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7603088 Multi-channel radiometer imaging system and MMIC chips for use thereof  
A MMIC includes at least one quadrature hybrid in a plurality of series connected amplifiers connected in two parallel gain stages and operatively connected to the at least one quadrature hybrid...
7460063 Interferometric radiometer  
A space-borne interferometric radiometer for imaging a radiation emission from a target scene (ED), comprising a plurality of receiving elements arranged in a two- or three-dimensional array (REA),...
7402794 Radiometer imaging system and method thereof  
A radiometer imaging system includes an antenna array having a plurality of sub-arrays, each being formed of a plurality of antenna elements arranged in a sub-Y-type, a receiver array having the...
7221139 Multi-channel radiometer imaging system  
A radiometer system includes a housing and an RF board contained within the housing. Balanced radiometer channels receive an unknown signal and known reference. Each balanced radiometer channel...
7190444 System and method of measuring field-of-view of an optical sensor  
A method of measuring a field-of-view (FOV) of an optical sensor includes the steps of: (a) uniformly illuminating a FOV of the optical sensor; (b) moving, at an angle of motion, a slit across the...
6900756 Calibrating radiometers  
Radiometers detect radio wavelength electromagnetic radiation and typically have an antenna ( 16 ), an amplifier ( 18 ) and a detector ( 20 ). All three of these components have response...
6861978 Method and system for mutual coherent synthetic aperture radiometry  
Method and system for synthetic aperture radiometry not limited by the Van Cittert-Zernike theorem and the quasi-monochromatic assumption. A radiometer system ( 300 ) for imaging the emissions from...
6834991 Radiometer with programmable noise source calibration  
Apparatus and a method for radiometric temperature measurement comprises a radiometer receiver coupled to an antenna/calibration switch that has coupled thereto a brightness temperature signal. A...
6593876 Adaptive microwave antenna array  
An antenna array of “n” individual parabolic dishes is arranged about a center in subarrays extending in North, East, South and West rows. Signals received by the antennas are combined into...
6563462 Millimeter-wave camera for radiometric imaging and communications  
An imaging system ( 10 ) that includes a passive millimeter-wave camera ( 14 )employing a focal plane array ( 60 ) of millimeter-wave integrated circuitry receivers ( 32 ). The camera ( 14 ) images...
6529158 Aperture synthesis radiometer and method of controlling same  
An aperture synthesis radiometer operating in fully polarimetric mode. The measuring receivers are connected selectively to the polarization ports of the array elements following selected switching...
6456226 Nowcast of conviction-induced turbulence using information from airborne radar  
A convection induced turbulence (CIT) detection system performs a nowcast algorithm to detect CIT along the flight path of an aircraft using power returns from an airborne whether radar. Additional...
6439763 Variable microwave cold/warm noise source  
A radiometer calibrating system utilizes an adjustable noise source for calibrating a radiometer. The noise source includes a transistor configured as a noise equivalent circuit having a gate port,...
6377207 Passive polarimetric microwave radiometer for detecting aircraft icing conditions  
The passive polarimetric microwave radiometer is a simple and low cost radiometric icing detection system that operates over a suitable set of frequency bands in the millimeter wave region of the...
6373558 Passive ranging to a target reflecting solar radiation  
A passive ranging system measured spectra of solar radiation off an adjacent spot and a distal target. Reflected solar radiation and differential attenuation are used to estimate target range. A...
6308043 Wireless communication link quality forecasting  
Apparatus and method for forecasting the quality of radio communication links on a short-term basis are disclosed, the apparatus including at least one, and preferably an ensemble of, sensors...
6307502 Radiometry system with an aperture synthesis type antenna and its application to hyper-frequency imaging  
A radiometry system including an aperture synthesis antenna array type, including plural antenna elements, distributed in an antenna plane relative to at least one axis, according to a determined...
6275283 Passive ranging to source of known spectral emission to cue active radar system  
A passive ranging optical system is coupled to an active radar system. The passive ranging optical system provides range and rate information to the active radar system. After receiving the range...
6192322 Moving object and transient event detection using rotation strip aperture image measurements  
A spinning strip aperture imaging radiometer sensor system and data processing methods for detecting moving objects derived from a plurality of image frames acquired by a strip aperture imaging...
6155704 Super-resolved full aperture scene synthesis using rotating strip aperture image measurements  
A spinning strip aperture imaging radiometer sensor system and data processing method for synthesizing a super-resolved scene estimate (super-resolved scene) from a plurality of image frames...
6137440 Microwave active solid state cold/warm noise source  
A microwave active noise source and method used for calibrating a radiometer includes a transistor configured as a noise equivalent model having a gate port, drain port and source port. During...
6133869 Passive technique for the remote detection of buried objects  
A technique is provided for passively detecting the presence and location of an underground object. A plurality of individual antennas positioned in a linear array are directed to receive fields of...
6057799 Interferometric hyperfrequency radiometry system with mechanical scanning  
The invention concerns an interferometric hyperfrequency radiometry system comprising an antenna being subject to a rotation movement around the vertical direction, with a boresight axis forming an...
6031498 Antenna pattern measurement method and device  
This invention relates to a process for measuring an antenna diagram in which: the antenna (30) is connected to a receiver (33) capable of supplying C/No measures (the ratio of the useful signal...
5999122 Millimeter wave instant photographic camera  
A photographic camera (10) that generates still photographs or images of a scene by detecting millimeter-wave radiation (16). The camera (10) includes an imaging lens (14) that collects the...
