| Patent Number |
Title Of Patent |
Date Issued |
| 5257031 |
Multibeam antenna which can provide different beam positions according to the angular sector of |
October 26, 1993 |
| A multibeam antenna, which has a high switching capability with high RF power levels, consisting of three subarrays (5,6,7) which suitably spaced, assure angular coverage in the azimuth hemispace from 0.degree. to 180.degree.. A single beam forming network (2, 3) provides each subarray |
| 5142150 |
Horizon sensor for satellites using superconductor(s) having a high critical temperature |
August 25, 1992 |
| A horizon sensor for spaced-based satellites consisting of a high critical temperature superconductor which changes temperature based upon its exposure to space-based radiation. The horizon sensor may be flexibly positioned along the outer surface of the space- based satellite. As the |
| 5126705 |
RF partitioning network for array antennae |
June 30, 1992 |
| A lightweight mechanical structure is provided for supporting an RF partitioning network for a large dimension array antenna. The network consists of two horizontally disposed stripline RF dividing circuits positioned in two enclosed portions of the network. The network is formed wit |
| 5115208 |
PLL clock signal regenerator using a phase correlator |
May 19, 1992 |
| A circuit for the regeneration of the clock signal within a message containing a preamble and random data. No assumption as to the message structure is required for the operation of such a circuit. The circuit operates on an autocorrelation principle which allows a voltage controlled |
| 5107269 |
Device for the automatic correction of the differential error, to be applied preferably to monop |
April 21, 1992 |
| A device for automatic correction of differential and deterministic errors in a radar receiver, preferably a monopulse radar receiver, which comprises a closed loop feedback system in which raw Off-Boresight Angle (OBA) data as well as current azimuth data are accumulated, averaged and |
| 5073359 |
Process for manufacturing ceramic magnetic material |
December 17, 1991 |
| A process for the manufacture of ceramic materials by production of the citrates and pyrolysis thereof. Specifically, the process yields ultra-fine powders by preparing solutions of respective oxides and/or carbonates in nitric acid, either separately or together; adding citric acid |
| 5068569 |
Wave guide device having a periodic structure and improved heat dissipation |
November 26, 1991 |
| An element with periodic structure for guiding electromagnetic waves propagating along a longitudinal axis of the structure at a speed below the velocity of light is disclosed. The structure includes a series of metal polar expansions aligned with the mentioned axis and forming a plu |
| 5061931 |
Recursive system for image forming by means of a spotlight synthetic aperture radar |
October 29, 1991 |
| Recursive system for the forming of a radar image by means of a SAR sensor, for application preferably related to the radar field, essentially having a monodimensional transformation system (1) of the signal received by the radar; a convolution element (2) of the same signal by means of |
| 5000774 |
Method of masked two stage lithium niobate proton exchange |
March 19, 1991 |
| Lithium niobate is Li.sup.+ /H.sup.+ proton exchange in two stages. The first masked stage is a treatment with benzoic acid followed by a thermal treatment in oxygen at about 400.degree. C. The thermal treatment is followed by masking a second coincident area and treating that area in a |
| 4928208 |
Housing and connection device for electronic modules |
May 22, 1990 |
| A housing and connection device for electronic modules consisting of two parts, one of which is fixed and the other of which is movable. The movable part is detachably connected to the fixed part via a hook and pivot, and screw. The inside of the movable part contains a series of par |
| 4926184 |
Angle measurement device for amplitude monopulse receivers |
May 15, 1990 |
| Device for angle measurement for inclusion within a monopulse amplitude comparison radar receiver for particular application within secondary radars. In essence it consists of a log (.SIGMA.) signal comparator (9) against a detection threshold, which is meant to enable further proces |
| 4906325 |
Method of making single-crystal mercury cadmium telluride layers |
March 6, 1990 |
| A method of making symmetrical mercury cadmium telluride layers by epitaxial growth on a cadmium telluride substrate, performed inside a reactor with two communicating zones, kept at different and controlled temperatures. Growth solution is directly prepared inside the reactor by sub |
| 4896159 |
Radar system with pulse-to-pulse frequency agility and multiple-time-around echo resolution |
January 23, 1990 |
| Device for radar utilized to detect multiple-time-around echoes with the capability of transmitting in frequency agility and, besides the advantages due to this type of technique, further, capable of reading the ambiguity of distance directly by separating in frequency the multiple-t |
| 4872943 |
Process for making monocrystalline HGCDTE layers |
October 10, 1989 |
| A process for making single-crystal mercury cadmium telluride layers by epitaxial growth on a cadmium telluride substrate, performed inside a reactor with two communication zones, kept at different and controlled temperatures. The growth solution is directly prepared inside the reactor |
| 4866448 |
Signal processor for synthetic aperture radar, particularly for parallel computation |
