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| Number | Title | Issue Date |
| 8179045 | Slow wave structure having offset projections comprised of a metal-dielectric composite stack A traveling wave amplifier circuit to receive an RF wave and an electron sheet beam and to effect synchronized interaction therebetween. The circuit includes a wave guide having at least a first wall and a second wall opposite the first wall. The first wall and the ... | 05/15/2012 |
| 7952288 | Power supply apparatus and high-frequency circuit system The present invention includes a Zener diode connected between a helix electrode and an anode electrode, a transistor that closes or opens a circuit between a cathode and an anode of the Zener diode, a photocoupler for turning ON/OFF the transistor through a phototr... | 05/31/2011 |
| 7952287 | Traveling-wave tube 2D slow wave circuit A two-dimensional circuit for a traveling-wave tube for millimeter and sub-millimeter electromagnetic waves synchronously interacts with an electron beam in a vacuum electronic microwave amplifier or oscillator. The circuit is a solid body having a length along the ... | 05/31/2011 |
| 7898181 | Traveling wave tube A bottom portion of a metal tape is attached to an end portion of a helix. A coaxial inner conductor for input or output of a high frequency signal is fixed by its end portion being interposed between upright surfaces of the metal tape. The metal tape is joined to t... | 03/01/2011 |
| 7893620 | Traveling-wave tube turn-off body energy circuit An apparatus that includes a traveling-wave tube having an electron gun having a cathode. The apparatus also includes a first power supply for establishing a first electric potential between the cathode and an anode and for providing an operational current to the ca... | 02/22/2011 |
| 7812540 | Method for making electrodes and vacuum tube using same The invention relates to vacuum tubes and especially to electron tubes. To produce the tube, and especially an electron collector comprising several electrodes, the electrodes are produced in the form of blocks of ceramic having a high thermal conductivity. The bloc... | 10/12/2010 |
| 7638946 | Apparatus and method for trajectory modulation of an electron beam An electron beam amplification device provides trajectory modulation of an electron beam, and includes an electron gun, a modulator, an interceptor, an output circuit, and a collector. The electron gun produces an electron beam. The modulator receives an RF input si... | 12/29/2009 |
| 7579778 | Traveling-wave tube with integrated ion trap power supply A traveling-wave tube system and a method for protecting a cathode of a traveling-wave tube system. The system has an electron gun and a power supply that applies an electric potential between a cathode and an anode of the electron gun to generate a beam of electron... | 08/25/2009 |
| 7489084 | Power supply apparatus and high frequency circuit system A power supply apparatus for supplying predetermined supply voltages respectively to an anode electrode, a cathode electrode, a collector electrode, and a helix of an electron tube. The power supply apparatus comprises an anode switch for turning on/off the anode vo... | 02/10/2009 |
| 7368874 | Dynamic depressed collector A biasing system for use with a multi-stage depressed collector of a high power amplifier includes one or more adjustable power sources. A power controller provides control signals to the power sources depending on the operational RF power level. For low power appli... | 05/06/2008 |
| 7359206 | Radio frequency isolation system and cover assembly for vacuum electron device A self-guiding cover assembly for a vacuum electron device (VED) enclosure (704, 1316) has a cover (1002, 1302), a pair of guide plates, and a pair of guide elements (1304, 1306). The cover has at least one electrical connector (1314) dis... | 04/15/2008 |
| 7352269 | Method for making magnetic components with N-phase coupling, and related inductor structures Methods and structures for constructing a magnetic core of a coupled inductor. The method provides for constructing N-phase coupled inductors as both single and scalable magnetic structures, where N is an integer greater than 1. The method additionally describes how... | 04/01/2008 |
| 7352263 | Method and mechanism for tuning dielectric resonator circuits The invention comprises a technique and associated mechanisms by which dielectric resonator circuits, such as filters, can be tuned in both frequency, bandwidth or both without the need for irises, tuning screws and/or tuning plates. In accordance with the invention... | 04/01/2008 |
