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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 |
| 7969350 | Method and system for reducing a leakage component of a received radar signal Methods and systems for reducing a leakage component of a received-signal are disclosed. A transmit antenna of a radar system transmits a transmit-signal including a transmit component. A receive antenna of the radar system receives a received-signal including a lea... | 06/28/2011 |
| 7773033 | Multilayer metamaterial isolator A multilayer metamaterial isolator and method of fabricating the same. A first layer or surface of a multilayer dielectric substrate includes a first leg of a first resonator loop. A second layer or surface of the multilayer dielectric substrate includes a second le... | 08/10/2010 |
| 7633435 | Duplexer for simultaneous transmit and receive radar systems An enhanced duplexer (1) which includes a combination of high dynamic range (HDR) amplifiers (11, 17) and a naovel signal cancellation circuit topology (15). Return signals from the circulator (3) are fed into the first HDR amplifier (... | 12/15/2009 |
| 7439901 | Active phased array antenna for aircraft surveillance systems An active antenna is provided that includes an antenna element for transmitting RF transmit signals at a predetermined effective radiated power (ERP). An antenna module is configured to be mounted to an aircraft, with the antenna element being mounted to the antenna... | 10/21/2008 |
| 7436353 | Transmitting-receiving module of radar system A transmitting-receiving module of a radar system which is an embodiment of the present invention, includes, a transmitting circuit for sending transmitting RF signal, a three terminal circulator having three terminals and with the first terminal of which is connect... | 10/14/2008 |
| 7427949 | System and method of using absorber-walls for mutual coupling reduction between microstrip antennas or brick wall antennas A multi-element antenna with sufficiently small return loss and mutual coupling signals to allow the simultaneous transmission of powerful radar signals and the reception of faint target return signals. The microstrip patch antenna has radio frequency absorbing mate... | 09/23/2008 |
| 7388537 | Radar detector with reduced emissions A radar detector includes features to reduce emissions such as those typically generated by the detector's local oscillator. Two low noise amplifiers (LNA's), operating in X band and a combined K/Ka band, respectively amplify X and K/Ka band signals from separate an... | 06/17/2008 |
| 7295152 | Timing adjustment method for radar, and radar apparatus having automatic timing adjusting function On/off timing of an amplifier and timing of antenna selection are accurately adjusted. When adjusting the on/off timing of the amplifier, modulation of a transmit signal is stopped, and a switch is set so as not to select any one of the antennas, thereby totally ref... | 11/13/2007 |
| 7256977 | Device for protection from thunder This invention aims at preventing a thunderbolt attack detecting circuit from determining that no thunderbolt is approaching because the thunderbolt attack detecting circuit turns to its initial condition due to power interruption caused by an approaching thunderbol... | 08/14/2007 |
| 7233278 | Radar level gauge with switch for selecting transmitter or receiver mode A radar level gauge (RLG), intended for measuring with a close-range low-power radar a distance to a content surface in a container relatively to a measuring position, which is located above the surface and fixed in relation to a lower boundary of said container. Th... | 06/19/2007 |
| 7221311 | Radar A radar includes a transmitter circuit, a receiver circuit, an antenna and a circulator. The receiver circuit includes a low-noise amplifier which amplifies a received signal fed from the antenna through the circulator. A local oscillator provided in the receiver ci... | 05/22/2007 |
| 7202812 | Technique for compensation of transmit leakage in radar receiver A radar system (500) radiates a radar transmit signal, has a radar signal receiver (503) and a canceller (505) for canceling leakage of the transmit signal into the radar signal receiver (503). The canceller (505) comprises a digit... | 04/10/2007 |
| 7183843 | Electronically tuned power amplifier A power amplifier apparatus that includes a main power amplifier circuit and an injection power amplifier circuit is provided. The main amplifier includes a pair of quadrature coupled amplifiers. Similarly, the injection power amplifier also includes pair of quadrat... | 02/27/2007 |
