Did You Know...
...that the Band-Aid Bandage was invented by a Johnson & Johnson employee whose wife had cut herself? Earl Dickson's wife was rather accident prone, so he set out to develop a bandage that she could apply without help. He placed a small piece of gauze in the center of a small piece of surgical tape, and what we know today as the Band Aid bandage was born!
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| Number | Title | Issue Date |
| 5497160 | Method and apparatus for improved auto-correlation and range correlation in pseudo-random noise coded systems A method and apparatus is disclosed for improved out-of-range rejection in pseudo-random noise (PN) coded systems by adjusting the relative phase difference between the two phase states of a bi-phase modulation. The energy in the spectral lines of the bi-... | 03/05/1996 |
| 5469174 | Pulse transmitter for terminating reflected waves A pulse transmitter for terminating reflected waves is disclosed which utilizes a series switched charged line pulse generator with a shunt element that is switched into the circuit immediately after the pulse is launched into an output line. The shunt el... | 11/21/1995 |
| 5440311 | Complementary-sequence pulse radar with matched filtering and Doppler tolerant sidelobe suppression preceding Doppler filtering A radar transmits dispersed pulses in which the subpulses are modulated by first and second mutually complementary code sequences, the autocorrelation functions of which are selected so that, in the sum of their autocorrelation functions, the main range l... | 08/08/1995 |
| 5422646 | High frequency MTI radar An MTI radar based on a comparison of the Doppler shifts of the original signal and a phase-reversed signal using pulse compression wherein the received signal is phase detected for in-phase and quadrature components relative to the IF. A Doppler-correcte... | 06/06/1995 |
| 5376939 | Dual-frequency, complementary-sequence pulse radar A radar system simultaneously transmits first and second signals toward a target at higher and lower carrier frequencies, respectively. Each carrier is phase-modulated by a set of pulses. The first set of pulses is dispersed in time, and the second set of... | 12/27/1994 |
| 5278567 | Post detection integration method and apparatus for pulse compression radar utilizing surface acoustic wave (SAW) matched filters Received expanded radar pulses pass through a surface acoustic wave (SAW) weighted filter (64) for sidelobe suppression, and then into a SAW tapped delay line (66). The pulses appear at the taps (66a,66b,66c) of the delay line (66) coarsely aligned in tim... | 01/11/1994 |
| 5157403 | Noise correction in radars for diffuse targets A ranging system such as a radar system transmits signal pulses toward a diffuse target, such as an atmospheric disturbance. The echoes are processed by quantizing and by doppler filtering to produce a plurality of frequency components representing the ra... | 10/20/1992 |
| 5101210 | Signal dynamic range compression apparatus and method including clutter estimation and reduction The maximum amplitude of an input signal (IN) is compressed or reduced to a smaller value suitable for operation on the compressed signal (OUT) by a downstream signal processing stage (16) having insufficient dynamic range, ratio of maximum amplitude to r... | 03/31/1992 |
| 5079556 | Coherent pulse radar system A coherent pulse radar system capable of eliminating a signal associated with a multiple time around path or capable of removing range ambiguity of this multiple time around signal. The radar system includes a device for changing phases of transmitted pul... | 01/07/1992 |
| 5012253 | Radar receiver A radar receiver and, more particularly, a radar receiver of the type which is utilized in connection with a frequency-modulated, continuous-signal radar apparatus. The radar receiver, in the receiving channel thereof, is provided with a high-pass filter ... | 04/30/1991 |
| 4965584 | Method and devices for translation along the axis of frequencies of the modulus of the transfer function of a filter The invention relates to a method for frequency-shifting the modulus of the transfer function of a transversal filter. In a transversal filter having three delay lines Z1, Z2 and Z3 in series and four multipliers M'0 to M'3, the multiplier coefficients K0 to K... | 10/23/1990 |
| 4891649 | Noise suppressor for pulsed signal receivers A pulsed radar system has improved signal to noise characteristics obtained by suppressing phase noise. Means are provided to store a copy of the transmitted RF signal pulse, which copy contains any phase noise of the RF carrier that is transmitted. The s... | 01/02/1990 |
| 4804962 | Clutter elimination radar A radar receiver having a clutter-elimination filter in the receiver's intermediate frequency stage. The filter is centered on the intermediate frequency fi and has a transfer function in which a band-pass characteristic is superimposed on a ba... | 02/14/1989 |
| 4786909 | Receiving circuit In a receiving circuit a control circuit and a direction finding circuit generate a digitally encoded "descriptor" which characterizes pulses of r.f. radiation received in a particular azimuthal direction and having a particular carrier frequency. The "de... | 11/22/1988 |
| 4737899 | Electric power supply device for radar A very high voltage stabilized power supply device for a pulse radar system, in particular an airborn radar, which comprises a primary winding connected in a series with an electronic power commutation switch actuated at the recurrence frequency of the pu... | 04/12/1988 |
| 4727375 | Process for adapting the post integration in a switched pulse repetition frequency radar and a circuit implementing this process The invention relates to a process for adapting the post integration in a switched pulse repetition frequency radar and a circuit implementing this process. For that, the post integration of the detected signals is effected as a function of the signal rec... | 02/23/1988 |
