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| Number | Title | Issue Date |
| 7283014 | High power absorbing waveguide termination for a microwave transmission line A high power absorbing waveguide termination for a microwave transmission line has a power receiving end with a waveguide input port, an oversize waveguide section, and a transforming waveguide section for connecting the waveguide input port to the oversize waveguid... | 10/16/2007 |
| 7053750 | Voltage probe systems having improved bandwidth capability A resistive pin for use in a voltage probe includes a pin-head that is configured to contact a test point in a device under test, and a resistor that is attached to the pin-head. Other systems are also provided for establishing electrical connections between testing... | 05/30/2006 |
| 6094107 | Air cooled termination for transmission lines A termination for a coaxial transmission line wherein an elongated central conductor is located in an enclosure or housing and is surrounded by a plurality of elongated resistor tubes. The central conductor is connected to the inner conductor of the trans... | 07/25/2000 |
| 5949298 | High power water load for microwave and millimeter-wave radio frequency sources A high power water load for microwave and millimeter wave radio frequency sources has a front wall including an input port for the application of RF power, a cylindrical dissipation cavity lined with a dissipating material having a thickness which varies ... | 09/07/1999 |
| 5742211 | Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite A billet of low-density carbon-bonded carbon fiber (CBCF) composite is machined into a desired attenuator or load element shape (usually tapering). The CBCF composite is used as a free-standing load element or, preferably, brazed to the copper, brass or a... | 04/21/1998 |
| 5488334 | Air-cooled power load The power loads in certain applications such as dummy antennas must have a substantially constant impedance in a wide band of frequencies. The power load is air-cooled and its resistive element is constituted by the series-connection of resistor modules m... | 01/30/1996 |
| 5422463 | Dummy load for a microwave dryer A matched or dummy load for a microwave dryer having a microwave generator and a microwave applicator. The matched load includes a waveguide having opposed broad walls, opposed narrow walls, and an end wall defining a waveguide chamber. A power absorbing ... | 06/06/1995 |
| 5187408 | Quasi-optical component and gyrotron having undesired microwave radiation absorbing means A quasi-optical component for microwave radiation comprises a quasi-optical element (16a) which radiates incident microwave radiation along a major axis (19) and which has a characteristic transverse dimension (D) which is smaller than 50-times one wavele... | 02/16/1993 |
| 5175516 | Waveguide termination A liquid cooled adjustable waveguide termination for use in high power applications is described. The liquid cooled adjustable termination includes a waveguide housing having a shorting plate disposed at an end portion of the housing and an electromagneti... | 12/29/1992 |
| 5049840 | Cooling device for electrical circuit configurations The invention relates to a cooling device for circuit configurations in which high electrical energies are converted and specifically for electrical matching circuits with which the impedance of a plasma path is matched to a high frequency generator. Here... | 09/17/1991 |
| 4968150 | Process and arrangement for measuring the energy of a microwave pulse In an arrangement for measuring the energy of a microwave pulse a container (2) is placed on the end of a waveguide (1). In container (2) there is an absorption liquid (3) with a given heat content, which absorbs the energy of the irradiated microwave pul... | 11/06/1990 |
| 4939787 | Temperature controlled resistive-liquid dummy load A dummy load for a radio frequency transmitter uses a resistive liquid within a tube of non-conducting material as the load. The tube has grounded conductors at each end, and a centrally-located terminal that provides a load, with respect to ground, acros... | 07/03/1990 |
| 4835354 | Microwave heating apparatus for laboratory analyses A microwave oven particularly suitable for laboratory analytical use is described. The oven is designed for chemical digestion and the drying of materials to very low moisture levels. The oven utilizes a rotating platform to move the material being subjec... | 05/30/1989 |
| 4799031 | Waveguide device for producing absorption or attenuation A waveguide device for producing absorption or attenuation includes a waveguide section which is provided with an external absorber material. For allowing a transfer of the high-frequency power into the absorber material, the wave section is provided with... | 01/17/1989 |