| 7161530 | System and method for radar calibration using antenna leakage The system and method for radar calibration using antenna leakage is a simplified means of calibrating the channels in amplitude and phase using natural signal leakage between antennas. It utilizes as calibration signal a wideband sinusoidal Frequency Modulated Cont... | 01/09/2007 |
| 7158074 | Radar system and car radar system To provide a radar system for controlling a gate power supply and drain power supply of a MMIC (microwave monolithic IC), protecting the MMIC at the time of start and shut-off, and simultaneously avoiding an occurrence of a failure in the MMIC due to a residual char... | 01/02/2007 |
| 7148840 | Radar apparatus, radar apparatus controlling method A radar apparatus comprises: a transmitter unit having a high-frequency oscillating unit whose oscillation frequency is variable, and a pulse amplitude modulating unit for amplitude-modulating a pulse of a transmission high-frequency signal output from the high-freq... | 12/12/2006 |
| 7119735 | Vehicle-installed radar sensor system and vehicle-installed radar sensor A vehicle-installed radar sensor system includes a transmission section, a reception section, and a shield member. The transmission section is disposed in a closed space formed between a permeable member provided in a vehicle and a vehicle body, and transmits a rada... | 10/10/2006 |
| 7096132 | Procedure for estimating a parameter of a local maxima or minima of a function A method of and system for estimating a parameter of a local maxima or minima of a function. An interpolated local maxima or minima is determined. An interpolation offset is then derived, comprising a deviation between locations of the interpolated and sampled local... | 08/22/2006 |
| 7076218 | Control method and circuit for using a heterojunction bipolar transistor power amplifier in a zero intermediate frequency architecture transmitter A method of controlling the power delivered by a heterojunction bipolar transistor power amplifier receiving an input power and delivering an amplified output power in a zero intermediate frequency architecture includes a step of detecting the output power and varyi... | 07/11/2006 |
| 7075478 | Radar altimeter having an automatically calibrated sensitivity range control function A radar altimeter for an air vehicle is described. The radar altimeter includes a transmit antenna configured to transmit radar signals toward the ground, a receive antenna configured to receive radar signals reflected from the ground, the receive antenna also recei... | 07/11/2006 |
| 7049999 | Modulation circuit for a vehicular traffic surveillance Doppler radar system A modulation circuit for a traffic surveillance Doppler radar system is disclosed. In one embodiment, the modulation circuit is utilized in a vehicular traffic surveillance Doppler radar system that processes a reflected double-modulated FM signal to determine a tar... | 05/23/2006 |
| 7006033 | Pulse radar apparatus An embodiment comprises a unit generating a control pulse signal by delaying a basic signal in generating a transmission pulse, and a unit performing a gate operation on a received signal using the control pulse signal. Another embodiment comprises a unit generating... | 02/28/2006 |
| 6980410 | Active lightning protection system and method An active lightning protection system and method is disclosed. According to one embodiment of the invention, the active lightning protection system includes a charge sensor that senses the build-up of charge associated with an imminent lightning strike in the proxim... | 12/27/2005 |
| 6975265 | Method and device for self-calibration of a radar sensor arrangement A method and an apparatus for operating a radar sensor system with a number of adjacent individual sensors (3, 4, 5, 6), extensively synchronized with one another, for determining the position of a target object (15) are proposed. In one measurement cy... | 12/13/2005 |
| 6972711 | Transmit-receive FM-CW radar apparatus Disclosed is a transmit-receive FM-CW radar apparatus which switches between transmission and reception by time division control, wherein amplifiers capable of controlling gain are provided in a transmitter signal path and a receiver signal path, respectively, and w... | 12/06/2005 |
| 6937184 | Millimeter wave radar A millimeter wave radar for the purpose of automatic operation or collision prevention of a vehicle which solves the problem that a side lobe of a transmitted electromagnetic wave is reflected by surrounding bodies and the reflected wave is received, with the result... | 08/30/2005 |
