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| Number | Title | Issue Date |
| 8130002 | Device and method for detecting direction of polarization of ferroelectric material A device for detecting polarization direction of a ferroelectric is provided. From a measurement signal provided through a probe disposed in contact with or near the surface of a ferroelectric, a demodulation means generates a detection signal having a signal level ... | 03/06/2012 |
| 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 |
| 7352264 | Electronically tunable dielectric resonator circuits In order to permit electronic tuning of the frequency of a circuit including dielectric resonators, such as a dielectric resonator filter, tuning plates are employed adjacent the individual dielectric resonators. The tuning plates comprises two separate conductive p... | 04/01/2008 |
| 7310031 | Dielectric resonators and circuits made therefrom A dielectric resonator having variable cross-section, preferably varying monotonically, and, most preferably, the resonator being in the shape of a truncated cone. Such shapes displace the H11 mode from the TE mode in the longitudinal direction of the con... | 12/18/2007 |
| 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 |
| 7267651 | Method and apparatus for blood flow measurement using millimeter wave band A system and method that determines a blood flow rate in an area of a subject. The system includes a transmitter operable to transmit an electrical signal in the range of about 20 GHz to about 300 GHz to the area, a temperature sensor positioned adjacent the area, a... | 09/11/2007 |
| 7268563 | Measurement of point contact Andreev-reflection characteristics of half-metallic thin films An apparatus for measuring spin polarization via Point Contact Andreev Reflection (PCAR) at a magnet-superconductor junction, with variable magnetic fields and temperature control. A cryostat probe investigates superconducting energy gap and Andreev reflection in su... | 09/11/2007 |
| 7190177 | Method and apparatus for nondestructive sample inspection An apparatus for inspecting a sample for defects includes a signal generator for generating a signal and a device for splitting the signal into two separate signals which have substantially equal phase and magnitude. A sensor radiates the two signals on the sample a... | 03/13/2007 |
| 7187183 | Apparatus and method for microwave determination of at least one physical parameter of a substance A method and an apparatus is described to measure at least one physical parameter of a substance such as moisture and salt content. This is done by transmitting a microwave beam through the material to be measured and detect only a reflection of a predetermined pola... | 03/06/2007 |
| 7183881 | Cross-coupled dielectric resonator circuit A cross-coupled dielectric resonator circuit. Resonator circuits in accordance with the invention may be used to build low-loss compact filters, oscillators, and other circuits, particularly microwave circuits. The resonators are arranged relatively to each other wi... | 02/27/2007 |
| 7176696 | Method of detecting and eliminating foreign bodies in a flow of tobacco In a method of detecting and eliminating foreign bodies in tobacco, a flow of tobacco advances first through a preparation zone where it is gathered into a continuous ribbon of tobacco filler, then through a forming station at which the filler is used to fashion a c... | 02/13/2007 |
| 7149633 | Displacement method of knot sizing A method of estimating the displaced size of a knot in a lumber piece includes the steps of: translating the lumber piece downstream along a flow path between a radiation source and sensor while simultaneously irradiating the lumber piece with radiation from the fir... | 12/12/2006 |
| 7109724 | Method and apparatus for nondestructive measurement and mapping of sheet materials An apparatus for contactless measurement of sheet charge density and mobility includes a microwave source, waveguide, first, second and third detectors, and an eccentric bore mount for adjusting the sample. A circular waveguide, carrying the TE11 mode, te... | 09/19/2006 |
| 7057480 | Cross-coupled dielectric resonator circuit A cross-coupled dielectric resonator circuit. Resonator circuits in accordance with the invention may be used to build low-loss compact filters, oscillators, and other circuits, particularly microwave circuits. The resonators are arranged relatively to each other wi... | 06/06/2006 |
| 6999672 | Waveguide to microstrip transition A waveguide coupling device comprises a waveguide section in which a guided wave may be propagated in at least one waveguide mode and which has two slits in one of its walls. The waveguide mode has a field component parallel to the slotted wall with a nodal plane or... | 02/14/2006 |
| 6987481 | Radar filling level measurement using circularly polarized waves The present invention relates to a radar filling level measuring device capable of generating and receiving an elliptically polarized wave and, as a special case, a circularly polarized wave, using a directional coupler which, according to a particular embodiment, m... | 01/17/2006 |
| 6904789 | Moisture detection apparatus and method A sensor to detect the presence of water or moisture in bulk materials includes a standard circuit board and a three element transmission line. The sensor electronics include an oscillator responsive to a direct current voltage supply which provides a square wave vo... | 06/14/2005 |
| 6690176 | Low-loss tunable ferro-electric device and method of characterization A tunable ferroelectric component and a narrowband resonant circuit for measuring the loss of the ferroelectric component. The ferroelectric component may be a capacitor integrated in the resonant circuit. The testing method eliminates other sources of lo... | 02/10/2004 |
| 6617860 | Apparatus and method for detecting electromagnetic wave source, and method for analyzing the same An electromagnetic wave source detecting apparatus may include a plurality of probes for measuring intensities of an electric field or magnetic field generated from an object to be measured at each measuring position. Calculation means may calculate a pha... | 09/09/2003 |
| 6538454 | Near field microwave resistivity microscope including a dielectric resonator A microwave microscope having a resonant slit formed in a highly conductive end of a microwave waveguide forming a probe tip. A short dielectric rod is fit into the waveguide near its conductive end. A longer dielectric rod is placed in back of the short ... | 03/25/2003 |
