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7583074 |
Low cost millimeter wave imager
Low cost millimeter wave imagers using two-dimensional focal plane arrays based on backward tunneling diode (BTD) detectors. Two-dimensional focal arrays of BTD detectors are used as focal plane...
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7548074 |
Micromechanical microwave power meter
A micromechanical sensor for measuring millimetric wave or microwave power, which sensor includes a wave line for conducting the millimetric or microwave power and a moving part and a fixed...
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7414424 |
Directional power detection by quadrature sampling
Power measurement and control in transmission systems are affected by changes in load conditions. A method and system are provided for detecting and controlling power levels independent of such...
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7372249 |
Load measurement for a thermal microwave power sensor
A thermocouple power sensor includes the ability to monitor the value of a RF load resistor. A meter connects to the input of a thermocouple-based RF signal power detector. The apparatus can sense...
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7356309 |
Directional coupler for communication system
An improved directional coupler that significantly reduces the signal degradation problems associated with distortion caused by circuit elements used to measure the transmitted power. In a selected...
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7339366 |
Directional coupler for a accurate power detection
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...
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7274206 |
Output power detection circuit
A detection circuit for detecting the output power of a power amplifier comprises a first current minor transistor (Ti 1 ) having a base, which is connectable to a power transistor (T 10 ), and a...
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7268564 |
Apparatus for measuring specific absorption rate of radio communication apparatus
In an apparatus for measuring a specific absorption rate (SAR), a first near magnetic field distribution of a radio wave radiated from an array antenna of a reference antenna including a plurality...
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7256573 |
Distributed active transformer power control techiques
A distributed active transformer on a semiconducting substrate is provided. The distributed active transformer includes an outer primary, a secondary disposed adjacent to the outer primary, and an...
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7221141 |
Switched measuring system and method for measuring radiant signals
A system for measuring radiant signals includes a detector circuit for detecting a time multiplexed, measured radiant signal and reference signal. A switch is connected to the detector circuit for...
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7190935 |
Amplifier power detection circuitry
The present invention provides an efficient way to detect the transmit power provided by an amplifier. A power sense signal indicative of the transmit power of the amplifier is generated and fed...
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7188037 |
Method and apparatus for testing circuit boards
The invention provides a method of apparatus for testing circuit boards which does not require any inner wide power plane so as to detect an open circuit defect and/or a short circuit defect in a...
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7173433 |
Circuit property measurement method
In a high frequency circuit property measurement method, prior to property measurements of a high frequency circuit with RF measurement probe heads, RF measurement probe heads are calibrated using...
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7102345 |
Portable VI probe
A portable voltage and current (VI) probe including voltage and current probes, a clamshell assembly, and insulation sections for attachment to at least one transmission line. A stripper tool...
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7098646 |
Radio frequency power generation and power measurement
A radio frequency power generation and power measurement system includes power sensors to measure both the radio frequency (RF) power transmitted by radio equipment under test, and the RF power...
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7088089 |
Power detector with constant voltage decoupling
A power detector for measuring the average power, without constant voltage, of modulated or unmodulated high frequency or microwave signals is described. The power detector includes a signal line...
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7049805 |
Radio frequency power measurement
An unknown RF power is converted to a voltage by a detector ( 11 ). The voltage is converted to a number by a digitiser ( 12 ). A separate and fixed RF power reference ( 14 ) drives a second...
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7020443 |
System for measuring a radio frequency signal in a wireless station and a wiring board switch
The invention relates to a method for measuring a radio frequency signal in a wireless station ( 1 ). In this method, radio frequency power is measured by means of testing equipment ( 6, 7, 12 ),...
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6998836 |
Low loss integration of wafer probes with microwave tuners
This invention relates to the reduction of insertion losses and by consequence maximization of reflection factors for on-wafer load pull testing of high power or low noise transistor chips, using...
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6980167 |
Electromagnetic probe
An electromagnetic probe having at least one assembly including in combination: a coaxial type connectio, a ground plane connected to the outer sheath of the coaxial connection, a reflector cone...
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6980163 |
Signal leakage detector
An antenna apparatus for detecting a leaked electromagnetic signal is provided. The apparatus includes a telescoping antenna and a casing, which has a portion of the antenna mounted in it. The...
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6972686 |
Radiated field detector
A testing device is operative to sense or monitor a radiated field emitted by an igniter for heating equipment such as an oil burner and to indicate the detection corresponding to a normal...
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6969985 |
Active coupler
A coupler circuit for sampling an output power of a signal from an output power source has at least one first sampling element for sampling a first portion of the signal and at least one second...
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6968278 |
Reducing the occurrence of spurs when analyzing signals
The occurrence of spurs when analyzing signals is reduced. A first signal is mixed with a local oscillator signal to produce an intermediate signal. When a spur is predicted to occur when high side...
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6965237 |
Device for scanning or detecting electromagnetic waves
A detecting device for detecting electromagnetic waves generated by electric facilities includes a support having a peripheral surface for attaching a number of wave detectors which detect the...
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6940264 |
Near field probe
A near field probe for testing installed components of an electromagnetic radiating system on a missile. The probe design comprises a diode antenna with a balun. The probe utilizes a dual diode...