| 6801157 | Guided wave radar level transmitter A guided wave radar measurement instrument comprises a probe defining a guided wave radar transmission line. A pulse circuit is connected to the probe for generating a very fast stream of pulses on the transmission line and receiving reflected pulses returned on the... | 10/05/2004 |
| 6750808 | Process instrument with split intrinsic safety barrier A process instrument comprises a housing, a terminal in the housing for connection to a two-wire process loop and an active element for sensing a characteristic of a process. A control circuit is disposed between the terminal and the active element for measuring the... | 06/15/2004 |
| 6720912 | Single-antenna time division control type FM-CW radar In a single-antenna time division control type FM-CW radar, an amplifier is provided in each signal path in a transmitting system and a receiving system, and the amplifier provided in the transmitting system and the amplifier provided in the receiving system are ope... | 04/13/2004 |
| 6686876 | Photon primed non-radioactive gas plasma receiver protector A gas plasma type receiver protector for a radar system includes a priming device in the form of a miniature high intensity blue light emitting diode (LED) ranging in wavelength from 470 nm to 490 nm, an ultra-violet LED, miniature lamp or laser diode ran... | 02/03/2004 |
| 6680692 | Continuous-wave radar with reflection-modulator A continuous wave radar system includes a transmitter circuit for generating radar transmitting signals, a transmit/receive antenna, coupled to the transmitter circuit by way of a circulator, and a receiver circuit, which is coupled to the transmit/receiv... | 01/20/2004 |
| 6677891 | Method and device for transmitting and receiving electromagnetic waves The invention relates to a filling level measuring device based on the principle of transit time measurement. An inventive filling level measuring device comprises an electronic unit (4) including a transmitting (9) and receiving means (10) for electromag... | 01/13/2004 |
| 6489927 | System and technique for mounting a radar system on a vehicle A system and technique for mounting a radar to a vehicle provides a mounting that does not interfere with the aesthetic appearance of a vehicle, that does not interfere with the aerodynamic performance of the vehicle, and offers optimal radar transmission... | 12/03/2002 |
| 6456224 | Edge concealment system for abating radar detectability of aircraft An edge concealment system for abating electrical discontinuities between externally exposed edges of adjacent surface pieces separated by a gap. The system includes a cover component shrouding each edge and able to absorb or conduct incident radar energy... | 09/24/2002 |
| 6411250 | Electromagnetic sensor system A vehicle (160) such as a motor road vehicle is fitted with an electromagnetic sensor system comprising transmitting means (e.g. 4, 1) for transmitting a radio frequency signal, receiving means (e.g. 2, 6) for receiving reflections of said signal from rem... | 06/25/2002 |
| 6384765 | Repeater jamming transmitter and casing for the same This invention concerns a repeater jamming transmitter (2), and a casing arrangement with repeater jamming transmitter. The repeater jamming transmitter (2) comprises transmitter antenna (7), receiver antenna (8) and electronics part (10) with amplifier a... | 05/07/2002 |
| 6320532 | Low power radar level transmitter having reduced ground loop errors A low power radar level transmitter having reduced ground loop errors and a related method are disclosed. A microwave termination is couplable to a reference voltage such as earth ground and is coupled to a microwave transceiver through at least one low f... | 11/20/2001 |
| 6154167 | Excitation method and ultra-wide bandwidth antenna for ground penetrating radar systems A novel method of creating and detecting ultra wide bandwidth signals in a ground penetrating radar context.... | 11/28/2000 |
| 6091360 | Antenna system The invention relates to a multi-face phased array antenna. To prevent crosstalk between the individual faces, each face comprises two cancellers, each of which cancels the crosstalk from an adjacent face. To this end, each canceller receives a reference ... | 07/18/2000 |
| 5955984 | System and method for simultaneous data link with multipurpose radar operations A technique for operating a communication link in RF proximity to an operational radar. A data link waveform is employed which allows a data link receiver to detect an alert indication during normal radar operation. When the alert is detected, the system ... | 09/21/1999 |
