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| Number | Title | Issue Date |
| 7679374 | Microwave sensing for determination of loading of filters Method for determining loading of a filter. The filter has a first dielectric constant. The filter becomes loaded with contaminant material that has a second dielectric constant. The filter, such as a diesel particulate filter, is contained within a metallic enclosu... | 03/16/2010 |
| 7656167 | Electric field generator incorporating a slow-wave structure An improved E-field generator including a slow-wave transmission line structure is provided herein. In some cases, the improved E-field generator may include an inductively-loaded slow-wave transmission line structure driven by a power source at one end of the struc... | 02/02/2010 |
| 7583091 | Printed circuit board, and backplane data transmission method In a receiving-side printed circuit board, a reflected-waveform analyzing unit analyzes a reflected wave generated in a transmission line on a backplane along with transmission of a signal from a transmitting-side printed circuit board, and acquires waveform data th... | 09/01/2009 |
| 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 emits controllably directed microwave radiation toward an object under... | 08/25/2009 |
| 7570063 | Space-time microwave imaging for cancer detection Microwave imaging via space-time beamforming is carried out by transmitting microwave signals from multiple antenna locations into an individual to be examined and receiving the backscattered microwave signals at multiple antenna locations to provide received signal... | 08/04/2009 |
| 7557588 | Method and apparatus for inspecting an object using terahertz electromagnetic wave An inspection apparatus including a transmission line for propagating an electromagnetic wave; an electromagnetic wave supply unit for supplying a terahertz wave to the transmission line; an electromagnetic wave detection unit for detecting the terahertz wave from t... | 07/07/2009 |
| 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 a shielding conductor are disclosed. Sublengths of inner conductor ar... | 05/26/2009 |
| 7535236 | Method of measuring thickness of thin film using microwave The present invention relates to a thickness measurement method for thin films using microwaves. In the method, the Q-factors of a dielectric resonator are measured. The effective surface resistance (RSeff) of a superconductor or a conductor fi... | 05/19/2009 |
| 7528613 | Apparatus and method for steering RF scans provided by an aircraft radar antenna A radar system is disclosed. The radar system comprises an antenna mounting apparatus coupled to the aircraft, and an antenna rotatably coupled to the mounting apparatus. The antenna is configured to rotationally orientate for an azimuth scan and electronically orie... | 05/05/2009 |
| 7521938 | Modeling and calibrating a three-port time-domain reflectometry system A three-port TDR front end includes numerous components. An exemplary three-port TDR front-end is a DSL modem. Information-bearing TDR signals are distorted as they pass through these components. With a perfect model of the response of its front-end, a TDR system us... | 04/21/2009 |
| 7501833 | Evanescent microwave microscopy probe and methodology The present invention generally relates to an evanescent microwave spectroscopy probe and methods for making and using the same. Some embodiments relate to a probe in electrical communication with sapphire tuning capacitors that are arranged in parallel. Some embodi... | 03/10/2009 |
| 7439749 | Non-destructive testing of physical characteristics of composite structures A method for detecting an anomaly in a composite material comprising directing two transmitted electromagnetic wave signals orthogonally polarized with respect to each other from a probe to the composite material, wherein the probe and composite material are positio... | 10/21/2008 |
| RE40488 | Orientation measuring instrument It is possible to generate a resonance mode such that a dielectric resonator (20) can be resonated and an electric field vector leaking out from the resonator (20) exists by arranging antennas (22a and 22b) for the resonator (20). ... | 09/09/2008 |
| 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 emits controllably directed microwave radiation toward an object under... | 08/26/2008 |
| 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 internal properties and characteristics (moisture content, density, ma... | 05/27/2008 |
| 7379016 | Carrier phase detection system for radar sensors A pulse detection system for expanded time radar, laser and TDR sensors detects specific cycles within bursts of cycles. A sensor transmits and receives short bursts of RF cycles. A transmit pulse detector triggers on a selected cycle of the detected transmit burst ... | 05/27/2008 |
| 7374006 | Method and device for determining the roadway condition A method and a device for determining the condition of roadway surfaces includes transmitting electromagnetic radiation at at least two different frequencies in the GHz range, reflecting and/or scattering the electromagnetic radiation by the roadway surface and subs... | 05/20/2008 |
| 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 apparatus encompasses (a) an irradiation mechanism configured to irrad... | 05/06/2008 |
| 7362260 | Method of using continuous-wave radiation for detecting and locating targets hidden behind a surface Continuous-wave radiation is used to detect a target hidden behind a surface. In an embodiment, a transmitter directs a beam of continuous-wave microwave radiation from a transmitting location, and reflected radiation from the target is received at first and second ... | 04/22/2008 |
| 7342401 | Measurement bias tee A bias tee for connecting a measurement device to a DUT, where the measurement device has a guard output, includes a DC port; a HF port; and a measurement port. The HF input port is guarded with the guard output during operation of the bias tee. ... | 03/11/2008 |
| 7342531 | Redundant level measurement in radar level gauging system A method and system for determining a product level in a tank which determine a first level measure using emission of electromagnetic waves into the tank, detect a differential pressure, determine an observed density based on the detected differential pressure and t... | 03/11/2008 |