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6903542 |
Systems and method for performing RF power measurements
In one embodiment, a radio frequency (RF) power meter operates according to a variable loop bandwidth according to the nature of the RF signal to be measured. The RF power meter comprises: a first...
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6903541 |
Film-based microwave and millimeter-wave circuits and sensors
Flexible multilayer microwave or mm-wave circuits and sensors are provided having at least (a) a first metallization layer, at least a portion of the first metallization layer being adapted for...
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6894476 |
Efficient coupler detector circuit with reduced harmonic distortion
An exemplary coupler detector circuit comprises a coupler, a detector circuit, and a harmonic tank. The coupler has a transmission line electromagnetically coupled to a coupled line, and the...
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6841986 |
Inductively coupled direct contact test probe
A probe for measuring radio frequency/electromagnetic interference (RF/EMI) is used in combination with a spectrum analyzer or oscilloscope (measuring equipment) to measure and/or test for EMI in...
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6836105 |
Apparatus for power measuring receiver
Power measuring receiver (PMR) methods and apparatus for measuring power of signals are provided in which a high frequency measuring circuit (HFMC), a conversion measuring circuit (CMC), and an...
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6812686 |
Method of forming an RF detector and structure therefor
An RF detector ( 15 ) is formed to compress the output voltage at two different rates depending on the value of the output voltage. Using two different rates of compression reduces saturation of...
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6806699 |
Method and apparatus for monitoring live electrical equipment at high or medium voltage
An apparatus for monitoring live electrical equipment at high or medium voltage includes a sensor unit placed on the equipment having a first radio antenna, a sensor for producing a digital signal...
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6804617 |
Field distribution measuring method and device
A field distribution measuring method for measuring a spatial distribution of an electric field or a magnetic field at a plurality of sampling points. The method includes the steps of continuously...
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6803754 |
Power sensor
A power sensor for measuring the average power of modulated or non-modulated high-frequency or microwave signals across a wide dynamic range is disclosed, in which a combination of the following...
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6767129 |
Microwave power sensor and method for manufacturing the same
A microwave power sensor and a method for manufacturing the same. The microwave power sensor includes a semiconductor substrate with a nitride or oxide film formed thereon. A membrane which is a...
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6759854 |
Test apparatus for testing devices under test and method for transmitting a test signal
A test apparatus comprises an input for receiving a test signal from a test signal source, wherein a signal line with a predefined characteristic wave impedance can be connected to the input. The...
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6759839 |
Wide-band RF signal power detecting element and power detecting device using the same
A wide-band RF signal power detecting element includes, on an insulating substrate ( 21 ), at least one thin-film resistor ( 22 a ) for absorbing the power of a signal to be measured and generating...
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6753676 |
RF test probe
An inexpensive RF test probe provides consistent monitoring of an RF signal while having minimal effect on the circuit under test. In one embodiment, an RF test probe comprises a return conductor...
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6724196 |
Temperature controlled high voltage regulator
A temperature controlled high voltage regulator for automatically adjusting the high voltage applied to a radiation detector is described. The regulator is a solid state device that is independent...
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6717398 |
Signal launch connecting techniques
A technique provides a radio frequency probe. The technique involves obtaining a surface mount connector having a flat-faced side that includes (i) a central region, (ii) a conductive outer region...
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6708123 |
Voltage current sensor with high matching directivity
A technique for measuring the current, voltage and phase of a radio frequency (RF) power wave to an RF load, accounts for the finite length of the voltage and current pickups, and corrects for...
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6683471 |
Power detector using FET transistor
The present invention relates to a circuitry for detecting the power of a RF signal ( 7 ) comprising a FET transistor ( 1 ) connected in parallel to two inputs ( 2, 2 ′) for supplying the RF...
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6670801 |
Second harmonic tuning of an active RF device
Second-order harmonic tuning of an active device, such as a transistor used in a radio frequency (RF) power amplifier circuit, is accomplished by positioning a quarter-wavelength stub along a...
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6657425 |
Power measurement circuit including harmonic filter
A shorting element, preferably a resonant inductor-capacitor circuit, is inserted in parallel with a sense transistor, which itself is in parallel with a power transistor. The use of the shorting...
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6639154 |
Apparatus for forming a connection between a circuit board and a connector, having a signal launch
A circuit board includes (i) a section of circuit board material having a signal conductor, a ground conductor, and dielectric material that separates the signal conductor and the ground conductor,...
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6611150 |
Leakage detector for use in combination with a signal level meter
A leakage detector includes a receiver front end having an input for connection with an antenna and a signal path including circuitry for passing a signal from the input without amplification; an...
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6600307 |
Method and apparatus for measuring true transmitted power using a broadband dual directional coupler
A dual-directional coupler for measuring true RF power apparent at a radiating element. Incident and reflected power are detected by a pair of detectors. The difference between the two detected...
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6553830 |
Fluid measuring device measuring fluid level in a container at high temperatures and/or high pressures and/or in a chemically aggressive environment using microwaves
The invention concerns a microwave level measuring device for measuring of material levels in containers, suitable for operation at extreme container conditions, comprising high temperatures, high...
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6548999 |
RMS power sensor with 84 dB dynamic range
A power meter includes components to measure RMS power over an 84 dB range or greater using the I-V square-law relation of a diode for measurements. The power meter includes multiple diodes along...
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