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US Patent 6844786 - Millimeter- and submillimeter-wave noise generator
US Patent Issued on January 18, 2005
Estimated Patent Expiration Date:
August 21, 2021Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
August 21, 2021Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA noise generator for generating multi-octave, high-level, millimeter- and submillimeter-wave noise is disclosed. According to one embodiment of the invention, the noise generator includes: a microwave noise source; a microwave power-amplifier chain; a level-set attenuator; a frequency multiplier; and a transmission structure. The output of the generator has a high-intensity noise power spectrum over a frequency range from about 60 GHz to about 1 THz. This type of noise is particularly suited and has sufficient power for testing and calibrating millimeter- and submillimeter-wave components, devices, and circuits; material evaluation and characterization; and for use as a broadband millimeter- and submillimeter-wave noise source for a Fourier Transform Spectrometer.Other References
| InventorsAssigneeApplicationNo. 09932977 filed on 08/21/2001US Classes:331/78, ELECTRICAL NOISE OR RANDOM WAVE GENERATOR324/637, Using transmitted or reflected microwaves356/450, BY LIGHT INTERFERENCE (E.G., INTERFEROMETER)342/156, Interferometer250/493.1, RADIANT ENERGY GENERATION AND SOURCES342/14, ECM (Electronic countermeasures, i.e., jamming)342/371, With electronic scanning367/1, SONAR COUNTER-MEASURES702/57, Electrical signal parameter measurement system455/67.12, Using a chamber (e.g., room testing or audio surveillance, etc.)324/640, To determine water content340/572.2, Specified relationship between field and detection frequencies (e.g., nth order harmonics)257/25, Employing resonant tunneling257/449, Schottky barrier (e.g., a transparent Schottky metallic layer or a Schottky barrier containing at least one of indium or tin (e.g., SnO 2 , indium tin oxide))342/202, For pulse modulation342/13, RADAR EW (ELECTRONIC WARFARE)375/261, Quadrature amplitude modulation455/324, Homodyne (i.e., zero beat or synchrodyne reception)331/107SL, Stripline type331/117DDistributed parameter resonator transistor oscillatorsField of Search331/78, ELECTRICAL NOISE OR RANDOM WAVE GENERATOR331/117D, Distributed parameter resonator transistor oscillators331/96, WITH DISTRIBUTED PARAMETER RESONATOR331/107SL, Stripline type324/633, Using resonant frequency324/637, Using transmitted or reflected microwaves324/603, For excitation324/317, Including a test sample and control sample324/318, Spectrometer components342/156, Interferometer356/450, BY LIGHT INTERFERENCE (E.G., INTERFEROMETER)250/493.1, RADIANT ENERGY GENERATION AND SOURCES455/327StriplineExaminersPrimary: Kinkead, ArnoldAttorney, Agent or FirmUS Patent References2658992, 3750168, 3750175, 3942179, Filtered-noise jammerIssued on: 03/02/1976 Inventor: Dorn4219885, Sonar target simulator Issued on: 08/26/1980 Inventor: Routh , et al.4521861, Method and apparatus for enhancing radiometric imaging Issued on: 06/04/1985 Inventor: Logan , et al.4742561, Apparatus for generating signals useful for testing the sensitivity of microwave receiving equipment Issued on: 05/03/1988 Inventor: Tipton4873481, Microwave radiometer and methods for sensing atmospheric moisture and temperature Issued on: 10/10/1989 Inventor: Nelson, et al.5349332, EAS system with requency hopping Issued on: 09/20/1994 Inventor: Ferguson, et al.5554860, Resonant tunneling transistor noise generator Issued on: 09/10/1996 Inventor: Seabaugh5631489, Optoelectronic device Issued on: 05/20/1997 Inventor: Roser5726657, Phase coherent radar system using fast frequency agile waveform synthesis Issued on: 03/10/1998 Inventor: Pergande, et al.5777572, Device for damaging electronic equipment using unfocussed high power millimeter wave beams Issued on: 07/07/1998 Inventor: Janusas5903609, Transmission system using transmitter with phase modulator and frequency multiplier Issued on: 05/11/1999 Inventor: Kool, et al.5953643, Receiver circuit Issued on: 09/14/1999 Inventor: Speake, et al.6239663, High-frequency oscillator using FETs and transmission lines Issued on: 05/29/2001 Inventor: Mizutani6252469Microwave/millimeter-wave injection/synchronization oscillator Issued on: 06/26/2001 Inventor: Suematsu International ClassH03B 2900 |