| 7352264 | Electronically tunable dielectric resonator circuits In order to permit electronic tuning of the frequency of a circuit including dielectric resonators, such as a dielectric resonator filter, tuning plates are employed adjacent the individual dielectric resonators. The tuning plates comprises two separate conductive p... | 04/01/2008 |
| 7339322 | Apparatus and methods for making spectroscopic measurements of cathode fall in fluorescent lamps Apparatus and methods are disclosed for measuring cathode fall within a fluorescent lamp that contains an electrode and a gas. A level of cathode fall associated with the electrode may be identified based on an intensity and wavelength of radiation emitted by the ga... | 03/04/2008 |
| 7332736 | Article comprising gated field emission structures with centralized nanowires and method for making the same This invention provides novel methods of fabricating novel gated field emission structures that include aligned nanowire electron emitters (individually or in small groups) localized in central regions within gate apertures. It also provides novel devices using nano... | 02/19/2008 |
| 7323877 | Apparatus and methods for making spectroscopic measurements of cathode fall in fluorescent lamps Apparatus and methods are disclosed for measuring cathode fall within a fluorescent lamp that contains an electrode and a gas. A level of cathode fall associated with the electrode may be identified based on an intensity and wavelength of radiation emitted by the ga... | 01/29/2008 |
| 7315126 | Folded waveguide traveling wave tube having polepiece-cavity coupled-cavity circuit An amplifying device comprises an electron gun emitting an electron beam, a collector spaced from the electron gun, the collector oriented to collect electrons of the electron beam emitted from the electron gun, and an interaction structure interposed between the el... | 01/01/2008 |
| 7309639 | Method of forming a metal trace with reduced RF impedance resulting from the skin effect The RF impedance of a metal trace at gigahertz frequencies is reduced by forming the metal trace to have a base region and a number of fingers that extend away from the base region. When formed to have a number of loops, the metal trace forms an inductor with an inc... | 12/18/2007 |
| 7310031 | Dielectric resonators and circuits made therefrom A dielectric resonator having variable cross-section, preferably varying monotonically, and, most preferably, the resonator being in the shape of a truncated cone. Such shapes displace the H11 mode from the TE mode in the longitudinal direction of the con... | 12/18/2007 |
| 7288321 | Carbon nanotube array and method for forming same A method for forming a carbon nanotube array on a metal substrate includes the following steps: providing a metal substrate (11); depositing a silicon layer (21) on a surface of the metal substrate; depositing a catalyst layer (31) on the silico... | 10/30/2007 |
| 7276389 | Article comprising metal oxide nanostructures and method for fabricating such nanostructures This invention discloses novel field emitters which exhibit improved emission characteristics combined with improved emitter stability, in particular, new types of carbide or nitride based electron field emitters with desirable nanoscale, aligned and sharped-tip emi... | 10/02/2007 |
| 7265360 | Magnetron anode design for short wavelength operation An electromagnetic radiation source is disclosed. The electromagnetic radiation source includes an anode having a first conductor, a second conductor positioned relative to the first conductor, a plurality of pole pieces coupled to at least one of the first conducto... | 09/04/2007 |
| 7259510 | On-chip vacuum tube device and process for making device A microelectromechanical microwave vacuum tube device is disclosed. The device consists of a cathode formed on a substrate, the cathode comprising electron emitters. A cathode emission control grid is also attached to the device substrate. The device further include... | 08/21/2007 |
| 7259519 | Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps Apparatus and methods for measuring cathode fall in fluorescent lamps are disclosed. Together with measurements of cathode temperature, such measurements of cathode fall may inform a determination of cathode heater voltage as a function of discharge current (i.e., a... | 08/21/2007 |
| 7253109 | Method of depositing a tantalum nitride/tantalum diffusion barrier layer system We have discovered a method of providing a thin, approximately from about 2 Å to about 100 Å thick TaN seed layer, which can be used to induce the formation of alpha tantalum when tantalum is deposited over the TaN seed layer. Further, the ... | 08/07/2007 |