| 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 equivalent) provides a 90° phase shift between the directional couplers. A... | 03/04/2008 |
| 7340292 | Breast cancer detection system A method for detecting breast cancer can include the step of positioning a transmitting antenna and a receiving antenna about a breast so that the transmitting antenna is positioned to transmit microwave energy into the breast and the receiving antenna is positioned... | 03/04/2008 |
| 7339382 | Apparatuses and methods for nondestructive microwave measurement of dry and wet film thickness Wet and dry film thickness can be measured non-invasively on structures, such as surfaces associated with vessels, aircraft and buildings, using calibrated microwave sensors. The film is measured by directing microwave energy toward the film. The microwave energy pa... | 03/04/2008 |
| 7333897 | Method and system for identifying material composition based upon polarization trajectories A system and method for determining a most likely material composition of an object. At least one respective stored radiation polarization transformation is stored for at least one material composition at a plurality of wavelengths. A transmitted electromagnetic sig... | 02/19/2008 |
| 7334199 | System and method for breaking a feedback loop using a voltage controlled voltage source terminated subnetwork model A system and method is disclosed for breaking a feedback loop by replacing at least one component in the feedback loop with a model containing two physically disconnected subnetworks that have terminals that are connected to ground with voltage controlled, voltage s... | 02/19/2008 |
| 7325460 | Force sensor method and construction A method of making a force sensor, the force sensor being particularly sensitive the axial component of a force applied along a predetermined axis, of the type including a force-receiving membrane deformable by an applied force to be sensed, the method comprising: p... | 02/05/2008 |
| 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 silicon wafer. The isolator is used for reducing the standing wave influenc... | 12/18/2007 |
| 7309994 | Integrated directional bridge A directional bridge for measuring propagated signals to and from a source device to a load device where both the source device and load device are in signal communication with the directional bridge is disclosed. The directional bridge may include a first bridge ci... | 12/18/2007 |
| 7307582 | Method for determining a level of material with a two-wire radar sensor comprising intermittently operating circuitry components and a two-wire radar sensor A method for determining a distance between a radar sensor and a reflection surface of a material comprising the following steps. The radar sensor is energized via a two-wire control loop which allows for data communication and an internal energy store. An echo prof... | 12/11/2007 |
| 7299698 | Vibration test module having controllable vibration attributes The present vibration test module enables a test engineer in the field of vibration test systems to precisely implement a vibration environment that is applicable to a wide range of applications and performance characteristics. The vibration test module comprises ad... | 11/27/2007 |
| 7295131 | Diagnostic system for detecting rupture or thinning of diaphragms A diaphragm diagnostic system for use in an industrial field device has a diaphragm and a diagnostic feature. The diaphragm is configured to couple the field device to a process fluid and has a plurality of layers. A first layer of the plurality of layers is exposed... | 11/13/2007 |
| 7290451 | Status discriminating apparatus of human, animal, machine or the like using ultrasonic vibration detecting sensor, and status discriminating method of human, animal, machine or the like using the same A human or other status discriminating apparatus includes an ultrasonic vibration detecting sensor comprising a container main body, a liquid packed tightly in the container main body, and an ultrasonic vibrator for transmitting ultrasonic waves into the liquid and ... | 11/06/2007 |
| 7289913 | Local feature characterization using quasistatic electromagnetic sensors Local features such as cracks in materials are nondestructively characterized by measuring a response with an electromagnetic sensor and converting this response into a selected property using a database. The database is generated prior to data acquisition by using ... | 10/30/2007 |
| 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 the waveguide to be opened for insertion of the unknown material into... | 10/30/2007 |
| 7282926 | Method and an apparatus for characterizing a high-frequency device-under-test in a large signal impedance tuning environment An impedance tuning measurement setup and method for characterizing high frequency devices-under-test whereby one inserts an extremely low loss directive coupling structure between the terminal of the device-under-test and that part of the impedance tuner that gener... | 10/16/2007 |
| 7280227 | Device, method and system for measuring the distribution of selected properties in a material A device for measuring a distribution of selected properties of a material. The device includes an emitter configured to emit electromagnetic radiation at at least a first and second frequency in a selected frequency range through the material, at least one sensor c... | 10/09/2007 |
| 7265558 | Radar level gauge using elliptically or circularly polarized waves A radar level gauge (RLG) is provided for determining a filling level of a filling material contained in a container by transmitting and receiving elliptically or circularly polarized waves. The RLG comprises: a feeding circuitry for feeding and receiving two essent... | 09/04/2007 |
| 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 transmitting and receiving conductive elements that are electrically di... | 08/28/2007 |
| 7259570 | Magnetic signal measurement apparatus As the length of a cylinder of a magnetically shielding apparatus is shorter, the amount of magnetism of a component perpendicular to an axis of the cylinder which enters the opening portion of the cylinder is larger, resulting in a lower magnetic shield effect. A s... | 08/21/2007 |