Broadband omnidirectional microwave antenna for minimizing radiation toward the upper hemisphere
It is a primary object of the present invention to provide an improved omnidirectional antenna which is a reflector-type antenna capable of operating over a wide frequency band, at relatively high pow... Read More
Inventors: Dienes, Geza;, Assignee: Andrew Corporation (Orland Park, IL) |
Circuit for reducing differential nonlinearities in multi-stage digital-to-analog converters
In the following detailed description and in the several figures of the drawing, like elements are identified with like reference numerals. Referring now to the block diagram of FIG. 1, shown therein... Read More
Inventors: Lucas, Charles H.;, Assignee: Hughes Aircraft Company (Los Angeles, CA) |
Five-level switched-capacitor DAC, method of operation thereof and sigma-delta converter employing the same
To address the above-discussed deficiencies of the prior art, the present invention provides a DAC and a method of converting digital numbers to analog equivalents. In one embodiment, the DAC includes... Read More
Inventors: Ju, Peicheng; Nagaraj, Krishnaswamy;, Assignee: Lucent Technologies, Inc. (Murray Hill, NJ) |
D/A conversion circuit having n switches, n capacitors and a coupling capacitor
The present invention has been made in view of the above problems, and has an object to provide a D/A conversion circuit which can make its area small. The DAC of the invention will be described below... Read More
Inventors: Tanaka, Yukio;, Assignee: Semiconductor Energy Laboratory Co., Ltd. (JP) |
Pipelined analog-to-digital converters with gain-matching structures
The present invention is directed to pipelined ADC system embodiments which provide gain matching structures that substantially eliminate gain errors between preceding and succeeding converter stages.... Read More
Inventors: Moreland, Carl W.;, Assignee: Analog Devices, Inc. (Norwood, MA) |
Corrosion-inhibited antifreeze/coolant composition
The invention claimed is: 1. A corrosion-inhibited antifreeze concentrate composition which inhibits general, pitting, crevice, and deposit-attack corrosion in the cooling system of a water-cooled int... Read More
Inventors: Van Neste, Walter A.; Maes, Jean P.; Vereecken, Rita;, Assignee: S.A. Texaco Petroleum NV (Brussels, BE) |
Sculpture mold
It has become a popular pasttime to produce various objects d'art by means of hobby craft kits, such as paint-by-number kits, jewelry-making kits, and the like. Such kits generally provide for a serie... Read More
Inventors: Elliott, James B.;, Assignee: Poly-Optics, Inc. (Santa Ana, CA) |
Unitary mold for making ice sculpture
The object of the present invention is to provide a unitary mold for making ice sculpture including a main mold made of elastomer having an inner cavity for making a model ice sculpture, an expansion ... Read More
Inventors: Tu, Chen-Hua;, Assignee: |
Device for mass production of ice carvings
OF THE PREFERRED EMBODIMENT Referring to FIGS. 1 and 2, the present invention comprises conveyor belt 10, die 20, cool water tank 30, freezing mixture tank 40, boring device 50, injection device 60, ... Read More
Inventors: Shih, Wen-Fang;, Assignee: |
Fluid for traction drive
An object of the invention is to provide a fluid for traction drive which is free from the problems as described above and meets various requirements. The present invention relates to a fluid for trac... Read More
Inventors: Tsubouchi, Toshiyuki; Hata, Hitoshi;, Assignee: Idemitsu Kosan Company Limited (Tokyo, JP) |
Channeling method and apparatus
It is an object of the present invention to provide a channeling method for introducing a precision DME service in the TACAN band, which service can operate independently of the current TACAN system o... Read More
Inventors: LeGrand, Jesse S.;, Assignee: International Telephone and Telegraph Corporation (Nutley, NJ) |
Oversampling A/D converter comprising an additional capacitor switched in synchronism with switchin of an input capacitor
It is therefore an object of the present invention to provide an oversampling analog-to-digital converter which is operable at a high oversampling frequency. It is another object of this invention to ... Read More
Inventors: Kuraishi, Yoshiaki;, Assignee: NEC Corporation (Tokyo, JP) |
Screw type vacuum pump with introduced inert gas
Accordingly an object of the present invention is to provide a screw type vacuum pump which can prevent such reaction products from accumulating on inner surfaces thereof so as to improve its reliabil... Read More
Inventors: Naya, Koutarou; Shiinoki, Kazuaki; Hayakawa, Tadashi; Masujima, Kiyoshi; Uchida, Riichi; Matsubara, Katsumi;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Target radar reflector
This invention has been arrived at by consideration of the above mentioned requirements and seeks to provide a radar reflector which provides effective reflection of signals received from any directio... Read More
Inventors: Firth, John H.;, Assignee: |
Satellite signature suppression shield
In order for camouflage to be effective, the target must blend in with the background by incorporating similar visible, laser, radar, and infrared signatures. On earth, such backgrounds typically incl... Read More
Inventors: Eldridge, Morton T.; McKechnie, Karl H.; Hefley, Richard M.;, Assignee: Teledyne Industries, Inc. (Los Angeles, CA) |
Weather radar axonometric display mode implementation
