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| Number | Title | Issue Date |
| 7898346 | Power supply apparatus and high-frequency circuit system A power supply apparatus for a traveling-wave tube includes an electrical discharge switch and a first resistor that are serially connected, and that are connected between a cathode electrode and a first collector electrode; N (N denotes a positive integer) arrester... | 03/01/2011 |
| 7378914 | Solid-state high-power oscillators Embodiments of High-Power Millimeter-Wave Oscillators are generally described herein. Other embodiments may be described and claimed. In some embodiments, the oscillator includes a polarized partial reflector to at least partially reflect back signals to a reflectio... | 05/27/2008 |
| 7190108 | Methods and apparatus using pulsed and phased currents in parallel plates, including embodiments for electrical propulsion First and second parallel conducting plates include arrayed conducting segments, preferably with specific spacing relative to each other and to the separation of the plates. Currents through the conducting segments are pulsed and phased to produce constructive but u... | 03/13/2007 |
| 7034739 | Delivery of quasi-periodic pulses of EM energy utilizing the principle of beating-wave amplification The present invention is related a method and system for irradiating a target location or material with high-amplitude narrow pulses of electromagnetic (EM) energy at a periodic or quasi-periodic rate. The method and system comprises generating at least three electr... | 04/25/2006 |
| 6987360 | Backward wave coupler for sub-millimeter waves in a traveling wave tube A slow wave structure for coupling RF energy with an electron beam comprises a co-propagating RF section including a plurality of pins having a uniform separation from the plane of an electron beam axis. An output aperture is positioned a half wavelength from a refl... | 01/17/2006 |
| 6700454 | Integrated RF array using carbon nanotube cathodes An array of carbon nanotube electron sources to make an integrated array of RF (radio frequency) sources in a single vacuum envelope. The RF sources can be printed circuit traveling wave tubes.... | 03/02/2004 |
| 6300715 | Very high power radiofrequency generator The disclosure relates to a radiofrequency generator including an Inductive Output Tube with an electron gun followed by an anode, the gun being raised to a high voltage in use, means producing an input radiofrequency signal and means of transmitting it t... | 10/09/2001 |
| 6034572 | Magnetically insulated line oscillator microwave pulse generator In a magnetically insulated line oscillator device having a cathode 11, a surrounding slow wave structure 15 has a tapered configuration so that the effective cavity depth in the slow wave structure 15 progressively diminishes along a part of the length o... | 03/07/2000 |
| 5742209 | Four cavity efficiency enhanced magnetically insulated line oscillator A four cavity, efficient magnetically insulated line oscillator (C4-E MILO) having seven vanes and six cavities formed within a tube-like structure surrounding a cathode. The C4-E MILO has a primary slow wave structure which is comprised of four vanes and... | 04/21/1998 |
| 5663694 | Triggered-plasma microwave switch and method A microwave switch selectively directs a microwave signal along first and second signal paths. The switch includes a microwave transmission member, a microwave chamber formed by the transmission member for containing an ionizable gas, input and output por... | 09/02/1997 |
| 5525864 | RF source including slow wave tube with lateral outlet ports Multiple radio frequency (RF) outlet ports are provided along the side of a slow wave tube to establish a distributed RF output in response to the transmission of an e- beam through the tube. The tube has a periodically rippled inner surface, a... | 06/11/1996 |
| 4988956 | Auto-resonant peniotron having amplifying waveguide section In a peniotron, a hollow electron beam is generated from a cathode gun assembly and a DC magnetic field is applied to the electron beam from solenoid coils. Thus, each electron of the electron beam is gyrated into a resonant cavity and into propagating wa... | 01/29/1991 |
| 4961058 | Feedback stabilization loop Stabilizing a signal generating source by coupling a small amount of the output power through a bandpass filter tuned to the desired frequency and injecting the power back into the source. In another embodiment the filtered power may be increased by injec... | 10/02/1990 |
| 4890036 | Miniature traveling wave tube and method of making It is an object of the invention to provide a miniature traveling wave tube which will have most of the advantages of solid state circuitry but with higher efficiency and without being highly sensitive to temperature and various types of electromagnetic r... | 12/26/1989 |
| 4827267 | High availability solid state modulator for microwave cross-field amplifiers A solid state radar transmitter pulse modulator system capable of generating high power operating pulses having pulse width and pulse repetition rate agility and being programmable for output pulse current over a substantial range of peak current values t... | 05/02/1989 |