September 12, 1989 |
| This invention concerns a synthetic aperture radar system within which focussing processing is achieved through the use of filter banks, based upon undersampling and polyphase networks. The focussing operation consists of the correlation of the datum with system response to a point s |
| 4818724 |
Photolithographic method of aligning a structure on the back of a substrate |
April 4, 1989 |
| A method of making semiconductive developments, especially MESFETs, which applies a template to a surface of the substrate previously formed with circuit elements in alignment with these elements and so bonds the template to the substrate that the template can be utilized as a holder |
| 4796262 |
Optical resonator using a passive Q switch or other optical element with low-damage threshold |
January 3, 1989 |
| An optical resonator for a power laser comprises between one of a pair of totally reflecting mirros flanking the end of a pumped active element such as a Nd:YAG crystal, a passive Q switch and between the passive Q switch and the active element, a polarizer which reflects the output tran |
| 4774517 |
Voltage regulator for use in transmitters for radar applications |
September 27, 1988 |
| Voltage regulator which can compensate for the output voltage variation of a line modulator for use in transmitters for radar applications. The voltage variation in question is due to the modulation induced by the radar repetition frequency. This regulator is essentially made up of a |
| 4742353 |
Digital processor for radar signals which can perform adaptive suppression of clutter means of a |
May 3, 1988 |
| A digital processor for radar signals which can perform adaptive suppression of the disturbance clutter and enhancement of the useful signal of given Doppler frequency. It can approximate the principle of operation of the optimum processor, which is that processor which maximizes the |
| 4721924 |
Device for tuning a VCO to the carrier frequency of each radar pulse |
January 26, 1988 |
| An electronic device for rapidly tuning a voltage controlled oscillator to the radar carrier frequency of each of the individual radar pulses. A frequency discriminator (1) of the quadricorrelator type is supplied with the incoming pulses and with the output of the VCO (5) to provide the |
| 4719637 |
Laser doped with tripropylamine |
January 12, 1988 |
| In order of maintaining at the more constant level the CO.sub.2 content in the gaseous mixture discharge of a transversely excited atmospheric pressure laser, a polymer product is included in advance of the laser operation in the laser chamber or within the closed fluidtight circuit |
| 4719466 |
Adaptive radar signal processor for the detection of useful echo and the cancellation of clutter |
January 12, 1988 |
| Adaptive radar signal processor apt to detect the useful echo in the presence of an additive disturbance made up of clutter and noise, through which the disturbance can be cancelled and the useful signal can be enhanced by means of the synthesis of a filter, adapted to the useful sig |
| 4712109 |
Device for the identification of undesirable echoes in radar systems |
December 8, 1987 |
| A device for the detection of undesirable echoes which have significant correlation in azimuth which is applicable to surveillance or tracking radars. The device works through autocorrelation function estimation over a pair of pulses received by averaging, over N range cells, the complex |
| 4656477 |
Perfectioning in reply type radar systems, in particular the SSR type |
April 7, 1987 |
| The invention regards a perfectioning in reply type radar systems, in particular SSR (Secondary Surveillance Radar) or IFF (Identification Friend or Foe). The invention has as its aim that of eliminating or reducing undesired replies due to reflections from fixed obstacles or from st |
| 4636793 |
Adaptive MTD digital processor for surveillance radar |
January 13, 1987 |
| A digital MTD processor interposed between a coherent video detector and a signal extractor of a surveillance radar comprises a plurality of Doppler filters connected in parallel to the video-detector output, including a zero filter, working into respective modulus extractors connected b |
| 4616228 |
System for suppressing unwanted long-range and/or second-time-around radar echoes |
October 7, 1986 |
| A receiving section of a surveillance radar equipped with a power oscillator in its transmitting section comprises several registers for the storage of values, perferably in complex digital form, representing the starting phase of a continuous wave at the instant of transmission of an |
| 4614923 |
Method of suppressing magnetostatic waves in magnetic garnet films for microwave circuit applica |
September 30, 1986 |
| Method for the controlled suppression of magnetostatic waves within magnetic garnet films for microwave circuit applications, based upon the adoption of multilayer structures of epitaxial garnet films of low magnetic losses and high magnetic losses. |
| 4594721 |
Corona discharge preionized high pulse repetition frequency laser |
June 10, 1986 |
| A sealed structure laser apparatus is disclosed which utilizes corona discharge as a pre-ionizing means wherein the laser discharge space is defined by a dielectric material channel with C cross section and one of the two discharge main electrodes is located along the inner wall of the C |
| 4559238 |
Method of making a field effect transistor with modified Schottky barrier depletion region |
December 17, 1985 |
