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...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.
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| Number | Title | Issue Date |
| 8134494 | Simulating the mutual performance of an antenna array coupled to an electrical drive circuit According to one embodiment, simulating the mutual performance of an antenna array coupled to an electrical drive circuit includes receiving one or more cross-coupling matrices and a number of electrical circuit parameters. Each cross-coupling matrix comprises matri... | 03/13/2012 |
| 7372398 | Electronic target position control at millimeter wave for hardware-in-the-loop applications An apparatus for use in controlling a simulated target position in a millimeter wave, hardware-in-the-loop system includes a pair of horns and a conditioning circuit. The conditioning circuit is capable of generating a pair of output millimeter wave signals, each to... | 05/13/2008 |
| 7323884 | RF test chamber A system for testing radio frequency (RF) communications of a device capable of such communications is provided. The system includes a chamber for isolating the device from RF interference, an antenna that is suitable for RF communications with the device wherein th... | 01/29/2008 |
| 7292182 | Method of calibrating a microwave source The present invention relates to a method for calibrating the phase of a microwave source, in which: a calibration circuit is closed, the calibration circuit comprising an injection channel connected to a measurement channel via the source to be calibrated; a test s... | 11/06/2007 |
| 7242346 | Pulse descriptor word generator A portable apparatus and a method for inserting digitized previously recorded or fabricated radio frequency (RF) pulse descriptor word (PDW) data files into an electronic surveillance (ES) system to realistically simulate a complex RF environment. The apparatus incl... | 07/10/2007 |
| 7154435 | Sparse numerical array feed for compact antenna and RCS ranges Systems and methods enable numerically creating a flat field in a compact radar range with a curved reflector, and without use of a separate phased array of elements, at frequencies lower than those that are possible with currently known, reflector-only compact rada... | 12/26/2006 |
| 7145504 | Arbitrary radar target synthesizer (arts) A system for generating a simulated radar return signal. The novel system includes a processor adapted to receive target and waveform parameters and in accordance therewith generate a composite digital signal, and a digital to analog converter adapted to convert the... | 12/05/2006 |
| 7129839 | Device for monitoring an area The present invention relates to a monitoring device (1) with a transmitter unit (2) and a receiver unit (3) for monitoring an area. Slotted cables serve as antennas. According to the invention, a first slotted cable is arranged as a transmittin... | 10/31/2006 |
| 6968014 | Missing cycle based carrier modulation A sinusoidal R.F. carrier is modulated for the transmission of digital binary datastreams through the deletion of carrier wavelets. These wavelets are defined between zero crossover positions representing zero energy locations. One or more wavelets are switched out ... | 11/22/2005 |
| 6950057 | Complex radar target simulator A complex radar target emitter having independent control of three radio frequency (RF) radiation field characteristics, the radiation field characteristics being the real and imaginary components of the complex amplitude of the radiation field, the spatial derivati... | 09/27/2005 |
| 6933883 | Method and device for aligning radar mount direction, and radar aligned by the method or device A radar mount direction alignment device to be used for aligning the transmit/receive direction of a radar device 2D mounted on a member on which a radar device is to be mounted, such as a vehicle 1. The radar mount direction alignment device has recei... | 08/23/2005 |
| 6927725 | System and method for radar detection and calibration A system and method for radar detection and calibration. By measuring the true range of a calibration target on entry to the radar's detection zone, the actual detection capability of the radar in current atmospheric conditions with the actual radar can be determine... | 08/09/2005 |
| 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 driver coupled to the antenna/calibration switch controls the operatio... | 12/28/2004 |
| 6806837 | Deep depression angle calibration of airborne direction finding arrays A system for calibrating airborne direction finding antenna arrays eliminates the problem of trying to maintain a constant depression angle when flying an airplane directly over a calibration antenna to collect deep depression angle data. The deep depression angle d... | 10/19/2004 |
| 6803877 | Device for generating a transit time delay of a pulsed radar signal and method for operation thereof A device for generating a desired transit time delay of a pulsed radar signal is characterized in that a delay line (13) with signal input and signal output for the pulsed radar signal is provided whose transit causes time delay τ of the pulsed radar signal,... | 10/12/2004 |
| 6753806 | Methods and apparatus to compensate for zero Doppler returns A method for simulating a Doppler signal under stationary conditions is described. The method includes sampling a radar return signal at an integer multiple of the return signal frequency plus a fraction of the return signal period and generating a base band signal ... | 06/22/2004 |
| 6748351 | Modular covert remote electronic warfare simulator An apparatus for electronic warfare signal simulation which is used in an external test system to simultaneously test a plurality of “victim” communication systems for vulnerability to jamming. The test system includes a remote radiator of a signal free of jammi... | 06/08/2004 |
| 6559791 | Dual port memory arbitrary waveform generator A dual port memory waveform generator system uses a clock-based system whose pulse durations and separations were set by counters that use the same fundamental clock frequency of the radar to be simulated. This pulse generator is loaded from a laptop comp... | 05/06/2003 |
| 6496770 | Method and apparatus for controlling the travel speed of a vehicle The method of controlling travel speed of a vehicle includes controlling vehicle travel speed according to a set vehicle speed given by a driver of the controlled vehicle in a speed control mode; detecting at least one object present in front of the contr... | 12/17/2002 |
| 6421004 | Mitigation of antenna test range impairments caused by presence of undesirable emitters An antenna test range uses direct spread-spectrum based test signals to test the performance of an antenna. Since a spread spectrum waveform has high autocorrelation properties with itself and high cross-correlation properties with signals other than itse... | 07/16/2002 |