| 4820688 | Traveling wave tube oscillator/amplifier with superconducting RF circuit Microwave oscillators and amplifiers which utilize a superconducting slow-wave circuit. The slow circuit is made from materials which exhibit superconductivity at relatively high critical temperatures. The slow wave circuit is integral with the device's v... | 04/11/1989 |
| 4785261 | Magnetically insulated transmission line oscillator A magnetically insulated transmission line oscillator employs self-generated magnetic fields to generate microwave energy. An anode of the oscillator includes slow-wave structures which are formed of a plurality of thin conductive vanes defining cavities ... | 11/15/1988 |
| 4737738 | Extended interaction device tuned by movable delay line structure A resonant cavity arranged for an electron beam to pass therethrough, is made of two spaced apart parallel substantially planar members movable with respect to each other in a direction perpendicular to their major surfaces, at least one of said members h... | 04/12/1988 |
| 4687970 | Digital cathode current control loop A digital cathode current control circuit for controlling the cathode current of a traveling wave tube (TWT) amplifier is disclosed. The cathode current control circuit includes circuitry for providing a comparison signal indicative of the occurrence and ... | 08/18/1987 |
| 4661783 | Free electron and cyclotron resonance distributed feedback lasers and masers Free-electron lasers and masers are modified by eliminating the resonator cavity as such. The feedback mechanism, essential to oscillation, is distributed through and integrated with the transmission line which guides the electromagnetic wave at the activ... | 04/28/1987 |
| 4596967 | High power microwave generator A microwave generator efficiently converts the energy of an intense relativistic electron beam (REB) into a high-power microwave emission using the Smith-Purcell effect which is related to Cerenkov radiation. Feedback for efficient beam bunching and high ... | 06/24/1986 |
| 4571524 | Electron accelerator and a millimeter-wave and submillimeter-wave generator equipped with said accelerator An electron beam device which includes a vacuum enclosure which houses an electron gun for producing an annular beam of helically rotating electrons, an iris-loaded waveguide which is supplied with high frequency power and serves to create a high frequenc... | 02/18/1986 |
| 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 |
| 4459562 | Dielectric based submillimeter backward wave oscillator circuit A ladder circuit especially useful in backward wave oscillators operating in the 500 GHz to 2,000 GHz range comprises a waveguide (10) having disposed therein transversely oriented slabs (16) which contact an upper wall (22) of waveguide (10). The edges o... | 07/10/1984 |
| 4439746 | Extended interaction microwave oscillator including a sucession of vanes with orifices This oscillator comprises a periodic structure line constituted by a succession of vanes having an orifice in which propagates a linear electron beam. This line is placed over a cavity constituted by a straight parallelepiped which has a rectangular base,... | 03/27/1984 |
| 4316155 | Voltage controlled oscillator having ratiometric and temperature compensation A voltage controlled oscillator for the conversion of a ratiometric analog signal into a digital signal is disclosed. The oscillator generates a square wave whose frequency is a function of the magnitude of the analog signal input. The variable frequency ... | 02/16/1982 |
| 4263566 | Backward wave oscillator tube utilizing successive delay line sections for increased power The present invention relates to a backward wave mode oscillator tube, the delay line of which is in two sections of dissimilar length both operating in the backward wave mode, aligned in the direction of propagation of the electrons of the beam, the seco... | 04/21/1981 |
| 4118671 | Traveling wave tube circuit A traveling wave tube (TWT) has a slow wave structure (SWS) which is severed into two or more sections. A signal path, defined below, connects the end of an SWS section to the beginning of the following SWS section. The signal path comprises an impedance ... | 10/03/1978 |
| 4038602 | Automodulated realtivistic electron beam microwave source A relativistic electron beam device for producing highpower microwave radion. The device comprises an electron beam injection gun, a drift chamber comprising a tube having a plurality of gapped resonant cavities along its length, means for converting the... | 07/26/1977 |
| 4001630 | Selectively damped travelling wave tube Selectively damped travelling wave tubes having particularly periodically alternating magnetic field for guiding the electron beam comprise a delay line consisting of cells which are separated from each other by partitions and which are positioned one beh... | 01/04/1977 |
| 3980920 | Multi-resonator microwave oscillator A microwave oscillator is provided having electron emissive means and a first surrounding resonant structure. The first structure is fabricated of a material capable of emitting secondary electrons. A second resonant structure surrounds the secondary elec... | 09/14/1976 |
