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Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 8358240 | Generating a time deterministic, spectrally noncoherent signal According to one embodiment, a system for generating a signal includes a monocycle generator, one or more temporal modulators, and a pulse shaper. The monocycle generator generates monocycles that form a signal comprising pulses, where a pulse corresponds to one or ... | 01/22/2013 |
| 8134495 | Transmitter apparatus for transmitting RF pulse signal, transmitter/receiver apparatus incorporating the transmitter apparatus, and receiver apparatus for receiving RF pulse signal A transmitter apparatus generates a RF pulse signal having alternating high-amplitude pulse-on intervals and low-amplitude pulse-off intervals, and supplies the RF pulse signal as respective individual transmission signals of antenna elements of an array antenna, wi... | 03/13/2012 |
| 8115674 | Method of detecting target object and target object detection device This disclosure provides a target object detection device for detecting different areas by different pulse-shaped signals detecting an area from an antenna position to a given distance. The device includes a transmission module for transmitting different pulse-shape... | 02/14/2012 |
| 8111188 | Radar system To provide a smaller radar system having a simple structure with as small number of component parts as possible at a lower cost as compared to conventional ones. A radar system 1 including a 3 dB coupler 5 having four terminals, and a pulse generator | 02/07/2012 |
| 7498978 | Radio frequency and microwave signals A device for generating high powered Radio Frequency (RF) or microwave signals comprising a fast rise-time video pulse generator, a modulator to modify the generated UWB pulses by gyromagnetic action to transfer a portion of the UWB pulse energy from lower frequenci... | 03/03/2009 |
| 7450059 | Non-linear dispersive transmission line assembly A non-linear dispersive transmission line assembly for producing high power radio frequency electrical signals includes a transmission line (6, 7) having a plurality of series connected inductors (8) each incorporating saturable magnetic material to pr... | 11/11/2008 |
| 7369082 | Method and apparatus implementing a scan strategy for automatic high power tube recovery A method of reducing power to an electron emitting cathode comprises the steps of sensing a weather condition; calculating a condition number based upon the weather condition; comparing the condition number to a threshold; and reducing the power to the electron emit... | 05/06/2008 |
| 7365603 | FET amplifier, pulse modulation module, and radar device An FET amplifier includes an FET for amplifying a high-frequency signal to be input to the gate on the basis of a gate bias voltage from a gate bias control circuit. In the FET amplifier, a high-frequency signal input circuit and the output portion of an inverting a... | 04/29/2008 |
| 7366243 | Methods and apparatus for transmitting non-contiguous spread spectrum signals for communications and navigation A technique for transmitting a spread spectrum signal using plural non-contiguous frequency bands separated by segments of frequency spectrum excluded from use involves: generating a digital time-domain spread spectrum signal; converting the time-domain signal to a ... | 04/29/2008 |
| 7263333 | Wireless ultra wideband network having frequency bin transmission level setting and related methods A wireless ultra wideband (UWB) network may include a plurality of UWB wireless devices communicating over a plurality of UWB frequency bins extending over a UWB frequency range. At least one of the UWB wireless devices may be for determining an existing interferenc... | 08/28/2007 |
| 7239268 | Method and apparatus for minimizing the number of power amplifiers required under multiple transmission conditions The number of power amplifiers required to amplify a plurality of transmission signals is reduced by using non-linear transmission lines (NTL) circuits. In general, a “combining” NTL circuit is used to combine the plurality of transmission signals to form a soli... | 07/03/2007 |
| 7212154 | Apparatus for producing an amplified radio frequency pulse Apparatus for producing an amplified Radio Frequency pulse includes a controller for monitoring the output amplified pulse and determining therefrom a correction for a deviation in the characteristics. The correction is applied by a phase shifter or amplitude contro... | 05/01/2007 |
| 7199747 | Generating a fine time offset using a SiGe pulse generator A method and apparatus for generating short electronic pulses using a modified differential trigger that is partly an analogue sinusoidal voltage and partly a selectable, DC voltage. The differential trigger is applied to a differential base band pulse generator hav... | 04/03/2007 |
