1
Thomas E McEwan: Impulse radar studfinder. The Regents of the University of California, Henry P Sartorio, October 10, 1995: US05457394 (201 worldwide citation)

An impulse radar studfinder propagates electromagnetic pulses and detects reflected pulses from a fixed range. Unmodulated pulses, about 200 ps wide, are emitted. A large number of reflected pulses are sampled and averaged. Background reflections are subtracted. Reflections from wall studs or other ...


2
Thomas E McEwan: Ultra-wideband receiver. The Regents of the University of California, Henry P Sartorio, June 4, 1996: US05523760 (198 worldwide citation)

An ultra-wideband (UWB) receiver utilizes a strobed input line with a sampler connected to an amplifier. In a differential configuration, .+-.UWB inputs are connected to separate antennas or to two halves of a dipole antenna. The two input lines include samplers which are commonly strobed by a gatin ...


3
Thomas E McEwan: Ultra-wideband radar motion sensor. Regents of the University of California, Henry P Sartorio, November 1, 1994: US05361070 (187 worldwide citation)

A motion sensor is based on ultra-wideband (UWB) radar. UWB radar range is determined by a pulse-echo interval. For motion detection, the sensors operate by staring at a fixed range and then sensing any change in the averaged radar reflectivity at that range. A sampling gate is opened at a fixed del ...


4
Thomas E McEwan: Material level sensor having a wire-horn launcher. McEwan Technologies, Mark A Haynes, Haynes Beffel & Wolfeld, September 17, 2002: US06452467 (175 worldwide citation)

A single-wire time-domain reflectometer (TDR) combines the best performance features of prior art “electronic dipsticks” in a high accuracy implementation that allows tank penetration though a small opening. A wire-horn structure is employed to launch TDR pulses onto a single wire transmission line, ...


5
Thomas E McEwan: High speed transient sampler. The Regents of the University of California, Henry P Sartorio, November 28, 1995: US05471162 (133 worldwide citation)

A high speed sampler comprises a meandered sample transmission line for transmitting an input signal, a straight strobe transmission line for transmitting a strobe signal, and a plurality of sampling gates along the transmission lines. The sampling gates comprise a four terminal diode bridge having ...


6
Thomas E McEwan: High speed sampler and demultiplexer. The Regents of the University of California, Henry P Sartorio, December 26, 1995: US05479120 (126 worldwide citation)

A high speed sampling demultiplexer based on a plurality of sampler banks, each bank comprising a sample transmission line for transmitting an input signal, a strobe transmission line for transmitting a strobe signal, and a plurality of sampling gates at respective positions along the sample transmi ...


7
Thomas E McEwan: Homodyne impulse radar hidden object locator. The Regents of the University of California, Henry P Sartorio, April 30, 1996: US05512834 (119 worldwide citation)

An electromagnetic detector is designed to locate an object hidden behind a separator or a cavity within a solid object. The detector includes a PRF generator for generating 2 MHz pulses, a homodyne oscillator for generating a 2 kHz square wave, and for modulating the pulses from the PRF generator. ...


8
Thomas E McEwan: Body monitoring and imaging apparatus and method. The Regents of the University of California, Henry P Sartorio, June 16, 1998: US05766208 (119 worldwide citation)

A non-acoustic pulse-echo radar monitor is employed in the repetitive mode, whereby a large number of reflected pulses are averaged to produce a voltage that modulates an audio oscillator to produce a tone that corresponds to the heart motion. The antenna used in this monitor generally comprises two ...


9
Thomas E McEwan: Body monitoring and imaging apparatus and method. The Regents of the University of California, Henry P Sartorio, November 12, 1996: US05573012 (116 worldwide citation)

A non-acoustic pulse-echo radar monitor is employed in the repetitive mode, whereby a large number of reflected pulses are averaged to produce a voltage that modulates an audio oscillator to produce a tone that corresponds to the heart motion. The antenna used in this monitor generally comprises two ...


10
Thomas E McEwan: Time-of-flight radio location system. The Regents of the University of California, Henry P Sartorio, April 23, 1996: US05510800 (111 worldwide citation)

A bi-static radar configuration measures the direct time-of-flight of a transmitted RF pulse and is capable of measuring this time-of-flight with a jitter on the order of about one pico-second, or about 0.01 inch of free space distance for an electromagnetic pulse over a range of about one to ten fe ...