5999121 Radiometer and water indicating method  
A radiometer and a method for indicating water content and water content change caused by water and/or liquid water are disclosed. According to the method, changes of noise temperature values are...
5959548 Electromagnetic signal pickup device  
An electromagnetic pickup device (64) for receiving electromagnetic signals (62) is disclosed that comprises an H-field probe (68) having an end (78) the is insertable into the earth (16) for...
5943007 Rotating mirror drum radiometer imaging system  
A rotating mirror drum radiometer imaging apparatus. The apparatus generally comprises a two-sided mirror, a drum for securely supporting the two-sided mirror therein at an angle of preferably...
5886664 Method and apparatus for detecting mines using radiometry  
A radiometric data acquisition and display system is provided. The system has a detector assembly with a boom. A radiometer is connected at an end of the boom. The radiometer has a sensor head...
5724044 Electrically scanning microwave radiometer  
An electrically scanning microwave radiometer (ESMR) is mounted in a flying body orbiting a planet and operative to measure the surface of the planet. A receiving antenna having its cylindrical or...
5724043 Variable frequency microwave tropopause sensor system and method  
An apparatus for measuring the properties of the tropopause includes a variable frequency microwave radiometer operating over a range of from about 118.0 to about 119.0 GHz. The radiometer receives...
5430448 Object detection system  
A detection system will detect and identify self-propelled objects, such as missiles, which create a hot exhaust plume. The exhaust plume has radiation which flickers with a frequency range of...
5394157 Method of identifying antenna-mode scattering centers in arrays from planar near field measurements  
A method of identifying antenna-mode scattering centers in an aperture device or array from planar near field measurements. Antenna-mode scattering centers may be determined for aperture...
5365237 Microwave camera  
A camera system in which microwave radiation from objects in a field-of-view is collected by an antenna having beam directions which are a function of the beam frequency. The collected radiation is...
5282013 Passive ranging technique for infrared search and track (IRST) systems  
In an IRST system, a determination of the range and type of a detected target may be made as follows. Atmospheric transmittance and background spectral radiance is estimated from available...
5280291 Thermodynamics-based signal receiver  
The thermodynamics-based signal receiver transforms contiguous segments of a received signal into thermodynamics-related quantities using an analog of a statistical-mechanics-related quantities...
5243351 Full aperture image synthesis using rotating strip aperture image measurements  
A spinning strip aperture imaging radiometer sensor system and data processing method that is capable of synthesizing full circular aperture images from a plurality of image frames acquired by the...
5231404 Dual-polarized cross-correlating radiometer and method and apparatus for calibrating same  
A dual linearly-polarized cross-correlating radiometer including an apparatus for calibrating the cross-correlating channel of the radiometer is described. The apparatus for calibrating the...
5227800 Contraband detection system  
A contraband detection system especially suited for detecting concealed non-metallic contraband such as ceramic or plastic weapons or illegal drugs carried by a person is disclosed. Plural sources...
5218357 Miniature modular microwave end-to-end receiver  
An end-to-end microwave receiver system contained in a single miniature hybrid package mounted on a single heatsink, including an input end connected to a microwave receiver antenna and an output...
5202692 Millimeter wave imaging sensors, sources and systems  
A millimeter wave imaging system is disclosed which has wide applicability throughout transportation and related industries. For example, the system may be used to provide an aircraft pilot with an...
5160934 Cross-switched MICRAD seeker  
A MICrowave RADiometric (MICRAD) guidance system is disclosed which utilizes an antenna having four beams, designated right, left, up and down. Information from the four beams is monitored...
5142291 Passive microwave near-field tomographic imaging system and method  
A technique for near-field tomographic imaging using a multiple-receiver correlating interferometer. A target object or scene to be imaged is located in a near-field or Fresnel region of a receiver...
5134415 Switchable local oscillator for shared mixer radiometers  
A switchable local oscillator for use in a shared mixer radiometer is capable of providing at least two separate frequencies. The local oscillator contains at least two cavity resonators, a voltage...
5121124 Microwave camera  
A camera system in which microwave radiation from objects in a field-of-view is collected by an antenna having a beam direction which is a function of the beam frequency. The collected radiation is...
5086300 Method and system for passive detection of electromagnetic events associated with destructive devices  
The apparatus of the invention detects, characterizes and evaluates electromagnetic radiation, primarily in the radio frequency range, which is emitted by the fusing portion of the explosive train...
5081456 Method of detecting unknown object and apparatus therefor  
In visualizing an unknown object possessed by a person to be checked, a narrow pulsating radio wave beam is scanned over the whole surface of the person to observe the intensity of a reflected...
5072226 Radiometer system incorporating a cylindrical parabolic reflector and minimum redundancy array feed  
A radiometer system is disclosed, the system incorporating a cylindrical parabolic reflector and a plurality of radiation sensors disposed along the focal line of the reflector in a minimum...
5053781 High resolution passive microwave sensors for earth remote sensing  
The present invention is a microwave radiometer for passive microwave remote sensing of the earth's surface. This microwave radiometer is formed as a cross array including a vertical linear array...
5047783 Millimeter-wave imaging system  
An improved millimeter imaging system is disclosed which generates high quality images from the field of view. Such system can be employed in a variety of application ranging from providing an...
Matches 1 - 50 out of 147 1 2 3 >