorporated

Inventor： Mark D. White, II ,  Edward Kenneth Kallal ,  Ryan Tseng ,  Joseph N. Maalouf

IPC: H02J5/00 ,  G01R29/08 ,  H02J7/02 ,  G01R21/01 ,  G01V3/12 ,  H04B5/00 ,  H02J7/00

CPC classification number: H02J50/12 ,  G01R21/01 ,  G01R29/0814 ,  G01V3/12 ,  H02J5/005 ,  H02J7/0052 ,  H02J7/007 ,  H02J7/025 ,  H02J50/40 ,  H02J50/80 ,  H04B5/0037 ,  H04B5/0075

Abstract: An apparatus and method for lost power detection are described. In one implementation, an apparatus for wireless transferring power comprises a wireless power transmitter configured to wirelessly transmit power at a power level sufficient to power or charge a chargeable device. The apparatus further comprises a controller configured to determine a first and second power difference between a first and second power measurement and the second and a third power measurement of the power level provided by the wireless power transmitter at a first, second, and third sample time, respectively. The controller is further configured to determine a transmitter power difference between the first power difference and the second power difference. The controller is further configured to determine an absence or a presence of an object that affects consumption of power transmitted by the wireless power transmitter based at least on the transmitter power difference Δ_T.

公开(公告)号：US20160282440A1

公开(公告)日：2016-09-29

申请号：US15172572

申请日：2016-06-03

Applicant: DAIHEN Corporation

Inventor： Ryohei TANAKA

IPC: G01R35/04 ,  G01R21/06

CPC classification number: G01R35/04 ,  G01R21/01 ,  G01R21/06 ,  G01R35/00 ,  G01R35/005

Abstract: A method is provided for evaluating the reliability of an electrical power measuring device for measuring high-frequency electrical power. To build an evaluation system, the measuring device, together with a reference electrical power measuring device, is arranged between a high-frequency power supply device and an artificial reproduction load, which includes an impedance conversion device and a reference load. Using this system, an uncertainty range of an electrical power measured value measured by the measuring device is calculated, according to a prescribed calculation formula, from the electrical power measured value, and a judgment is made as to whether or not the electrical power measured value measured by the measuring device is within the uncertainty range. If it is within the uncertainty range, the measuring device is evaluated as being reliable, while if it is not within the uncertainty range, the measuring device is evaluated as being unreliable.

Abstract translation: 提供了用于评估用于测量高频电力的电力测量装置的可靠性的方法。 为了建立评估系统，测量装置与参考电力测量装置一起布置在高频电源装置和包括阻抗转换装置和参考负载的人造再现负载之间。 使用该系统，根据规定的计算公式，根据电功率测量值计算由测量装置测量的电力测量值的不确定性范围，并且判断电功率测量值 由测量装置测量在不确定范围内。 如果在不确定范围内，则测量装置被评估为可靠，而如果不在不确定范围内，则测量装置被评估为不可靠。

公开(公告)号：US09297840B2

公开(公告)日：2016-03-29

申请号：US13612516

申请日：2012-09-12

Applicant: Kazuhiro Ueda

Inventor： Kazuhiro Ueda

IPC: G01R35/00 ,  G01R21/00 ,  H03D1/10 ,  G01R21/01 ,  G01R21/12

CPC classification number: G01R21/00 ,  G01R21/01 ,  G01R21/12 ,  H03D1/10

Abstract: There is provided a power detection circuit capable of appropriately adjusting detection voltage characteristics by using simple configuration. The power detection circuit includes a first resistor having current applied thereto to adjust a detection voltage value of input power, an element having an applied voltage and a load characteristic changed according to the input power, and a second resistor connected to the element and having current applied thereto when resistance of the element becomes relatively low, to adjust the detection voltage value of the input power. Detection voltage characteristics may be appropriately adjusted using a simple configuration.

Abstract translation: 提供了能够通过简单的配置适当地调整检测电压特性的功率检测电路。 功率检测电路包括：第一电阻器，其施加有电流以调节输入功率的检测电压值;具有施加电压和根据输入功率改变的负载特性的元件;以及连接到元件并具有电流的第二电阻器 当元件的电阻相对较低时施加到其上，以调整输入功率的检测电压值。 可以使用简单的配置适当地调整检测电压特性。