| 6396288 | 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). When a sample (22) has d... | 05/28/2002 |
| 6100703 | Polarization-sensitive near-field microwave microscope A microwave microscope for measuring electrical characteristics of a sample, such as a semiconductor wafer, with fine resolution. A probe includes a microwave waveguide capable of supporting the two lowest orthogonal modes from a microwave source, e.g. of... | 08/08/2000 |
| 6049211 | Method and apparatus for determination of fiber orientation in paper or paperboard web A method and apparatus for determination of orientation of fibers in a material such as a paper or paperboard web comprised of elongated fibers of high moisture content. The material is subjected to an alternating electric field (E) of the RF or microwave... | 04/11/2000 |
| 5543720 | Device for gauging the level of a fluid A device for gauging the level of a fluid in a container is described. It comprises a transmitter for transmitting a polarizable microwave signal through a first waveguide section, a receiver for receiving a reflected microwave signal, an electronic unit ... | 08/06/1996 |
| 5532604 | Dielectric constant measuring method and apparatus A method of measuring the dielectric constant of a sheet-like material is disclosed, the method using a cavity resonator having a transverse slit formed in the intermediate region thereof between the opposite ends for disposing a sample sheet perpendicula... | 07/02/1996 |
| 5394097 | Dielectric sensor Method and apparatus are described for obtaining information about the real and imaginary parts of permittivity in dielectric materials and relating this information to other properties of the materials.... | 02/28/1995 |
| 5337016 | Method and apparatus for traveling wave attenuation measurement A method and apparatus for traveling wave attenuation measurement in the UHF and VHF frequency bands. The test set up comprises a ramp structure located in the quiet zone of a parallel plate set up. The RAM specimen to be tested is attached to the top ram... | 08/09/1994 |
| 5144224 | Millimeter wave flow cytometer A method and apparatus for millimeter wave flow cytometry of a cell stream hydrodynamically focused in a zone of interaction with a millimeter wave source and complex ratiometric receiver. The cell stream is characterized by complex power wave scattering ... | 09/01/1992 |
| 5124662 | Particle classification employing plane polarized radiation applied in three orthogonal directions In the method, particles (16) are classified by locating them in a resonance cavity (10) and applying a swept range of microwave radiation to the cavity. The transmitted signals are detected and analyzed. The particle is then assigned to a classification ... | 06/23/1992 |
| 5063391 | Method of measuring chiral parameters of a chiral material Methods of measuring chiral parameters of chiral materials with chiral antennas are provided. These methods involve the use of parallel electric and magnetic dipoles to construct a point sensor in conjunction with the use of a turnstyle antenna as a sourc... | 11/05/1991 |
| 4942363 | Apparatus and method for measuring two properties of an object using scattered electromagnetic radiation A method and apparatus for monitoring two components of an object, such as moisture content and density in a tobacco rod, using scattered electromagnetic radiation are provided. The invention relies on the fact that both the real imaginary parts of the di... | 07/17/1990 |
| 4841223 | Method and apparatus for measuring fiber orientation anisotropy Apparatus for measuring fiber orientation anisotropy in a web of fibrous material includes a microwave generator, a waveguide through which a microwave signal is propagated axially and in which an electric field is established in one direction perpendicul... | 06/20/1989 |
| 4818930 | Method and apparatus for thin layer monitoring An apparatus and a method are provided for measuring the thickness (d) of a thin layer (12) of a non-metallic material on the surface of another medium (14). A transmitter (16) causes a beam of microwaves to be incident on the exposed surface (15) at an a... | 04/04/1989 |
| 4801862 | Method for measuring complex dielectric constant or complex magnetic constant of materials in three-dimensional directions Method for measuring complex dielectric or magnetic constant of materials in three-dimensional directions comprising the steps of: inserting a specimen held by a rotary holder into a slit which is provided in such a position corresponding to the antinode ... | 01/31/1989 |
| 4781063 | Method of measuring orientation of sheet or web like material A method of measuring the orientation of the constituents of specimens is disclosed, which includes the steps of preparing a cavity resonator in the form of a pair of waveguides forming a cavity, said waveguides being formed with a slit, inserting a speci... | 11/01/1988 |
| 4710700 | Method of measuring orientation or dielectric characteristic of dielectric sheets or webs A method of measuring the orientation or dielectric characteristic of a dielectric sheet or web is disclosed, with the steps of inserting a sample portion of the dielectric sheet or web in a small clearance in a cavity resonator formed of a pair of wavegu... | 12/01/1987 |
| 4707652 | Impurity detector measuring parallel polarized scattered electromagnetic radiation An impurity detector using scattered electromagnetic radiation from a sample of bulk material. It includes a generator of a narrow beam of modulated and linearly polarized electromagnetic radiation directed toward the sample. One or more radiation detecto... | 11/17/1987 |
| 4581575 | Method and apparatus for measuring orientation of constituents of webs or sheets A method and apparatus for measuring the orientation of the constituents of sheets are disclosed. The method comprises the steps of inserting a sheet into a small clearance with which the openings in a pair of waveguides are opposed to each other to form ... | 04/08/1986 |
| 4514680 | Flaw detection system using microwaves A method and an apparatus for detection of flaws in lumber is provided, in which the lumber is subjected to microwave radiation of equal intensity in turns simultaneously from two microwave radiation means in phase opposition and from an intermediate micr... | 04/30/1985 |
| 4500835 | Method and apparatus for detecting grain direction in wood, particularly in lumber A method and apparatus for detecting grain direction in wood particularly in lumber by means of high frequency radio energy like microwave radiation. The grain direction in lumber can be detected so that knots will cause no significant error to the measur... | 02/19/1985 |
