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| Number | Title | Issue Date |
| 6297772 | Predicting coherent sidelobe canceller A system for instrumenting time sampled predicting interference suppression, particularly in a side-lobe canceller system. Main and auxiliary channel signals are supplied to a canceller loop where correlating weights are sampled just prior to a radar puls... | 10/02/2001 |
| 6011514 | Means for extracting phase information for radio frequency direction of arrival The extraction of phase information for radio frequency (RF) direction of rival is attained by pre-detect sensing and quantization of differential phase of a RF wave impinging on two or more antenna apertures, based on sensing and encoding differential ph... | 01/04/2000 |
| 5973653 | Inline coaxial balun-fed ultrawideband cornu flared horn antenna The inline coaxial balun fed cornu flared horn antenna is formed by transitioning a coaxial transmission line to a parallel-plate transmission line with a Klopfenstein impedance profile and terminating with a flared horn antenna based on a scaled cornu sp... | 10/26/1999 |
| 5966089 | Wrapping of soft chaff muffin for supersonic deployment A means for preventing the opening of a chaff muffin upon its entry into air stream of its supersonic-velocity carrier rocket, said means comprising a longitudinal wrapping in addition to the usual circumferential wrapping.... | 10/12/1999 |
| 5955849 | Cold field emitters with thick focusing grids A field emitter for producing an electron beam includes at least one cold cathode unit. Each of the cold cathode units includes an emitter cone having an emitter tip and a gate spaced apart from the emitter tip for extracting electrons from the emitter ti... | 09/21/1999 |
| 5943001 | Swept comb method of jamming An improved countermeasure technique for providing jamming signals against obing radar, especially COSRO (conical scan on receive only) radar. A power spectrum (or comb) is generated having specific spectral line separation over a frequency band of the exp... | 08/24/1999 |
| 5939958 | Microstrip dual mode elliptic filter with modal coupling through patch spacing Disclosed is a planar dual mode microstrip filter with the coupling between similar modes on different patches governed by the spacing between the patches rather than by microstrip coupling lines between the patches. The patches are shaped to allow dual m... | 08/17/1999 |
| 5917970 | Wavelength multiplexed, electro-optically controllable, fiber optic multi-tap delay line The wavelength multiplexed, electro-optically controllable, fiber optic multi-tap delay line utilizes a first output signal from a plurality of amplitude adjustable continuous-wave (CW) optical lasers multiplexed to form a combined optical signal onto whi... | 06/29/1999 |
| 5914912 | Sonar array post processor The sonar array post processor employs an adaptive processing, known as matched beam processing, in the beam domain which takes analog or digital conventional beamforming outputs from a sonar array, multiplies them by a set of adaptive weighting coefficie... | 06/22/1999 |
| 5905204 | Test specimen design incorporating multiple fracture sites and multiple strain material fractures A material test specimen design is taught for the determination of critical train and stress states for multiaxial fracture. The objective of the specimen is to increase the amount of data obtained per specimen while retaining simplicity in testing procedu... | 05/18/1999 |
| 5903349 | Fiber optic accelerometer sensor and a method of constructing same The interferometric fiber optic accelerometer is viewed as a mass-spring transducer housed in a sensor case. The sensor case is attached to a moving part whose motion is inferred from the relative motion between the mass and the sensor case. A flexural di... | 05/11/1999 |
| 5885367 | Retractable thin film solar concentrator for spacecraft A solar concentrator having flexible retractable reflector panels of a thin lastic film coated with aluminum or silver configured as a trough along the long edges of the solar panel and tilted so as to direct the reflected sunlight onto the solar panel in ... | 03/23/1999 |
| 5856630 | High velocity electromagnetic mass launcher having an ablation resistant insulator A railgun having a composite insulator of laminated materials positioned between the rails. The composite insulator is comprised of a series of conducting layers oriented with the edges toward the bore, or barrel, of the railgun and their wide edges away ... | 01/05/1999 |