| 4709237 | Device for eliminating low frequency noise from a transmission system, in particular 1/f noise in a homodyne radar receiver Device for eliminating the noise in 1/f from a Doppler radar comprising in the HF emitting system, a phase coder introducing, at frequency PRF/2 a phase shift of 0 and π alternately, and in the receiving system, after the receiver, a decoder, or gain inv... | 11/24/1987 |
| 4591856 | Hand off integrator apparatus for signal detection A hand off integrator apparatus utilizing first and second recirculating integrator units in series to integrate a series of input pulses in order to detect the presence of weak signals in a high background noise environment.... | 05/27/1986 |
| 4578676 | Delay lattice filter for radar doppler processing An adaptive filter for enhancing the discrimination of targets from clutter and noise and suitable for use in a pulse doppler radar signal processor which processes successive echo pulse period signalling in accordance with range cell samples is disclosed... | 03/25/1986 |
| 4528565 | Pulse doppler radar receiver with a circuit for reducing spurious signals A pulse Doppler radar receiver which continuously monitors successively obtained amplitude values Ao through An with the disrupted amplitude values which deviate by a prescribed value from an interpolation value obtained from adjacent undisturbed amplitud... | 07/09/1985 |
| 4439765 | Radar video processor Apparatus for processing radar video signals and applying the processed signals to a radar display. The apparatus includes video extraction circuitry which removes random pulse interference and noise from the video signals. The improvement of the present ... | 03/27/1984 |
| 4364048 | Interleaved sweep radar display for improved target detection A system, which interfaces with a radar indicator, for improving signal-toise ratio (SNR) and enhancing the detection of moving targets includes an analog-to-digital (A/D) converter, an integrator, a digital memory, a digital-to-analog (D/A) converter, a... | 12/14/1982 |
| 4219818 | Radar system 1. A radar system comprising means for radiating pulse-modulated electromagnetic energy, means for receiving said energy after reflection from a target, means for generating pulses, said generated pulses being applied to said radiating means for control o... | 08/26/1980 |
| 4123755 | Radar interference reduction Interference between radar systems is eliminated by using shaped pulses. In one embodiment, the pulse has a cosine shape, in another a cos2 shape and in a third embodiment a cosn shape. In yet another embodiment, a single sideband sh... | 10/31/1978 |
| 4119963 | Coherent side-lobe suppressing unit for a pulse radar apparatus In a pulse radar apparatus the receiver is provided with a coherent side-lobe suppressing unit comprising: A. a first and a second transmission channel respectively for directional and omnidirectional reception of r.f. signals, each of said channels havin... | 10/10/1978 |
| 4117483 | Noise-immune signal processing circuit for pulsed radars In a pulsed radar utilizing the phase shift of the intermediate frequency signal of a return echo with the speed of a moving object relative to a given point, a signal processing circuit includes a pair of comparators which respond to the intermediate fre... | 09/26/1978 |
| 4115774 | CW radar AM-noise video-cancellation system AM noise produced by a CW or FM-CW radar transmitter can be cancelled from the radar receiver output by use of a servo system working at video frequencies. A fixed pair of AM sidebands is deliberately added to the source, using a known discrete modulating... | 09/19/1978 |
| 4097863 | Marine radar system with independent switched power supplies A marine radar system having a constant brightness display presentation upon all range settings and with independent switched power supplies for both the MTR and indicator units. The switching frequencies of the power supplies are independent from each ot... | 06/27/1978 |
| 4083007 | Radar transmitter temporal noise reduction system A pulsed radio-frequency transmitter-modulator system including circuits for converting a sample of the transmitter-radio frequency pulse to a corresponding video pulse and comparing this to the standardized timing pulse of the system to develop a control... | 04/04/1978 |
| 4008469 | Signal processing in short-pulse geophysical radar system Signal processing techniques and apparatus for use in short-pulse geophysical radar systems to improve signal-to-noise ratio, reduce r.f. interference, improve resolution and reduce ambiguities.... | 02/15/1977 |
| 4005422 | Radar with sampling gate circuit for video signal A radar is provided which has an antenna for transmitting and receiving waves and a transmitting and receiving device for transmitting a signal from the antenna corresponding to reference pulses of a reference pulse generator and receiving with the antenn... | 01/25/1977 |
| 3996520 | Interference rejecting logarithmic receiver 1. A pulsed signal receiver comprising A pair of antennas having non-identical radiation characteristics for receiving desired pulsed signals and interfering signals of higher duty cycle than said desired signals, A pair of logarithmic receiver channels respec... | 12/07/1976 |
| 3992709 | Doppler radar A Doppler radar for use in a vehicle for predicting a collision with another vehicle, capable of detecting noise due to a false wave i.e., the transmitted wave from another vehicle having a frequency in the vicinity of the true transmitted wave frequency ... | 11/16/1976 |
| 3981012 | Random frequency radar systems 1. A random frequency radar system comprising: a normally blocked transmitting channel including a radio frequency oscillator; a receiving channel including a mixer and a local oscillator feeding said mixer; means for selecting a random pair of associated... | 09/14/1976 |
| 3936761 | Plural channel filter A signal processing arrangement which discriminates against large-amplitude nterference signals and in favor of information signals. Incoming signals are separated into a plurality of contiguous frequency channels whose total frequency coverage is the freq... | 02/03/1976 |
