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| Number | Title | Issue Date |
| 7274147 | Magnetron A magnetron which generates a high-frequency energy in the Terahertz band is provided. The magnetron includes a cathode unit, which is connected to a terminal of a power source, and which selectively emits an electron according to when power is supplied; an anode bl... | 09/25/2007 |
| 7257327 | Wireless communication system with high efficiency/high power optical source An optical communication system is provided which includes an optical signal transmitter which communicates high bandwidth, high power frequencies. The optical signal transmitter includes a high efficiency/high power optical source such as an optical magnetron or a ... | 08/14/2007 |
| 7164234 | High-power microwave system employing a phase-locked array of inexpensive commercial magnetrons A high-power microwave generator employing a plurality of inexpensive commercial magnetron tubes cross-coupled by means of a secondary coupling path between each magnetron output pair, whereby a portion of the output energy from a first magnetron tube is injected in... | 01/16/2007 |
| 6985042 | Magnetron The object to the present invention is to provide a magnetron which can reduce spurious oscillation such as the π−1 mode which presents a problem particularly in magnetrons and can reduce spurious radiations without placing filters. The magnetron of the present i... | 01/10/2006 |
| 5721470 | Microwave generator apparatus comprising controller for automatically adjusting filament power of a magnetron In a microwave generator apparatus including a magnetron having a filament and an anode and generating a microwave, a filament power source supplies a filament power to the filament of the magnetron, and an anode power source applies an anode voltage betw... | 02/24/1998 |
| 5571439 | Magnetron variable power supply with moding prevention A power supply for a magnetron varies a power output level and prevents moding of the magnetron. To provide a variable power output, a microprocessor senses an anode current and voltage of the magnetron. Based on the sensed signals, the microprocessor adj... | 11/05/1996 |
| 5537084 | Method for improving spectrum quality of low power pulsed anode magnetrons An improved low power pulsed anode magnetron is provided having a cylindrical cathode centrally disposed within a plurality of radial anode vanes. An interaction region is provided between the surface of the cathode and the anode vane tips. A ratio of the... | 07/16/1996 |
| 5373263 | Transverse mode electron beam microwave generator An electron beam microwave device having an evacuated interaction chamber to which are coupled a resonant cavity which has an opening between the resonant cavity and the evacuated interaction chamber and an electron gun which causes a narrow beam of elect... | 12/13/1994 |
| 5089744 | Magnetron choke for microwave oven A magnetron choke for microwave ovens has a tube member having its wall divided into two side walls of different heights respectively on each side of slots in the tube wall to provide two resonant points for suppressing harmonics in a wider range of frequ... | 02/18/1992 |
| 5038077 | Gyroklystron device having multi-slot bunching cavities A gyroklystron device includes an electron beam source, a plurality of bunching cavities and an output cavity. A first bunching cavity has an input coupling aperture for receiving an rf signal from an rf signal injecting source. Each of the bunching cavit... | 08/06/1991 |
| 5015914 | Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide In a gyrotron cavity resonator, generated energy is extracted into a symmetric set of fundamental-mode waveguides by ports disposed to couple energy in phase from the operating electromagnetic mode but in anti-phase with respect to an unwanted mode of low... | 05/14/1991 |
| 4851788 | Mode suppressors for whispering gallery gyrotron A gyrotron interaction resonator 29 operating in a TEn1 cavity mode has an array of longitudinal slots 32 in the conductive wall 30. The slots 32 are spaced to couple to the unwanted TEn1 modes and to other modes of differing n and n... | 07/25/1989 |
| 4833367 | Magnetron with resonant choke structure for supressing unwanted harmonics A magnetron comprises an anode cylinder, vanes extending radially and inwardly from the anode cylinder, an output-side-sealing metal cylinder sealed to the end of the anode cylinder, an antenna lead connected to one of said vanes and a plurality of flange... | 05/23/1989 |
| 4588965 | Coaxial magnetron using the TE111 mode A coaxial magnetron has a high-Q resonant cavity surrounding a multiple-resonator anode circuit and coupled by slots to alternate anode resonators. The cavity is resonant in the TE111 mode, having two zero points of electric field on its periph... | 05/13/1986 |
| 4504767 | Magnetron mode detector A mode detector for microwave oven magnetrons is disclosed including means for sensing interruption of anode current and providing a discrete indication thereof. An alternative embodiment discloses means to count the number of such interruptions. A method... | 03/12/1985 |
| 4489254 | Magnetron Disclosed is a magnetron for a microwave oven which has a drain electrode (60) near a cathode (25) and in a position where an electron beam path is not interfered with. The cathode and the drain electrode are formed in spiral shapes. Turns of the cathode ... | 12/18/1984 |
| 4480235 | Coaxial magnetron with improved starting The cathode of a coaxial magnetron has a cylindrical electron emitter with a radially extending projection which is asymmetrical with respect to the axis of the emitter. The projection suppresses starting of the magnetron in the TE121 mode and ... | 10/30/1984 |
| 4459563 | Magnetron unit with choke structure for reducing higher harmonics in microwave output A magnetron of simplified mechanical construction and including choke structures for harmonic suppression. The structure includes an anode cylinder having a plurality of vanes therein and upper and lower open ends; a cathode within said anode cylinder; a ... | 07/10/1984 |
| 4371848 | Magnetron having a filter on the output probe A simple but effective filter attenuating one or more frequencies other than the fundamental frequency of a magnetron is provided in the magnetron. The filter comprises one or more stubs each of which extends along one side of an output probe connected to... | 02/01/1983 |
| 4194142 | Mode control apparatus for a separable-insert coaxial magnetron A standard demountable coaxial magnetron has a cathode and a surrounding de shell formed with slots through which electromagnetic energy is coupled into an external resonant stabilizing cavity. The anode and its associated components are contained in a v... | 03/18/1980 |
| 4129834 | Resonant cavity magnetron with choke structure for reducing harmonics in output system Disclosed is a magnetron with a folded 1/4λ choke for suppression of higher harmonics formed by three coaxial conductors, the inner one of which is connected to the output probe of the magnetron.... | 12/12/1978 |
| 4053850 | Magnetron slot mode absorber In a coaxial magnetron the resonant circuit interacting with the electrons is coupled to a stabilizing resonator operating in a mode with circular electric field. The coupling is thru a set of slots in the intervening wall. Undesirable resonances localize... | 10/11/1977 |
| 4006382 | Magnetron filter A harmonic frequency suppressor is disclosed for microwave magnetrons having an output antenna probe member. A coaxial cylindrical member is disposed within the vacuum envelope to provide in combination with the antenna probe member a line filter for supp... | 02/01/1977 |