| 5844161 | High velocity electromagnetic mass launcher having an ablation resistant insulator A railgun having a composite insulator of laminated materials positioned between the rails. The composite insulator is comprised of a series of conducting layers oriented with the edges toward the bore, or barrel, of the railgun and their wide edges away ... | 12/01/1998 |
| 5825489 | Mandrell based embedded planar fiber-optic interferometric acoustic sensor This invention is an optimized planar fiber optic sensor utilizing robust design having high acoustic sensitivity and reduced acceleration response over that found in the prior art. A continuous optical fiber sensing arm is wrapped around a plurality of m... | 10/20/1998 |
| 5804475 | Method of forming an interband lateral resonant tunneling transistor This invention describes a nanometer scale interband lateral resonant tunneling transistor, and the method for producing the same, with lateral geometry, good fanout properties and suitable for incorporation into large-scale integrated circuits. The trans... | 09/08/1998 |
| 5652431 | In-situ monitoring and feedback control of metalorganic precursor delivery The in-situ monitoring of metalorganic precursor delivery in a metalorganic chemical vapor deposition oxide system in high temperature super conductors (HTSC) film growth is accomplished by utilizing the distinct absorbance bands for metalorganic compound... | 07/29/1997 |
| 5552787 | Measurement of topography using polarimetric synthetic aperture radar (SAR) The polarimetric technique of measuring azimuth direction terrain slopes utilizes a polarimetric synthetic aperture radar (SAR) to provide a direct measure of terrain azimuthal slopes and a derived estimate of terrain elevation. Utilizing this measure of ... | 09/03/1996 |
| 5535815 | Package-interface thermal switch The package-interface thermal switch (PITS) is an active temperature cont device for modulating the flow of thermal energy from satellite equipment, such as electronic modules or batteries, to the satellite mounting deck which serves as a heat sink. PITS... | 07/16/1996 |
| 5535176 | Method and system for sensing with an active acoustic array A method and system provide for the sensing of objects under water where the acoustic energy is suitably focused or directed so that reverberation returns are minimized. A vertical source array of adjustable acoustic sources is located in the water body, ... | 07/09/1996 |
| 5526170 | Fiber optic continuous true time-delay modulator The fiber optic true time delay modulator generates a continuously variable true time-delay (i.e., phase shift) by utilizing the dispersion characteristic of a single mode optical fiber. The signal to be variably delayed modulates a continuous wave optica... | 06/11/1996 |
| 5517315 | Reflectometer employing an integrating sphere and lens-mirror concentrator A reflectometer wherein a light having a predetermined wavelength is projected into an integrating sphere containing a sample whose reflectance is to be measured. As the projected light strikes the sample, rays are reflected back the walls of the integrat... | 05/14/1996 |
| 5473340 | Apparatus for displaying a multi-color pattern An apparatus for displaying a multi-color pattern within a single device is shown and described. The apparatus utilizes an electrochromic light valve which comprises electrodes that cover a photoconductive layer and a two-dimensional plurality of electroc... | 12/05/1995 |
| 5467814 | Graphite/epoxy heat sink/mounting for common pressure vessel The graphite-epoxy heat sink and mounting structure is comprised of a mounting structure constructed of a graphite-epoxy material that is mounted around a heat generating pressure vessel located inside a spacecraft. The mounting structure is a graphite-ep... | 11/21/1995 |
| 5459321 | Laser hardened backside illuminated optical detector A protective layer laser hardens an optical detector. The material for the rotective layer is Hg1-Y CdY Te, where Y is selected so that the band gap of the protective layer is higher than the expected energy level for photons impingin... | 10/17/1995 |
| 5448643 | Authenticaton system A system for secure communications between first and second locations where he first location measures the location of the second location. The first location then codes that measured location along with a random reply channel code for communications from ... | 09/05/1995 |
| 5440414 | Adaptive polarization diversity detection scheme for coherent communications and interferometric fiber sensors A method and apparatus for overcoming polarization induced signal fading in both heterodyne communication and interferometric sensing. An adjustable birefringent element in series with a linear-polarization beam splitter forms an elliptical-polarization b... | 08/08/1995 |
