Grebennikov
Andrei Grebennikov, Linz AT
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20100093293 | RF Circuit with Improved Antenna Matching - In one embodiment, RF front-end circuit includes a tunable matching network having an input coupled to an RF interface port, a directional coupler with a first connection coupled to an RF input of a mixer, a second connection coupled to an RF signal generation port, and a third connection coupled to an output of the tunable matching network. The directional coupler is configured to direct a signal from the RF signal generation port to the tunable matching network and to direct a signal from the tunable matching network port to the RF port of the mixer. The RF front-end circuit also has a tunable matching network control unit coupled to the tunable matching network. The control unit is configured to optimize an impedance match between the RF interface port and the output of the tunable matching network. | 04-15-2010 |
20120229330 | RF Circuit with Improved Antenna Matching - In one embodiment, RF front-end circuit includes a tunable matching network having an input coupled to an RF interface port, a directional coupler with a first connection coupled to an RF input of a mixer, a second connection coupled to an RF signal generation port, and a third connection coupled to an output of the tunable matching network. The directional coupler is configured to direct a signal from the RF signal generation port to the tunable matching network and to direct a signal from the tunable matching network port to the RF port of the mixer. The RF front-end circuit also has a tunable matching network control unit coupled to the tunable matching network. The control unit is configured to optimize an impedance match between the RF interface port and the output of the tunable matching network. | 09-13-2012 |
Andrei Grebennikov, Dublin IE
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20100060353 | Power amplifier linearization using RF feedback - The power amplifier mainly includes a main amplifier, two splitters, one combiner, one subtracter, two phase shifters, one attenuator and one error amplifier. The splitters, subtracter and combiner are designed in the form of 90-degree or quadrature hybrid couplers. A quadrature hybrid can be implemented with any lumped or transmission-line elements and has an important advantage compared to the in-phase splitter that at equal values of reflection coefficients from loads connected to the in phase and 90° phase shift terminals, the reflection wave is lacking at the main input terminal and, consequently, the input voltage standing wave ratio of a quadrature hybrid does not depend on the equal load mismatch level. | 03-11-2010 |
Andrei Grebennikov, Munchen DE
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20090111401 | TRANSMITTER ARRANGEMENT - A transmitter arrangement includes a first amplifier arrangement and a second amplifier arrangement. The first amplifier arrangement includes a first amplification path and a second amplification path. The first amplification path is adapted to amplify signals comprising a data content according to a first communication standard. The second amplification path is adapted to amplify signals comprising a data content according to a second communication standard. The second amplifier arrangement further includes a first and second amplification path sharing at least one common amplifier stage that is adapted to amplify signals having a data content according at least to the second communication standard. | 04-30-2009 |
Evgeny P. Grebennikov, Moscow RU
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20110166333 | NANOCOMPOSITE MATERIAL - The invention relates to nanotechnology and is directed at nanocomposite materials with effectively controllable optical properties which can be used in non-linear optics, information engineering, for designing optical memory means etc. The inventive nanocomposite material comprises nanoparticles, intermediate bonding molecule particles which modify the space configuration when they are exposed to an external light action, and bondable molecule particles which exhibit the optical properties near nanoparticles, wherein the nanoparticles, intermediate bonding molecules and bondable molecules are connected in series so as to form a three-dimensional cluster structure. Moreover, the intermediate bonding molecule particles which modify the space configuration when they are exposed to an external light action can contain additional inclusions in the form of functional substituents which enhance the bonding properties thereof. | 07-07-2011 |
20110260347 | METHOD FOR PRODUCING LIPOSOMAL DRUGS AND A DEVICE FOR PRODUCING A LIPOSOME - The essence of the invention is that an aqueous medium is mixed with a lipid component (lipid solution in an organic solvent) by the ejecting introduction (suction) of the lipid component (lipid solution in an organic solvent) into an ejector mixing chamber in the form of a de Laval nozzle by means of the energy from a pressurized jet of the aqueous medium flowing out of the inlet nozzle of the ejector, which jet creates a pressure drop in the convergent part (confuser) of the mixing chamber, wherein an aerosol stream of liposome is formed at the outlet of the divergent part (diffuser) of the mixing chamber. | 10-27-2011 |
20140205694 | Method for Producing Liposomal Drugs and a Device for Producing a Liposome - The essence of the invention is that an aqueous medium is mixed with a lipid component (lipid solution in an organic solvent) by the ejecting introduction (suction) of the lipid component (lipid solution in an organic solvent) into an ejector mixing chamber in the form of a de Laval nozzle by means of the energy from a pressurized jet of the aqueous medium flowing out of the inlet nozzle of the ejector, which jet creates a pressure drop in the convergent part (confuser) of the mixing chamber, wherein an aerosol stream of liposome is formed at the outlet of the divergent part (diffuser) of the mixing chamber. | 07-24-2014 |
Nikolay A. Grebennikov, Moscow RU
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20140095866 | SYSTEM AND METHOD FOR VERIFICATION OF DIGITAL CERTIFICATES - Analysis of authenticity digital certificates includes. Initial information pertaining to digital certificates is collected from diverse information sources. For each of the digital certificates the initial information includes intrinsic parameter data from among contents of the digital certificate and extrinsic parameter data pertaining to the digital certificate and comprising static data not contained in the contents of the digital certificate. Selected parameter data is stored and analyzed to determine a measure of suspiciousness for each of the digital certificates. If necessary, circumstantial data based on actual usage of one or more of the digital certificates are collected. The initial data and supplemental data are compared against a set of decision criteria that define fraudulent activity, and a determination of authenticity of each of the digital certificates is made. | 04-03-2014 |