| A method of making a field effect transistor with a modified metal semiconductor Schottky barrier depletion region wherein a GaAs semiconductive active layer on a semiinsulating substrate is supplied with a pair of ohmic contacts and with a gate or barrier electrode between the ohmic |
| 4544926 |
Adaptive jamming-signal canceler for radar receiver |
October 1, 1985 |
| A radar receiver, associated with a transmitter sending out circularly or linearly polarized waves, has two parallel channels for the respective processing of incoming echo signals derived from incident waves with mutually orthogonal linear (e.g. horizontal and vertical) polarization. |
| 4538907 |
Device for determining distance of area illuminated by pulsed laser |
September 3, 1985 |
| In order to determine the distance of a target, illuminated by a remote pulsed laser, from a nearby observation point, the time interval between the arrivals of a direct laser pulse and of a reflection of the same pulse from the target is measured along with the angle included between th |
| 4523291 |
Device for estimating the operating frequency of a source of recurrent signals |
June 11, 1985 |
| A device for estimating the scanning frequency of an unfriendly tracking radar of the conically scanning type comprises input circuitry for eliminating the d-c component of a detected radar signal and a sampler deriving a train of amplitude pulses from that signal which, after digiti |
| 4509176 |
Longitudinal-discharge-pulse laser with preionization obtained by corona effect |
April 2, 1985 |
| A longitudinal-discharge-pulse laser has two coaxial sections in the form of glass tubes joined together by a grounded central electrode and terminated by two outer electrodes. Each glass tube carries on its outer surface a multiplicity of metal rings connected in parallel, via a step-up |
| 4496949 |
MTI Radar adaptable to different environmental conditions |
January 29, 1985 |
| A radar of the MTI type has a transmitter connected to a source of outgoing pulses whose carrier frequency is variable under the control of a mode selector for selective operation with fixed frequency, frequency diversity or frequency agility, depending on detected environmental conditio |
| 4481864 |
Hydraulic jack with mechanical safety lock |
November 13, 1984 |
| A double-acting hydraulic jack, comprising a hollow piston reciprocable in a surrounding cylinder, includes a tubular shaft extending axially inside and carrying a nut of the circulating-ball type which coacts with a screw coaxially disposed in that shaft. The screw is rigid with the pis |
| 4475788 |
Coupling between laser and optical fiber |
October 9, 1984 |
| In order to focus the beam of a laser onto a receiving end of an optical fiber substantially coaxial therewith, the laser output is formed by a planoconvex lens with a semitransparent flat face confronting the laser cavity and an antireflecting curved face turned toward the fiber. Al |
| 4467290 |
Signal amplifier with wide linear dynamic range |
August 21, 1984 |
| A bipolar main transistor Q.sub.1 designed to amplify a high-frequency signal applied to its base, for driving a load connected to its collector lead, has its emitter connected through a low-ohmic feedback resistor R.sub.E to a point of stabilized potential constituted by the emitter of |
| 4451735 |
Cryogenic radiation detector with high-density conductor array |
May 29, 1984 |
| A detector for infrared radiation, having a multicell photosensor disposed at the top of a cold finger in an evacuated container, comprises a stack of annular ceramic layers coaxially surrounding the cold finger and serving as supports for several arrays of radially extending metallic |
| 4450566 |
Pre-ionizing trigger system for a gas laser |
May 22, 1984 |
| A pair of excitation electrodes in a laser cavity, filled with a gas mixture at substantially atmospheric pressure, are connected across a pumping capacitor by way of part of the winding of an autotransformer in series with a pre-ionizing device within the cavity acting as a trigger |
| 4433006 |
Process for oxidizing semiconducting compounds, especially gallium arsenide |
February 21, 1984 |
| In order to provide a semiconductive substrate such as gallium arsenide with an oxide layer, the substrate is positively biased in a plasma reactor in which an oxidizing gas is ionized by radiofrequency excitation while the substrate is heated to an elevated temperature increasing its |
| 4413163 |
Portable line tester for telecommunication system |
November 1, 1983 |
| A portable instrument for testing the integrity and measuring the attenuation of a subscriber line of a telecommunication system comprises a metering unit joined to a plug by which an associated service telephone can be connected across a line to be tested. The metering unit includes a |
| 4082637 |
Process for manufacturing semiconductor structures by sputter etching |
April 4, 1978 |
| A process for manufacturing semiconductor devices, particularly monocrystalline structures by sputter etching, wherein the electric discharge is effected in a rarefied atmosphere, the components of which are Argon and Hydrogen, or Argon and H.sub.2 O, or inert gas and a gas developin |
| 4006434 |
Microstrip circulator operating in the peripheral mode and having non-uniform biasing means |
February 1, 1977 |
| There are provided for radar applications microwave multigate junctions that utilize excitation of peripheral modes. The conductor structure is applied to a ferrite, that is magnetized perpendicularly to the plane of its mass. The arrangement presents, through adaptation between the TEM |