| 5428358 | Apparatus and method for ionospheric mapping This invention is a unique single-site method of determining the local total electron content (TEC) of the ionosphere and its space-time variation using a global positioning system (GPS) ionospheric receiver. The TEC of the ionosphere is specified in term... | 06/27/1995 |
| 5404064 | Low-frequency electrostrictive ceramic plate voltage sensor A stress-driven electrostrictive ceramic low-voltage plate voltage sensor based on the principle of the field-coupling between the strain and polarization in the ceramic material of the device. Application of a dithering or driving voltage to a piezoelect... | 04/04/1995 |
| 5379109 | Method and apparatus for non-destructively measuring local resistivity of semiconductors An apparatus for non-destructively measuring resistivity of a semiconductor, such as InP, comprises light sources for illuminating a preselected portion of the semiconductor with first and second light beams, each of a preselected single wavelength, the f... | 01/03/1995 |
| 5378962 | Method and apparatus for a high resolution, flat panel cathodoluminescent display device A high resolution, cathodoluminescent display screen or device and a method of producing such a display device is disclosed. The display screen includes a plurality of channel structures having longitudinal ends, a transparent medium formed in a plane to ... | 01/03/1995 |
| 5371542 | Dual waveband signal processing system A dual waveband signal processing system (DWSPS) is disclosed for differentiating between an primary target signal and background clutter to detect targets and objects with a particularly unique spectral characteristic. The DWSPS is responsive to a plural... | 12/06/1994 |
| 5367376 | Planar and linear fiber optic acoustic sensors embedded in an elastomer material A interferometric planar and linear fiber optic sensor system comprised of a sensor element and a reference element. In the planar fiber optic sensor system the sensor and reference fibers are shaped in loops circularly and uniformly, heat treated or bond... | 11/22/1994 |
| 5360235 | Secret optical marking An optical marking system in which objects are coated with materials for purposes of applying secretly coded marks on the objects. The coating materials are transparent in daylight and have the property of absorbing ultraviolet light. When such material... | 11/01/1994 |
| 5359256 | Regulatable field emitter device and method of production thereof A non-power generating current limiting device such as a field effect transistor is provided to output a regulated current in dependence upon a control voltage. An electron field emitter is connected to a drain or output of the non-power generating curren... | 10/25/1994 |
| 5353291 | Laser synchrotron source (LSS) The laser synchrotron source (LSS) utilizes a high peak power or high average power laser to generate within a vacuum chamber a laser beam travelling in one direction to interact with an electron beam traveling in an opposite direction in order to generat... | 10/04/1994 |
| 5339057 | Limited bandwidth microwave filter A limited-bandwidth microwave transversal or recursive filter, compatible with microwave monolithic integrated circuit (MMIC) design requirements is described in this invention. The device comprises a means to split an incident signal into multiple parts ... | 08/16/1994 |
| 5335258 | Submicrosecond, synchronizable x-ray source In the submicrosecond, synchronizable x-ray source a high intensity pulsed laser is focused onto a negatively biased laser target, at high irradiance in a vacuum, producing high temperature plasma from which electrons are emitted. The emitted electrons ar... | 08/02/1994 |
| 5305075 | Magnetostrictive transducer system having a three dual-strip fiber optic magnetostrictive transducers bonded into a single fiber mach-zehnder interferometer The fiber-optic magnetostrictive transducer system consists of a sensing element having three dual-strip fiber optic magnetostrictive transducers bonded into a single fiber Mach-Zehnder interferometer operating single mode mounted in a symmetrical orthogo... | 04/19/1994 |
| 5259061 | Fabrication and phase tuning of an optical waveguide device The manufacture of an optical waveguide device utilizing a fast, accurate method for tuning of the output phase angle of such devices to a desired operating point. Tuning is accomplished by adjusting the accumulated phase along a waveguide arm of the devi... | 11/02/1993 |