| 6392586 | Car radar testing A method and device for testing the function of a radar. A diode (21) with variable radar radiation impedance is arranged in the beam path (23) inside the antenna unit (4, 6) of the car radar and is fed with alternating current for simulating a radar targ... | 05/21/2002 |
| 6384772 | Wideband phase locking of low offset frequency sources A linear phase detector circuit enables locking of two frequency sources which can operate in the range of 10 GHz with a minimal frequency offset, such as from 0 Hz to 50 KHz. With the frequency sources operating at frequencies F1 and F2 with an offset F2... | 05/07/2002 |
| 6384771 | Automated target generator range and doppler calculator An automated simulator for radar and sonar applications. The inventive simulator is implemented in hardware and generates current parameters with respect to a simulated target in response to a plurality of initial values with respect thereto. In the illus... | 05/07/2002 |
| 6346909 | System for generating simulated radar targets A system is disclosed for generating simulated radar targets that eliminates the necessity for large outdoor test ranges and is relatively low in cost. The simulated radar target generating system provides complex targets of given simulated dimensions at ... | 02/12/2002 |
| 6236362 | Mitigation of antenna test range impairments caused by presence of undesirable emitters An antenna test range uses direct spread-spectrum based test signals to test the performance of an antenna. Since a spread spectrum waveform has high autocorrelation properties with itself and high cross-correlation properties with signals other than itse... | 05/22/2001 |
| 6150976 | Synthesis of overlapping chirp waveforms A digital radar landmass simulator (DRLMS) used for stimulation testing pulse radars, wherein the DRLMS operates by synthesizing time-overlapping chirp waveforms using finite impulse response filters. The DRLMS, thus, effectively generates many overlappin... | 11/21/2000 |
| 6107958 | Method and apparatus for testing an antenna control system A method and apparatus for testing an antenna control system. The antenna control system having an antenna control unit electrically coupled to an antenna pedestal. The present invention simulates the operational environment of the antenna control system ... | 08/22/2000 |
| 6037897 | Apparatus and methods for moving target indicator simulation A moving target simulator system for pulse Doppler radar includes a processor for processing received radar signal and transforming the signal into patterned pulses before subjecting the patterned pulses to an 180 degree phase-shift by a phase-shifter. Th... | 03/14/2000 |
| 5892479 | Electromagnetic target generator The electromagnetic target generator of this invention is used to simulate radar target for the purpose of testing and experimenting on a variety of weapon systems radars. The weapon system radar being tested emits a radar signal which is received by the ... | 04/06/1999 |
| 5886626 | System and method for performing jamming testing on communication networks A system is tested for jamming resistance by supplying a simulated jamming ignal. The simulated jamming signal is produced by calculating a propagation path loss in the terrain between the system under test and a location where the jammer would be, predict... | 03/23/1999 |
| 5786786 | Photonic radar decoy A photonic radar decoy (50) is provided which simulates an aircraft to a radar having an interrogating signal. A plurality of receiving antenna (52, 54, 56, 58, 60) are attached to the decoy (50) with each of the receiving antenna (52, 54, 56, 58, 60) ind... | 07/28/1998 |
| 5721554 | Near field planar wave generation for electronic range testing A near field planar wavefront generation method that uses a relatively small number (three to five) of transmitting antennas disposed a predetermined distance from an antenna array having a multi-wavelength aperture that is part of a system under test. Th... | 02/24/1998 |
| 5689192 | Method for simulating a controlled voltage for testing circuits for electromagnetic susceptibility Apparatus and method for low cost monitoring the level of signal at a test point in a system for susceptibility to electromagnetic fields. A probe, including a detector diode, and a non-metallic, electrically overdamped conductor, which is transparent to ... | 11/18/1997 |
| 5592131 | System and method for modulating a carrier frequency A carrier frequency modulating system and method for producing a modulated carrier frequency is disclosed. The system comprises a carrier frequency signal generator for producing a carrier frequency signal at a carrier frequency at an output thereof. The ... | 01/07/1997 |
| 5457463 | Radar return signal simulator An apparatus for generating one or more radar return signals representative of one or more remote objects useable in ground based, shipboard and airborne radar systems for testing the radar and its user. The apparatus may generate one or more return signa... | 10/10/1995 |
| 5432516 | Radar obstacle detection system with self test A radar system which detects the presence of objects in the proximity of a movable vehicle includes a signal source which generates object detection signals, a first antenna which transmits the object detection signals and receives the object detection si... | 07/11/1995 |
| 5421728 | In-flight radar warning receiver training system An in-flight radar warning receiver training system for use with a radar warning receiver (RWR) includes a real on/off switch for switching real threat track file data to a formatter. A generator produces threat/RWR simulated threat track file data. A mer... | 06/06/1995 |
| 5351054 | Radar target with delayed reply means An apparatus for producing an electromagnetic signal which simulates the radar signature of a vertical takeoff and landing vehicle is disclosed. The apparatus contains a means for receiving a radar signal, modulation means for modifying the radar signal, ... | 09/27/1994 |
| 5341146 | Covert remote electronic warfare simulator A covert remote electronic warfare simulator is disclosed which includes eiving and signal processing apparatus for incorporating various electronic signal parameters and variables representing propagation effects from the environment borne by a low powe... | 08/23/1994 |
| 5302960 | Multi-element susceptibility room An apparatus is disclosed for testing the immunity of an electronic device to interfering electromagnetic radiation. The apparatus includes a room enclosing a bounded space for containing the electronic device to be tested and a plurality of radiating ele... | 04/12/1994 |
