Chester Phillips - Germantown MD, US Paul Johnson - Kihei HI, US Randall Olsen - Carlsbad CA, US John Lovberg - San Diego CA, US Kenneth Tang - Alpine CA, US George Houghton - San Diego CA, US Vladimir Kolinko - San Diego CA, US
International Classification:
H04B007/00
US Classification:
455/500000, 455/269000
Abstract:
A point-to-point, wireless, millimeter wave communications links equipped with tracking antennas to maintain pencil beam contact between the links. In a preferred embodiment the antennas are flat panel tracking antennas and the communication links operate within the 92 to 95 GHz portion of the millimeter spectrum and provides data transmission rates in excess of 155 Mbps. A first transceiver transmits at a first bandwidth and receives at a second bandwidth both within the above spectral range. A second transceiver transmits at the second bandwidth and receives at the first bandwidth. The transceivers are equipped with antennas providing beam divergence small enough to ensure efficient spatial and directional partitioning of the data channels so that an almost unlimited number of transceivers will be able to simultaneously use the same spectrum. In a preferred embodiment the first and second spectral ranges are 92.3-93.2 GHz and 94.1-95.0 GHz and the half power beam width is about 0.36 degrees or less.
Chester C. Phillips - Rockville MD William H. Zinger - Columbia MD Robert F. Platte - Laurel MD Melrose M. Jesurun - Silver Spring MD Dennis H. Matthias - Columbia MD
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
G01S 740
US Classification:
343 177
Abstract:
A test set for an amplifier or other electronic device in which a waveform enerator furnishes a modulated RF signal to the item under test. Sensors extract samples of the RF signal at the item's input and output. A detector-mixer network compares and processes the input and output sample signals and produces signals at its output which are indicative of the phase distortion and amplitude distortion introduced by the item. The phase and amplitude distortion signals are sampled and held for each modulating signal pulse and are then processed to compile statistical data regarding the item's performance.
Chester C. Phillips - Columbia MD Shiow-Hwa Lin - San Diego CA
Assignee:
Thermo Electron Technologies Corp. - San Diego CA
International Classification:
H01S 319
US Classification:
372 44
Abstract:
A beam of radiation radiates in sequence an array of semi-conductor switches at an extremely rapid rate. Electron-hole pairs created by radiation permit the semiconductor switches to conduct electric current for a very brief period of time.
An electronic means to cyclically control the heat or air conditioning source in an environmental temperature control system so that the heat exchange surfaces are maintained within a predetermined range to maximize heat exchange efficiency and minimize total operating time of the heat or cooling source. The apparatus incorporates a temperature responsive transducer which provides a voltage level that is compared to an analog representation of a controllable, periodic output of a digital counter to produce a signal for selectively energizing the heat or cooling source of the environmental temperature control system for a time period proportional to heat demand but limited to relatively short durations of time so as to minimize or limit the temperature of the heat exchange surface during temperature modification demand periods.