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| Number | Title | Issue Date |
| 6515539 | Microwave devices based on chemically induced dynamic electron spin polarization Optically pumped masers are described. The devices are useful for microwave amplification, microwave phase shifting and microwave limiting function. The devices are based on electron spin polarization of a stable free radical species induced by an intermo... | 02/04/2003 |
| 5422596 | High power, broadband folded waveguide gyrotron-traveling-wave-amplifier A folded waveguide gyrotron-traveling-wave-amplifier comprises: an electron gun for transmitting an axis-encircling beam of electrons with large transverse energy along a first path having an axis; an RF source for producing and applying in a second path ... | 06/06/1995 |
| 5365186 | Proton maser A method of generating microwave power by producing a charged-particle beam that is charge-neutralized by electrons. The charged particles are heavier than electrons. The charge-neutralized beam is passed through at least one conductive cavity which is re... | 11/15/1994 |
| 5363054 | Double beam cyclotron maser A double beam cyclotron maser comprising two electron guns for introducing two electron beams traveling parallel to each other at different speeds into an electron drift tube/waveguide. The beams have respectively different electron cyclotron space-charge... | 11/08/1994 |
| 5291145 | Microwave processing equipment Novel microwave processing equipment includes a silicon single crystal containing neutral {110} planar four vacancies, a cooling mechanism for holding the silicon single crystal to a low temperature, a light pumping mechanism for irradiating light to the ... | 03/01/1994 |
| 4863231 | Active optical fibre star coupler An active optical fibre star coupler having a length of amplifying optical fibre (1) optically connected at one end to a wavelength combining coupler (2) and at the other end to via a beam expanding element (3) to a set of output optical fibres.... | 09/05/1989 |
| 4829261 | Circuitless electron beam amplifier (CEBA) A traveling wave type amplifier. The device features a pair of short helical input and output couplers through which an electron beam is projected. Application of an RF signal to the couplers serves to modulate the electron beam. A drift tube to be positi... | 05/09/1989 |
| 4814728 | Ultra-stable superconducting cavity maser oscillator An ultra-stable superconducting triple cavity ruby maser oscillator (10) is obtained by providing the oscillator with a superconducting quantum interference device (SQUID) (50), which measures the magnetic field at the ruby (14) and compensates for change... | 03/21/1989 |
| 4758795 | Microwave pulse compression in dispersive plasmas A plasma-filled waveguide acts as a dispersive element for pulse compression or power multiplication of a frequency chirped microwave signal. In one embodiment, the frequency of the source is chirped near a plasma resonance while the plasma waveguide is h... | 07/19/1988 |
| 4554510 | Switching fiber optic amplifier A fiber optic amplifier utilizes a crystal fiber of laser material to bidirectionally amplify light signals. This amplifier permits the application of both pumping illumination and the signal to be amplified to the end of the crystal fiber to avoid the di... | 11/19/1985 |
| 4533875 | Wide-band gyrotron traveling-wave amplifier A high power amplifier for amplifying millimeter-wave radiation comprising: a length of metallic waveguide tapered from a small cross-sectional end to a larger cross-sectional end; a magnetron-type electron injection gun for injecting a spiral beam of rel... | 08/06/1985 |
| 4480234 | Gyrotron backward wave oscillator device A gyrotron backward wave oscillator device is described which can be operated in a controlled and predictable manner. The device includes an evacuated waveguide section, an electron source at one end providing a spiral electron beam, a collector at the op... | 10/30/1984 |
| 4456912 | High energy microwave defense system A defense system wherein a radar intercepts and follows a target and includes an antenna array and a low level source of microwave energy for exciting the elements of the array to produce radar returns and define the path. A microwave storage reservoir is... | 06/26/1984 |
| 4422045 | Barnetron microwave amplifiers and oscillators A cyclotron maser microwave amplifier and oscillator which utilizes non-relativistic electrons in cyclotron motion and a spatially nonlinear electrostatic field which is produced by the space charge of the electrons. The term "spatially nonlinear electros... | 12/20/1983 |
| 4399415 | Resonant isolator for maser amplifier An isolator is described for use in a low-noise maser amplifier, which provides low loss across a wide bandwidth and which can be constructed at moderate cost. The isolator (40) includes a train of garnet or ferrite elements (50, 52) extending along the l... | 08/16/1983 |
| 4370621 | High efficiency gyrotron oscillator and amplifier An electron cyclotron maser high-frequency generator/amplifier having a cavity resonator positioned in an axial magnetic field. A spiralling beam of relativistic electrons is injected into the cavity and stimulated emission of radiation by the electrons t... | 01/25/1983 |
| 4253068 | Cyclotron maser using a spatially nonlinear electrostatic field A cyclotron maser microwave amplifier or oscillator which utilizes non-relativistic electrons (or other charged particles) in cyclotron motion and a spatially nonlinear electrostatic field. The term "spatially nonlinear electrostatic field" encompasses st... | 02/24/1981 |
| 4224576 | Gyrotron travelling-wave amplifier An apparatus for amplifying coherent radiation at millimeter and submillimeter wavelengths includes the combination of a travelling-wave-tube cyclotron-maser-amplifier structure and a magnetron-injection electron gun. The amplifier structure includes a ... | 09/23/1980 |
| 4209752 | Getter pump for hydrogen maser An improved getter for a hydrogen maser comprised of screened particles of zirconium-aluminum alloy. One or more pump bodies are connected with a hydrogen maser and each pump body contains a quantity of Zr-Al alloy particles. One or more screens are provi... | 06/24/1980 |
| 4187470 | Dielectric-loaded waveguide circulator for cryogenically cooled and cascaded maser waveguide structures A dielectrically loaded four-port waveguide circulator is used with a reflected-wave maser connected to a second port between first and third ports to form one of a plurality of cascaded maser waveguide structures. The fourth port is connected to a wavegu... | 02/05/1980 |
| 4055810 | Independent gain and bandwidth control of a traveling wave maser An X-band traveling wave maser of the folded-comb type is provided with two figure-eight coils for gain and bandwidth control. One figure-eight coil covers the full length of the comb structure for bandwidth adjustment of an external magnetic field. The o... | 10/25/1977 |
| 3978417 | Reflected-wave maser A number of traveling-wave, slow-wave maser structures, containing active maser material but absent the typical ferrite isolators, are immersed in a nonuniform magnetic field. The microwave signal to be amplified is inserted at a circulator which directs ... | 08/31/1976 |
