Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7274326 | System for digital multi-bandwidth intermediate frequency processing and tracking Signal processing systems for radar installations are provided for simultaneous processing of one or more IF signals of dynamically varying frequency and bandwidth with a single analog signal path. The signal processing system includes, but is not limited to, a conv... | 09/25/2007 |
| 7209936 | Frequency locked digitally tuned oscillator synthesizer A synthesizer is disclosed and is digitally tuned and locked in a measured frequency. The synthesizer uses both the dual voltage control oscillator, each operating over less than an octave, in combination with the microwave doublers to produce a multi-octave RF outp... | 04/24/2007 |
| 7183949 | Analog baseband processor and method of processing analog baseband for use in multimode communication system Analog baseband processors and methods of processing an analog baseband for use in a multimode communication device are disclosed. The analog baseband processor includes a single (shared) analog-to-digital converter, and at least a first receiver digital front end a... | 02/27/2007 |
| 7148815 | Apparatus and method for detecting objects located on an airport runway An apparatus for detecting objects on an airport runway. The apparatus comprises a first transmitter adapted to be positioned adjacent to the runway, a first receiver adapted to be positioned adjacent to the runway, a processor operably linked to the first receiver,... | 12/12/2006 |
| 7081789 | Switched capacitor circuit compensation apparatus and method A compensated switched capacitor circuit comprises a switched capacitor circuit and a compensation circuit. The compensation circuit generates a reference current that varies under closed loop control to maintain a targeted slew rate for charging a reference capacit... | 07/25/2006 |
| 6469654 | Transponder landing system A ground-based, precision aircraft landing system provides CAT I precision approach and landing guidance. The aircraft elevation position is determined by measuring differential carrier phase and time-of-arrival of the aircraft ATCRBS transponder reply. T... | 10/22/2002 |
| 6348891 | Far field monitor apparatus In a far field monitor apparatus, each of first and second ILS localizers includes a receiving antenna, a plurality of couplers, a combiner, a receiver, and a first detector. The receiving antenna is formed from a plurality of antenna elements symmetrical... | 02/19/2002 |
| 6239745 | Satellite landing system having instrument landing system look alike guidance Disclosed are a global navigation satellite system (GNSS) landing system (GLS) and methods of using the same to calculate a vertical deviation from the glide slope of the aircraft. A GNSS antenna and position determining circuitry are used to determine th... | 05/29/2001 |
| 5909193 | Digitally programmable radio modules for navigation systems A programmable digital radio is configured to perform navigation functions. A receiver in the programmable digital radio receives analog signals from a navigation unit and digitizes the analog signals to produce digital navigation signals. The digital nav... | 06/01/1999 |
| 5532701 | Arrangement for comparing two temporally separated bursts of signal at two different frequencies A comparator circuit compares two temporally separated input bursts of signals which occur at two different frequencies. The first burst is an interrogation pulse and the second burst is a reply pulse in a DME system. The comparator circuit includes a fir... | 07/02/1996 |
| 5483245 | ILS signal analysis device and method The invention relates to an instrument landing system (ILS) signal analysis device including an analog/digital converter receiving the composite signal to be analyzed and delivering a succession of values which can be processed in digital form, the signal... | 01/09/1996 |
| 5475393 | Precision landing system An aircraft landing system employs an array of antennas aligned across the runway, and equipment on board the aircraft employs radio interferometry to measure path length differences between the aircraft and selected pairs of the antennas. The antennas ea... | 12/12/1995 |
| 5311194 | GPS precision approach and landing system for aircraft A GPS precision approach and landing system for aircraft employs a fixed ground facility and a single satellite navigation receiver on board the aircraft. The fixed ground facility includes a reference receiver that measures differential corrections to th... | 05/10/1994 |
| 5206654 | Passive aircraft monitoring system A passive aircraft monitoring system (20) receives signals transmitted by an instrument landing system (14, 16) and reflected from aircraft (18). The Doppler shift in the reflected signals is used to calculate the position or velocity of the aircraft. Usi... | 04/27/1993 |
| 5101207 | MLS-type landing system with centralized means of surveillance It describes a Microwave Landing System wherein. The means for surveillance of the transmissions from the various MLS stations are centralized in a single central station which then commands the various MLS stations. The connection between the central station ... | 03/31/1992 |
| 5097266 | MLS-type landing system with centralized microwave generation The system comprises a central station assuring the generation of the microwave signals which must be transmitted by the different stations of an MLS. The signals thus generated in a centralized way are distributed to the different stations via an optical... | 03/17/1992 |
| 5022751 | Portable localizer siting system A portable siting system particularly useful for siting a portable localizer for a collocated approach guidance system for aircraft utilizes a laser range finder in conjunction with a shaft encoder to determine the distance between the localizer and two a... | 06/11/1991 |
| 5017930 | Precision landing system A precision aircraft landing system comprising at least four receivers which are located at different predetermined positions. Each receiver includes a precision timer for measuring the timer interval between the receiver's detection of an interrogation s... | 05/21/1991 |
| 4990921 | Multi-mode microwave landing system A guidance system for landing an aircraft is described which uses a source of signals identifiable with the aircraft and a ground station which is linked to the aircraft. Specifically, the ground station includes a receiver which is connected to one or mo... | 02/05/1991 |
