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Astakhov
Andrey Astakhov, Moscow RU
| Patent application number | Description | Published |
|---|---|---|
| 20090140930 | Patch Antenna with Capacitive Elements - Disclosed is a micropatch antenna comprising a radiating element and a ground plane separated by an air gap. Small size, light weight, wide bandwidth, and wide directional pattern are achieved without the introduction of a high-permittivity dielectric substrate. Capacitive elements are configured along the perimeter of at least one of the radiating element and ground plane. Capacitive elements may comprise extended continuous structures or a series of localized structures. The geometry of the radiating element, ground plane, and capacitive elements may be varied to suit specific applications, such as linearly-polarized or circularly-polarized electromagnetic radiation. | 06-04-2009 |
| 20090273522 | Broadband Micropatch Antenna System with Reduced Sensitivity to Multipath Reception - A micropatch antenna system with simultaneous high bandwidth and low sensitivity to multipath radiation is achieved by positioning a radiating element within a cavity in a ground plane. Bandwidth and sensitivity to multipath radiation may be varied by varying the height of the radiating element above the bottom of the cavity and above the top of the ground plane. The electromagnetic and physical characteristics of the antenna system may be further controlled by introducing dielectric solids or wave-slowing structures between the bottom of the cavity and the radiating element. A dual-band micropatch antenna system with simultaneous high bandwidth and low sensitivity to multipath radiation may be similarly configured by stacking a second radiating element on top of the first radiating element. | 11-05-2009 |
| 20100073239 | Compact Circularly-Polarized Antenna with Expanded Frequency Bandwidth - Disclosed is a circularly-polarized antenna comprising a flat conducting ground plane, a radiator, and an excitation system disposed between the radiator and the ground plane. The radiator comprises a plurality of conducting segments separated from each other by a first dielectric medium and separated from the ground plane by a second dielectric medium. The plurality of conducting segments are symmetrically disposed about an antenna axis of symmetry orthogonal to the ground plane. The excitation system comprises a flat conducting exciter patch and four excitation sources with phase differences of 0, 90, 180, and 270 degrees. The excitation sources are generated on two orthogonal printed circuit boards. | 03-25-2010 |
| 20110012808 | Broadband Convex Ground Planes for Multipath Rejection - A ground plane for reducing multipath reception comprises a convex conducting surface and an array of conducting elements disposed on at least a portion of the convex conducting surface. Embodiments of the convex conducting surface include a portion of a sphere and a sphere. Each conducting element comprises an elongated body structure having a transverse dimension and a length, wherein the transverse dimension is substantially less than the length. The cross-section of the elongated body structure can have various user-specified shapes. Each conducting element can further comprise a tip structure. The azimuth spacings, lengths, and surface densities of the conducting elements can be functions of meridian angle. An antenna can be mounted directly on the conducting convex surface or on a conducting or dielectric support structure mounted on the conducting convex surface. System components, such as a navigation receiver, can be mounted inside the conducting convex surface. | 01-20-2011 |
| 20110115676 | Compact Multipath-Resistant Antenna System with Integrated Navigation Receiver - A patch antenna system with improved multipath resistance includes a top antenna assembly and a bottom antenna assembly. Each antenna assembly includes a radiator patch and a ground plane separated by a dielectric medium. The radiator patch on the top antenna assembly is excited by an exciter and an excitation circuit. The bottom antenna assembly is electromagnetically coupled to the top antenna assembly. The resonant frequency of the bottom antenna assembly is approximately equal to the resonant frequency of the top antenna assembly. Electromagnetic fields induced in the bottom antenna assembly are in opposite phase to the electromagnetic fields excited in the top antenna assembly. Amplitudes of electromagnetic fields induced in the bottom antenna assembly are subtracted from amplitudes of electromagnetic fields excited in the top antenna assembly, and multipath signals are suppressed. Single band and dual band antenna systems suitable for global navigation satellite systems can be implemented. | 05-19-2011 |
Andrey V. Astakhov, Moscow RU
| Patent application number | Description | Published |
|---|---|---|
| 20120056787 | Patch Antenna with Capacitive Radiating Patch - A patch antenna includes a capacitive radiating patch, a ground plane, and vertical coupling elements electrically connected to defined portions of the capacitive radiating patch and the ground plane. The capacitive radiating patch includes an array of conductive segments along the periphery and within the interior of the capacitive radiating patch. Capacitors are electrically connected to specific conductive segments in a defined pattern. Vertical coupling elements electrically connect specific conductive segments along the periphery of the capacitive radiating patch to the ground plane. Vertical coupling elements can be conductors or defined combinations of resistors, inductors, and capacitors. Various embodiments of the patch antenna are configured for linear polarization and circular polarization. Relative to a conventional patch antenna of a similar size, a patch antenna with a capacitive radiating patch has a broader operational bandwidth and a broader radiation pattern in the forward hemisphere. | 03-08-2012 |
Georgy Astakhov, Wurzburg DE
| Patent application number | Description | Published |
|---|---|---|
| 20080316576 | Method and Device for Polarization Conversion Using Quantum Dots - A novel and efficient method for polarization conversion, particularly from linear polarization to circular polarization, and, importantly, vice versa, is obtained using shapeanisotropic self-assembled quantum dots, which, having the advantage of extremely small size (nanometer scale), may be readily incorporated into photonic crystals and/or other optical components. Such devices also have the advantage of working in the absence of an applied magnetic field. Such devices also, when a voltage bias is applied, can be used to manipulate electron spin by manipulating light polarization in the same circuit, and vice versa. This permits a high degree of control for either or both of these in spintronics and/or optical devices, the biased quantum dot being used as a nanometer scale electro-optic modulator. Components utilizing the method and/or devices may be used as part of highly compact optical computing networks and/or spintronics systems for e.g., information processing, quantum computation, holography, and data recording. | 12-25-2008 |
Pavel Astakhov, Moscow RU
| Patent application number | Description | Published |
|---|---|---|
| 20090187764 | ELECTRONIC CERTIFICATION, IDENTIFICATION AND COMMUNICATION UTILIZING ENCRYPTED GRAPHICAL IMAGES - A system and method for electronic certification, identification and communication. According to an exemplary implementation, these processes are performed by using an electronic graphic image with encrypted information concerning the certified object. The object is accompanied with an application specific image hereafter called Electronic Virtual Stamp (EV-Stamp) having embedded and encrypted control information (keys and electronic signatures, identifiers of senders and receivers, date and other transaction related information) as well as any message to be passed. Each transaction of the EV-Stamp is monitored by a specialized Web server that maintains the records of all issued electronic stamps, all subscribed users, all involved financial transactions, and all registered assets. It is also possible to use any other graphical images to reflect on various possible applications such as exchange of the EV-Stamp for a good/service. | 07-23-2009 |