| 7242135 | High voltage connection for vacuum electron device A high voltage direct current contact for a vacuum electron device (VED), including (a) an outer cathode line having a first hollow cylinder having a first VED connection end, (b) a contact block removably positioned within the outer cathode line, having a heater co... | 07/10/2007 |
| 7233101 | Substrate-supported array having steerable nanowires elements use in electron emitting devices In accordance with the inventions, a new configuration of spaced-apart nanostructures is provided as well as a variety of improved articles using the new configuration. Improved articles include microwave amplifiers, field emission displays, plasma displays, electro... | 06/19/2007 |
| 7230384 | Robust RF interface in a TWT Apparatus and methods provide a robust radio frequency (RF) interface for a helix-type traveling wave tube (TWT). As a vacuum device, the RF input to the TWT and the RF output from the TWT are sealed to maintain the vacuum. The disclosed robust RF interface techniqu... | 06/12/2007 |
| 7230385 | Collector arrangement A collector for an electron beam tube comprises a plurality of electrode stages. The electrode stages are spaced from one another by a non-conductive spacer. The non-conductive spacer is located between portions of electrodes and extends into the collector on a firs... | 06/12/2007 |
| 7218053 | Electron beam tube output arrangement An electron beam tube of the type for amplification of RF signals comprising an electron gun, an interaction region within a vacuum, an RF input and an RF output arrangement, the RF output arrangement comprising an output coaxial line and a coaxial divider, wherein ... | 05/15/2007 |
| 7206379 | RF accelerator for imaging applications The present invention is an RF cavity for accelerating electrons in imaging applications such as x-ray tubes and CT applications. An RF cavity having electron emitters placed therein accelerates the electrons across the cavity. The geometric shape of the cavity dete... | 04/17/2007 |
| 7196601 | Temperature correction of wigglers and undulators An undulator includes a periodic arrangement of magnets to produce a periodic spatial magnetic field distribution in a magnetic gap defined by the magnets. The undulator further includes a temperature-compensating material selectively arranged to compensate for a te... | 03/27/2007 |
| 7195938 | Activation effect on carbon nanotubes Particles, which may include nanoparticles, are mixed with carbon nanotubes and deposited on a substrate to form a cold cathode. The particles enhance the field emission characteristics of the carbon nanotubes. An additional activation step may be performed on the d... | 03/27/2007 |
| 7193415 | Magnetic lens, method and focus volume imaging MRI A ferromagnetic lens in the presence of a DC magnetic field and a smaller AC magnetic field creates a localized minimum of the magnitude of the magnetic field vector of the combined magnetic field in a volume defined in free space away from the lens referred to as t... | 03/20/2007 |
| 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 |
| 7183881 | Cross-coupled dielectric resonator circuit A cross-coupled dielectric resonator circuit. Resonator circuits in accordance with the invention may be used to build low-loss compact filters, oscillators, and other circuits, particularly microwave circuits. The resonators are arranged relatively to each other wi... | 02/27/2007 |
| 7148778 | High performance hybrid magnetic structure for biotechnology applications The present disclosure provides a high performance hybrid magnetic structure made from a combination of permanent magnets and ferromagnetic pole materials which are assembled in a predetermined array. The hybrid magnetic structure provides for separation and other b... | 12/12/2006 |
| 7147894 | Method for assembling nano objects A method for the self assembly of a macroscopic structure with a pre-formed nano object is provided. The method includes processing a nano object to a desired aspect ratio and chemical functionality and mixing the processed nano object with a solvent to form a suspe... | 12/12/2006 |
| 7142052 | Travelling wave amplifiers A traveling wave amplifier (TWA) comprising two or more amplification modules, the inputs of adjacent amplification modules being connected together by a first inductance component of a first characteristic impedance, a second inductance component of a second charac... | 11/28/2006 |