| 4940986 | Millimeter wave locating A system for landing aircraft during low visibility includes a number of millimeter wave sources in or near the runway light housings radiating millimeter wave beams along the runway. An airborne millimeter wave camera includes a millimeter wave lens that... | 07/10/1990 |
| 4929957 | Method and apparatus for detecting receiver compression in multiple lobe guidance systems A method and apparatus for detecting amplitude compression in a guidance system utilizes a transmitting system that transmits two pulses having a predetermined amplitude differential therebetween on each of a plurality of directional beams. The amplitudes... | 05/29/1990 |
| 4912479 | Microwave landing system There is disclosed a microwave landing system wherein there are provided at least two means which are spaced by a predetermined distance and from two of which beams radiate alternately to scan a predetermined region vertically and horizontally. In the mic... | 03/27/1990 |
| 4866450 | Advanced instrument landing system A system for landing an aircraft is described, using a ground installation and an airborne installation which are synchronized together using GPS system time. Specifically, the ground installation includes a ground transmitter which radiates the sequence ... | 09/12/1989 |
| 4757320 | Method and device for the radioelectric synchronization of slave stations by a master station, especially for a microwave landing control system A method for the radioelectric synchronization of slave stations by a master station, especially for a MLS type landing control system. The method consists in transmitting by the azimuth station a synchronization data coded in the form of a series of shor... | 07/12/1988 |
| 4677442 | Microwave landing system with &#b1;90 degree azimuth clearance guidance and 360 degree data coverage A microwave landing system incorporates a set of antennas for the sequential transmission of guidance signals through a sequence of directions to enable the reception and decoding of the signals by an airborne receiver. Circuitry is included for the retra... | 06/30/1987 |
| 4667196 | Active visual display system for remote three-axis flight path guidance of landing aircraft An active, electro-optical display system for use on fixed-wing, land-based airport runways, is disclosed for remotely guiding a pilot during visual approach and landing of an aircraft. Conventional Microwave Landing System (MLS) ground-transmitted data i... | 05/19/1987 |
| 4599621 | Two-frequency glide-path station for the standardized instrument-landing system ILS To monitor the course signals radiated by the two-frequency glide-path station with respect to course line and course width, and to monitor the clearance signal, the signals radiated by the antennas (A1, A2, A3) and a signal extracted directly from the tr... | 07/08/1986 |
| 4429312 | Independent landing monitoring system An independent landing monitoring system (ILM) for guiding airborne vehicles on final approach to a landing using a ground-based beacon which transmits a sequence of pulse signals including an omnidirectional signal coded to identify its location and used... | 01/31/1984 |
| 4210930 | Approach system with simulated display of runway lights and glide slope indicator An airborne image camera, its respective image scan plate and image Cathode Ray Tube (CRT) forms a display which simulates runway lights and Visual Approach Slope Indicator (VASI) for the pilot so that the display portrays what the pilot would see, were i... | 07/01/1980 |
| 4167739 | Instrument landing system glidepath antenna array and drive therefor An instrument landing system (ILS) glidepath antenna array and drive therefor which provides for lower susceptibility to above-ground interference and higher stability than the known M-array system. The antenna array also provides for a shorter image grou... | 09/11/1979 |
| 4164743 | Drive arrangement for an instrument landing system glidepath antenna A drive arrangement for an instrument landing system (ILS) glidepath antenna array, the drive system providing for a shorter image ground than is required by the known null reference, sideband reference or M-array systems. The drive system is applicable t... | 08/14/1979 |
| 4040005 | Composite situation analyzer and instrument flight system Flight path angle is displayed relative to the aircraft reference indicator in a unique display and aircraft control system particularly useful during approach operations. Flight path angle is computed as a function of vertical velocity of the aircraft an... | 08/02/1977 |
| 4021806 | Method and apparatus for guiding aircraft along curved path approach profiles A microwave landing system wherein a plurality of curved path approach prles are defined tangent to the localizer beam center line. The coordinates of a desired profile are transmitted to the aircraft which then is directed to fly along the curved path a... | 05/03/1977 |
| 3971025 | Airport ground surveiliance system with aircraft taxi control feature A system for detecting, monitoring the movements of, and controlling the travel of aircraft and other vehicles on an airport surface. A series of small low-powered radar transmit-receive devices, each having a limited range, is disposed essentially in a l... | 07/20/1976 |
| 3968495 | Instrument landing system An aircraft instrument landing system for use on an aircraft runway to guide approaching aircraft along a glide path comprising in combination first and second directional transmitters to be disposed on the left and right sides of a runway for transmittin... | 07/06/1976 |
| 3952308 | Perspective navigation system employing the inner comparisons of signal phases received on an aircraft by a plurality of sensors A perspective display of a runway is obtained on an aircraft by sequentially transmitting signals from selected marker positions about the runway. A plurality of sensors are positioned on the aircraft with a first sensor being compared to a reference freq... | 04/20/1976 |
| 3946385 | Interferometric navigation and guidance system This invention comprises an interferometric technique for the one-way transmission of bearing angle information to an unlimited number of mobile receivers. In accordance with the invention the angle related path length difference, between transmitters loc... | 03/23/1976 |
| 3938155 | High stability modulator for instrument landing systems In an instrument landing system for aircraft, the transmitter is required to produce an amplitude modulated signal comprising a carrier wave having sidebands containing the sum of a 90 Hz and a 150 Hz signal as modulation, and to also produce a double sid... | 02/10/1976 |