| 4760312 | Dense silicon carbide microwave absorber for electron linear accelerator A microwave absorber composed of dense silicon carbide having an electrical resistivity of one ohm-centimeter or more. In an electron linear accelerator, it is necessary to provide a microwave absorber to absorb excess energy used to accelerate electrons ... | 07/26/1988 |
| 4754238 | Microwave absorber using gaseous cooling fluid A microwave absorber with a microwave-absorbing material, a protective hong surrounding this, and a waveguide leading into the protective housing, through which waveguide the microwaves to be absorbed can be conducted to the absorbing material, the micro... | 06/28/1988 |
| 4740763 | Microwave calorimeter A microwave calorimeter for very high power, with a housing, which surrou a feed chamber, into which a waveguide runs for feeding the microwaves, and an absorber-chamber which is separated from the feed chamber by a dielectric wall and contains a microwa... | 04/26/1988 |
| 4694264 | Radio frequency coaxial feedthrough device A radio frequency coaxial vacuum feedthrough is provided which utilizes a cylindrical ceramic vacuum break formed of an alumina ceramic. The cylinder is coaxially disposed and brazed between tapered coaxial conductors to form a vacuum sealed connection be... | 09/15/1987 |
| 4638268 | Microwave absorber comprised of a dense silicon carbide body which is water cooled A microwave absorber, particularly, a microwave absorber intended for use in an electron beam accelerator, having an increased maximum power characteristic. The microwave absorber is formed of a body of dense silicon carbide having a hollow portion and a ... | 01/20/1987 |
| 4625089 | Water load container device for a microwave heat applicator A modularized water load device for a microwave heat applicating unit comprising a resonator, a waveguide and a source of microwave energy. The constituent units or components of the water load device are arranged in a sandwich like manner to form a readi... | 11/25/1986 |
| 4617440 | Microwave heating device A microwave power head or modular heat applicating unit comprising a resonator, a waveguide, a source of microwave energy and a water load device. The constituent units or modular components of the power head are arranged in a sandwich like manner to form... | 10/14/1986 |
| 4593259 | Waveguide load having reflecting structure for diverting microwaves into absorbing fluid A calorimetric load for very high microwave power at very high frequencies is formed by a metallic, cylindrical chamber into which the wave-guide carrying the power opens. Inside the metallic cylinder is a coaxial dielectric cylinder, with a space between... | 06/03/1986 |
| 4516088 | Power absorbing termination for a waveguide transmission line A power absorbing termination for a waveguide transmission line comprised of a waveguide section containing a fluid carrying dielectric taper which is inclined relative to the waveguide axis so that the point end of the taper lies against the guidewall of... | 05/07/1985 |
| 4382239 | Waveguide cooling system An improved system is described for cooling high power waveguides by the use of cooling ducts extending along the waveguide, which minimizes hot spots at the flanges where waveguide sections are connected together. The cooling duct (24) extends along subs... | 05/03/1983 |
| 4286238 | Harmonic filtering device for radio transmitter A harmonic filtering device placed in a high frequency line connecting a radio transmitter to its load with at least one cell in parallel on the line, constituted by an anti-resonant circuit (at the transmission frequency of the transmitter) in series wit... | 08/25/1981 |
| 4039854 | Liquid rheostat system Liquid rheostat system especially a water rheostat, employing the principle wherein electrical energy may be dissipated in the form of heat, by passing the electrical current through a liquid resistor or electrolyte, and wherein the apparatus is reasonabl... | 08/02/1977 |
| 3983356 | End load for microwave ovens An end load for a microwave oven for efficiently attenuating microwave energy escaping from an oven access port. The end load has a circular configuration and consists of an inner cylindrical member and a concentrically mounted, outer conductive member. T... | 09/28/1976 |
| 3940719 | Microwave waveguide dissipative load comprising fluid cooled lossy waveguide section An electromagnetic energy dissipative load or attenuator is provided having a lossy section of waveguide transmission line of sufficient length to provide substantial loss and a transition section for adaption to other waveguide configurations. The transm... | 02/24/1976 |