It is an object of this invention to provide a weather radar display mode implementation which combines a horizontal plan view with a vertical side view into a single axonometric display of a weather ... Read More
Inventors: Michie, Terry K.;, Assignee: AlliedSignal Inc. (Morris Township, Morris County, NJ) |
Internet protocol based 911 system
The present invention provides software applications that communicate with Global Positioning Systems ("GPS") hardware embedded in Internet Protocol ("IP") enabled equipment such that when the equipme... Read More
Inventors: Cleghorn, Monica;, Assignee: |
Low angle radar processing means
The present invention comprises improved means for processing a low elevation target signal received by a radar array by, in essence, subtracting from the received signal signals derived from estimate... Read More
Inventors: Sawatari, Takeo; Keating, Patrick N.; Steinberg, Ronald F.; Mueller, Rolf K.;, Assignee: The Bendix Corporation (Southfield, MI) |
Method and apparatus for detecting and decoding transponder reply signals
In view of the aforementioned objectives, the invention contemplates, in one embodiment, apparatus for detecting and decoding reply signals of the type having a plurality of associated time discrete p... Read More
Inventors: Moussa, Joseph; Schleder, William E.; Thwaits, Richard;, Assignee: B. F. Goodrich FlightSystems, Inc. (Columbus, OH) |
Psuedo-color display for enhanced visual target detection
A pseudo-color display apparatus for the display of image data employs pseudo-color remapping to enhance image interpretation. The apparatus includes a color display apparatus such as a color CRT resp... Read More
Inventors: Haugen, Marc D.; Morelock, Robin L.;, Assignee: Hughes Aircraft Company (Los Angeles, CA) |
Broadband circularly polarized dielectric resonator antenna
In accordance with an embodiment of the invention there is provided a radiating antenna comprising: a) a dielectric resonator antenna having a bottom surface and outer surfaces and designed to be capa... Read More
Inventors: Oliver, Matthew Bjorn; Antar, Yahia Mohamed Moustafa; Mongia, Rajesh Kumar; Ittipiboon, Apisak;, Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister (Ottawa, CA) |
Frequency selective TDOA/FDOA cross-correlation
An object of this invention is the provision of a robust, reliable digital signal processing system for identifying a signal of interest in an environment of dense interfering signals which only parti... Read More
Inventors: Desiardins, Gerard A.;, Assignee: Lockheed Martin Corporation (Bethesda, MD) |
Method and apparatus for calibrating location finding equipment within a communication system
OF THE DRAWINGS To overcome the problems described above error vectors are added to any position estimate determined by Location finding equipment (LFE) in order to give a corrected position estimate... Read More
Inventors: Mitzlaff, James Edward; Toone, John Duncan;, Assignee: Motorola, Inc. (Schaumburg, IL) |
Compensation of direction finding estimates for polarimetric errors
OF THE PREFERRED EMBODIMENT Consider the simple case of a two element interferometer, where each element is aligned with the baseline, and with a source lying directly ahead of the two elements on a ... Read More
Inventors: Owens, Mark A.;, Assignee: Raytheon Company (Lexington, MA) |
Anatomical restoration dental implant system with interlockable various shaped healing cap assembly and matching abutment member
The present invention is an anatomical restoration dental implant system with an interlockable various shaped healing cap assembly and a matching abutment member. It is known that one of the common fe... Read More
Inventors: Daftary, Fereidoun;, Assignee: |
Method and apparatus for constructing pyramid
I claim: 1. A method for forming a pyramid having four triangular faces of equal area, comprising the steps of (a) forming fold lines on a circular piece of material having a circular front surface an... Read More
Inventors: Busse, William E.;, Assignee: |
Local compensation of failed elements of an active antenna array
Accordingly, it is an object of the invention to improve antenna systems; It is another object of the invention to improve performance of active antenna arrays; It is another object of the invention t... Read More
Inventors: Julian, Michael D.;, Assignee: Hughes Aircraft Company (Los Angeles, CA) |
Three-pulse MTI without blind speeds
Briefly, the present invention comprises a moving-target indicator with no blind speeds which compensates for antenna scan modulation. The MTI system comprises a circuit for generating a first, second... Read More
Inventors: Lewis, Bernard L.;, Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC) |
Disposable right angle dental handpiece
According to the present invention, a disposable right angle handpiece comprises an outer housing made of disposable plastic material and having an elongated opening therein for receiving a drive shaf... Read More
Inventors: Meller, Moshe; Feldman, Michael;, Assignee: Meller; Moshe (Lakewood, NJ) |
Broadband data modulation system
OF THE INVENTION In testing and evaluating radar systems it is necessary to simulate very realistically to the radar the flights of aircraft and missiles that the radar is to sense and keep track of.... Read More
Inventors: Redman, Charles M.; Moore, Ronald W.;, Assignee: The United States of America as represented by the Secretary of the Army (Washington, DC) |
Radio 
