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7579845 |
Methods and systems for the rapid detection of concealed objects
The present invention provides for an improved scanning process having microwave arrays comprised of microwave transmitters in radiographic alignment with microwave receivers. The microwave array...
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7548072 |
Potential separation for filling level radar
Both in potential separation in the microwave path, and in potential separation directly between the two-wire loop and the output circuit, the quality of signal transmission may be negatively...
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7538561 |
Method for detecting an interface between first and second strata of materials
Methods of detecting an interface between materials having different dielectric loss factors using an apparatus having a transmission line including an inner conductor surrounded by dielectric and...
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7518353 |
Vector network analysis system and method using offset stimulus signals
A vector network analysis system and a method of measuring use offset stimulus signals to stimulate a balanced device under test (DUT) to determine performance parameters. The system includes an...
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7514269 |
Precision adaptable chemical spectrometer
The invention is directed to a spectrometer for measuring submillimeter absorption. The spectrometer may include a solid state exciter generating a submillimeter wave and sweeping a predetermined...
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7482818 |
Systems and methods for detecting the presence and/or absence of a solid liquid or gas
Systems and methods are described for detecting the presence and/or absence of a solid, liquid or gas which utilize an RF energy emitter and RF energy detector for determining whether a solid,...
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7454242 |
Tissue sensing adaptive radar imaging for breast tumor detection
A tissue-sensing adaptive radar method of detecting tumours in breast tissue uses microwave backscattering to detect tumours which have different electrical properties than healthy breast tissue....
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7442935 |
Device for analyzing the composition of the contents of a container
The present invention relates to a device for analyzing the composition of the contents of a receiver comprising: means ( 40 ) for emitting/receiving an electromagnetic field at a variable...
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7439748 |
Method and apparatus for measuring high-frequency electrical characteristics of electronic device, and method for calibrating apparatus for measuring high-frequency electrical characteristics
A signal conductor whose first end is an open end, and a ground conductor are connected to associated measurement ports of a network analyzer. A short standard is connected between the signal...
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7417440 |
Methods and systems for the rapid detection of concealed objects
The present invention provides for an improved scanning process having microwave arrays comprised of microwave transmitters in radiographic alignment with microwave receivers. The microwave array...
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7378855 |
Bi-directional three-Dimensional microwave scanning and volumetric mapping of a whole roll or pallet of paper
Bi-directional (longitudinal and angular) three-dimensional volumetric microwave scanning of a whole roll or pallet of paper (FIGS. 3, 4 ), including three-dimensional volumetric mapping of...
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7367226 |
Interface detection apparatus and method for detecting hidden interface using microwave
An interface detection apparatus detects a position of a hidden interface between first and second materials, the first material having a different physical property from the second material. The...
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7309995 |
Noncontact conductivity measuring instrument
The present invention relates to measurement of conductivity. A microwave oscillated by an oscillator using a Gunn diode is applied through an isolator, a circulator, and a horn antenna to a...
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7307431 |
System and method for microwave non-destructive inspection
A system and method for inspecting a composite structure, such as to assess thermal degradation or resin curing, are provided in which the dielectric constant of the composite structure is...
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7298152 |
Damage detection system
A damage detection system includes a processor and a transmitter communicatively connected to the processor. The transmitter sends a signal to the processor and the processor is programmed to...
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7288944 |
Evanescent waveguide apparatus and method for measurement of dielectric constant
A dielectric constant waveguide measuring apparatus preferably comprises a rectangular waveguide aperture on each end with a width a and height b. The waveguide frame is preferably split to permit...
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7262607 |
Characterizing substances with multistatic probes
The disclosed technology can be used in the development and operation of multistatic probes that can characterize substances and relationships between substances. A multistatic probe can include...
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7259571 |
Detector of objects by microwave frequency echo analysis
The field of the invention is that of devices for detecting non-metallic objects concealed on human subjects. These devices are more particularly dedicated to the surveillance and protection of...
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7253641 |
Radio frequency particulate sensing system
A particulate sensing system for a particulate trap including a radio frequency transmit circuit and a radio frequency receive circuit is disclosed. The transmit circuit may include a wideband...
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7242176 |
Systems and methods for evaluating electromagnetic interference
Systems and methods for evaluating electromagnetic interference that may be employed, for among other things, to evaluate electronic system immunity to radiated electromagnetic fields and/or to...
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7235982 |
Re-calculating S-parameter error terms after modification of a calibrated port
A two-port S-parameter calibration between a first port and a second port of a test system having a multi-port vector network analyzer is performed to provide a first S-parameter calibration of the...
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7221169 |
Ultra-wide band pulse dispersion spectrometry method and apparatus providing multi-component composition analysis
Embodiments cause interaction of an ultra-wide band signal with a substance over a broad range of frequencies simultaneously to obtain a response signal whose distortion is indicative of a...
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7190176 |
Analysis of variable-depth sample using a sweeping microwave signal
An apparatus and method for analysing an amount of at least one component in a sample ( 21 ) by measuring a microwave signal ( 13 ) that has passed at least partially through the sample ( 21 ), the...
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7157919 |
Method and system for detecting soot and ash concentrations in a filter
A system and method for detecting soot and or ash loading within a filter is provided. The method comprises the steps of transmitting a source RF signal through a filter, measuring a reflected RF...
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7145349 |
Method for increasing the interference resistance of a time frame reflectometer and a circuit device of implementing said method
The invention relates to methods and a circuit for increasing the interference resistance of a time frame reflectometer, in particular with respect to high frequency irradiation. A transmitted...