| 7196658 | Waveform generation method, waveform generation program, waveform generation circuit and radar device A conventional waveform generation circuit was required to increase a number of bits or a sampling rate for a D/A converter to enhance a precision of waveform shaping, and had a problem that a cost was increased. Therefore, as a method for enhancing the precision of... | 03/27/2007 |
| 7170444 | Non-linear dispersive pulse generator A non-linear dispersive pulse generator for producing pulsed radio frequency electrical signals includes a non-linear dispersive electrical circuit (1) incorporating at least one non-linear element (2) made of a material sensitive to low power signals ... | 01/30/2007 |
| 7167125 | Pulse radar arrangement A pulse radar system has a high-frequency source, which supplies a continuous high-frequency signal and is connected on the one side with a transmission-side pulse modulator and on the other side with two separately controllable pulse modulators in at least one rece... | 01/23/2007 |
| 7158077 | Radar device and method for suppressing interference with a radar device A radar device is described having an arrangement to generate a carrier signal having a carrier frequency fT, an arrangement to generate pulses having a pulse repetition rate fPW, an arrangement to split the carrier signal between a transmissio... | 01/02/2007 |
| 7151484 | Pulse compression processor A pulse compression processor 20 compressing a modulated pulse signal correlately received by a receiver, includes a coefficient calculator 30 calculating a set of filtering coefficients for converting sampled output signal values outside a vicinity of... | 12/19/2006 |
| 7151483 | System and method for concurrent operation of multiple radar or active sonar systems on a common frequency A system and corresponding method for the concurrent operation of multiple radar systems on a common frequency and in the same geographical area includes a waveform generator that specifies certain operating parameters for the transmitted radar pulses. In a first in... | 12/19/2006 |
| 7148841 | Radar device A radar device includes a code generator, a transmission section, a reception section, a delay section, a despreading process section, a correlation value detection section, a target detection section, an estimation section, an acquisition section, and a correction ... | 12/12/2006 |
| 7145349 | Method for increasing the interference resistance of a time frame reflectometer and a circuit device of implementing said method The invention relates to methods and a circuit for increasing the interference resistance of a time frame reflectometer, in particular with respect to high frequency irradiation. A transmitted pulse (XS) is generated at a pulse repeater frequency (fprf) and coupled ... | 12/05/2006 |
| 7138841 | Programmable phase shift and duty cycle correction circuit and method A phase shift and duty cycle correction circuit is disclosed herein as comprising a programmable digital to analog converter (DAC), a storage device (e.g., a capacitor), a charge sub-circuit and dump sub-circuit for charging and discharging the storage device, respe... | 11/21/2006 |
| 7106250 | Robust predictive deconvolution system and method A method for processing a received, modulated pulse (i.e. waveform) that requires predictive deconvolution to resolve a scatterer from noise and other scatterers includes receiving a return signal; obtaining L+(2M−1)(N−1) samples y of the return signal, where y(... | 09/12/2006 |
| 7099368 | Ultra-wideband communication through a wire medium Methods and apparatus for creating, transmitting and receiving ultra-wideband pulses through wire media are presented. One embodiment of the present invention transmits ultra-wideband pulses that occupy radio frequencies that are not used by other electromagnetic si... | 08/29/2006 |
| 7081850 | Coherent detection of ultra wideband waveforms A general purpose system and method for transmitting and coherently detecting UWB waveforms is predicated on the formation of conjugate pair of UWB waveforms. The in-phase and conjugate quadrature waveforms are orthogonal to each other and have the same power spectr... | 07/25/2006 |
| 7081848 | Orthogonal pulse range ambiguity resolution A method for active ranging, such as radar, which sequentially transmits pulses of mutually different waveforms. Receive processing is performed concurrently for all the transmitted waveforms during each interpulse interval, to thereby provide range ambiguity resolu... | 07/25/2006 |
| 7064705 | Method of and apparatus for increasing the peak output pulse power delivered by capacitor-driven high-power diode and square-loop saturable reactor pulse compression generators with the aid of minority carrier sweep-out circuits within the pulse compression circuit A technique and apparatus for increasing the peak output pulse power of a capacitor driven high-power diode and square-loop saturable reactor pulse compression generator or transmitter (such as a Loran-C transmitter or other high power pulse generator) with the aid ... | 06/20/2006 |