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7135870 |
Device for determining the composition of a fluid mixture
A method and apparatus are disclosed for determining the concentration of individual components within a fluid mixture by determining the permittivity of the individual components. The method and...
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7102363 |
Method and system for non-contact measurement of microwave capacitance of miniature structures of integrated circuits
A method and system for non-contact measurements of microwave capacitance of miniature structures patterned on wafers used for production of modern integrated circuits. A near-field balanced...
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7088111 |
Enhanced isolation level between sampling channels in a vector network analyzer
A system and method for providing improved isolation between sampling channels in a vector network analyzer and sampling circuit. A vector network analyzer sampling channel includes a non-linear...
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7080554 |
High-precision measuring method and apparatus
A method and apparatus for monitoring a condition having a known relation to, or influence on, the transit time of a cyclically-repeating energy wave moving through a transmission channel, by: (a)...
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7075314 |
Method and apparatus for measuring complex dielectric constant of dielectric
An electromagnetic wave is input to a resonator 14 filled with a dielectric and a gas, and a resonance frequency, an insertion loss and a half-power width in the resonance mode of the...
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7068051 |
Permittivity monitor uses ultra wide band transmission
Narrow pulses transmitted wirelessly from a transmitting antenna to a receiving antenna are used to measure the electrical permittivity of the medium of interest between the two antennas. Timing...
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7061184 |
Plasma electron density measuring and monitoring device
The present invention discloses a device for measuring and monitoring electron density of plasma. The device includes a chamber filled with plasma having varying electron density; a frequency probe...
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7057398 |
Microwave spectrometer
An improved microwave spectrometer for measuring the concentration of ethylene oxide gas and the concentration of water vapor in one or more gas samples taken from an ethylene oxide sterilization...
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7053630 |
Level gauging system
A radar level gauge for measuring the level of a surface of a product stored in a tank by use of radar. The radar transmits microwaves towards the surface and receives microwaves reflected by the...
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7042231 |
Method for monitoring the properties of pharmaceutical articles
In a method for monitoring the properties of pharmaceutical articles ( 2 ), in particular capsules ( 2 ), in a machine ( 1 ) that makes the articles ( 2 ), the pharmaceutical articles ( 2 ) are fed...
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7019537 |
Non-destructive determination of machining induced surface defects on metal parts
A non-destructive method of detecting and measuring machining induced surface defects on gas turbine engine components is provided. In an exemplary embodiment, the method includes positioning an...
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7017413 |
Methods for quantitatively determining lengthwise shrinkage in wood products
Embodiments of the present invention quantify lengthwise shrinkage to a higher degree of accuracy over currently known methods by employing reactive force values, such as stiffness measurements, in...
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6995572 |
Sensor and method for detecting a superstrate
Method and apparatus are provided for determining a superstrate on or near a sensor, e.g., for detecting the presence of an ice superstrate on an airplane wing or a road. In one preferred...
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6995569 |
Device for electromagnetic characterisation of a tested structure
A device for electromagnetic characterization of a tested structure elevates, on a predetermined frequency band, distribution parameters of the structure and parameters characteristic of the...
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6984993 |
Method and apparatus for making high-precision measurements
A method and apparatus for measuring a predetermined parameter, by providing a displaceable sensor on a mounting member such that the displaceable sensor changes in location, form or length with...
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6885198 |
Method and device for testing a mat made of biomass particles
A testing device tests a mat that is moved in one direction and that is made of biomass particles for manufacturing boards. On one side of the mat, radiation sources are positioned with a...
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6882161 |
Method of measuring dielectric constant of PCB for RIMM
Disclosed herein is a method of measuring a dielectric constant of a Printed Circuit Board (PCB) for a Rambus Inline Memory Module (RIMM), which includes the steps of measuring a length of a Rambus...
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6879166 |
Microwave measurement of phase equilibria
A microwave resonator apparatus (35) includes a microwave resonant cavity (36) in fluid communication chamber (38) are dimensioned to ensure high attenuation of resonant electromagnetic fields...
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6859047 |
Anechoic test chamber and method of determining a loss characteristic of a material specimen
An anechoic test chamber for testing an electromagnetic loss characteristic of a material specimen has first and second opposed and tapered conical sections. The chamber has an anechoic material...
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6844552 |
Terahertz transceivers and methods for emission and detection of terahertz pulses using such transceivers
A system for emitting and detecting terahertz frequency electromagnetic pulses. The system comprises a single transceiver device, which may be an electro-optic crystal or photoconductive antenna,...
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6836189 |
RF choke bias scheme for load pulled oscillators
A load-pulled oscillator circuit in which RF blocking on the power supply connections is achieved by an active stage rather than an inductor. This avoids the problems of temperature dependence,...
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6835934 |
Method of determining a characteristic of a security document, such as a banknote
A method of determining at least one characteristic of one or more security documents such as banknotes, each security document including a sheet-like substrate of plastics material and opacifying...
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6801131 |
Device and method for detecting insects in structures
A device and method for detecting the presence of insects in a structure utilize a plurality of transceivers, each of which generates separate and distinct microwave signals and receives separate...
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6788244 |
Inspection device for radar absorbing materials
The invention is a device for inspecting an assembly including a surface coating containing magnetic radar-absorbing materials on a conductive surface. In detail, the device includes a first system...
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6788072 |
Apparatus and method for sensing particle accumulation in a medium
A method and apparatus for detecting an accumulation of particles with a medium such as the soot content in diesel engine oil including generating a first waveform at a first frequency and a first...
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