| 7050000 | Radar based application programmable waveform generator component An exemplary radar system includes a waveform generator that generates a control waveform. An in-phase and quadrature modulator receives the control waveform from the waveform generator and in turn generates a waveform output that is amplified by a power amplifier b... | 05/23/2006 |
| 7049997 | Simultaneous dual polarization radar system A simultaneous dual polarization radar system is disclosed that utilizes a RF power divider to replace the high speed dual polarization switches utilized in current dual polarization radar systems. The disclosed systems allow for transmission and reception in both h... | 05/23/2006 |
| 7042293 | DC/DC converter using bipolar transistor, method of manufacturing the same and DC power supply module using the same A DC/DC converter is comprised of a bipolar transistor, an inductor, a smoothing capacitor, an input terminal, an output terminal, and a grounded terminal. A base of the transistor includes a silicon germanium layer. The bipolar transistor has a high switching speed... | 05/09/2006 |
| 7002511 | Millimeter wave pulsed radar system A millimeter wave pulsed radar system includes a radar synthesizer having a voltage controlled oscillator/phase locked loop (VCO/PLL) circuit, direct digital synthesizer (DDS) circuit and quadrature modulator circuit that are operative to generate an intermediate fr... | 02/21/2006 |
| 6999445 | Multiple access communication system using chaotic signals and method for generating and extracting chaotic signals A multiple access telecommunication system is provided, which makes use of chaotic signals. Each transmitter has a chaotic system, which has at least one strange attractor in its phase space, and each receiver has chaotic systems, which corresponds to those in the t... | 02/14/2006 |
| 6989782 | Ultra-wideband radar system using sub-band coded pulses Methods and apparatus are provided for radar systems using multiple pulses that are shorter than the expected range delay extent of the target to be imaged. In one implementation, a method for performing radar includes the steps of: transmitting a plurality of pulse... | 01/24/2006 |
| 6975665 | Low power, high resolution timing generator for ultra-wide bandwidth communication systems An ultra wide bandwidth communications system, method and computer program product including an ultra wide bandwidth timing generator. The timing generator includes a high frequency clock generation circuit having low phase noise; a low frequency control generation ... | 12/13/2005 |
| 6972709 | Radio frequency transceiver A transceiver that includes a radio frequency source comprised of a monolithic millimeter wave integrated circuit. The transceiver generates a signal of a first frequency, which is then converted to a signal of a second frequency as the signal is conveyed through th... | 12/06/2005 |
| 6965341 | High resolution SAR processing using stepped-frequency chirp waveform A stepped-frequency chirped waveform improves SAR groundmapping for the following reasons. Range resolution in SAR image is inversely proportional to the transmitted signal bandwidth in nominal SAR systems. Since there is a limit in the transmitted bandwidth that ca... | 11/15/2005 |
| 6956896 | High accuracy receiver forward and reflected path test injection circuit There is disclosed an injection circuit for measuring radio frequency (RF) signals in an RF receiver for use in measuring the impedance match of a receive antenna and for use in calibrating receiver gain, wherein an advantageous embodiment of the injection circuit c... | 10/18/2005 |
| 6950485 | Precision timing generator apparatus and associated methods A precision timing generator includes a combiner that provides a timing signal by combining a coarse timing signal and a fine timing signal derived from a phase-shifted sinusoidal signal that has a desired phase shift. The coarse timing generator generates the coars... | 09/27/2005 |
| 6943640 | Current source modulator A current source modulator (202; 302, 502) provides power to radar transmitters. The modulator comprises a power supply (210, 310, 510) providing, when enabled, a known current to a storage capacitor (145). A comparator circuit (220) prov... | 09/13/2005 |
| 6940450 | Robust predictive deconvolution system and method A method for processing a received, modulated pulse (i.e. waveform) that requires predictive deconvolution to resolve a scatterer from noise and other scatterers includes receiving a return signal; obtaining L+(2M−1)(N−1) samples y of the return signal, where y(... | 09/06/2005 |
