Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7948444 | Method and system of communications for high data rate transmission In a method and system for configuring an antenna for line of sight (LOS) communication procedures are implemented for providing low error rates at moderate transmission power. The antenna is configured for a particular communications distance over line of sight lin... | 05/24/2011 |
| 7932870 | Interlaced multiband antenna arrays Antenna arrays which can work simultaneously in various frequency bands thanks to the physical disposition of the elements which constitute them, and also the multiband behavior of some elements situated strategically in the array. The configuration of the array is ... | 04/26/2011 |
| 7868843 | Slim multi-band antenna array for cellular base stations This invention is in the field of base station antennas for wireless communications. The present invention refers to a slim multi-band antenna array for cellular base stations, which provides a reduced width of the base station antenna and minimizes the environmenta... | 01/11/2011 |
| 7808443 | Antenna arrangement with interleaved antenna elements The present invention relates to an antenna arrangement connectable to a transceiver for transmitting and receiving RF signals in at least two separate frequency bands. The antenna arrangement has at least two sets of antenna elements arranged on a reflector, and th... | 10/05/2010 |
| 7710346 | Heptagonal antenna array system An antenna system includes a heptagonal antenna array having one center antenna element and seven circumferentially surrounding antenna elements offering improved near and far sidelobe rejection, which is well suited for mechanically-gimbaled and time delayed electr... | 05/04/2010 |
| 7696945 | Scannable sparse antenna array A sparse array antenna is disclosed. The antenna comprises series-fed antenna array columns tuned to a respective transmit and receive frequency. The transmitting and receiving radiation elements are formed with a given distance between each transmitting radiator el... | 04/13/2010 |
| 7688275 | Multimode antenna structure A multimode antenna structure is provided for transmitting and receiving electromagnetic signals in a communications device. The communications device includes circuitry for processing signals communicated to and from the antenna structure. The antenna structure inc... | 03/30/2010 |
| 7646354 | Antennae device for reading electronic labels and system comprising same An antennae device for reading electronic labels includes passive antennae arranged in the form of an array comprising L lines and C columns. The antennae are located in the array by co-ordinates (i, j), i ranging from 1 to L, j ranging from 1 to C. Each antenna (i,... | 01/12/2010 |
| 7642986 | Range limited antenna Range limited antenna includes at least two sets of antenna elements and an RF signal processing network connected to each set of antenna elements. The network has a function, F(Ξ,x)=ΦA(x)−ΦB(x)+ΦC(x)−ΦD(x) . . . ... | 01/05/2010 |
| 7616169 | Electrically controlled broadband group antenna, antenna element suitable for incorporation in such a group antenna, and antenna module comprising several antenna elements An electrically controlled group antenna including an antenna element suitable for incorporation in such a group antenna and an antenna module including several such antenna elements. The antenna elements include a rotationally-symmetrical body tapering towards one ... | 11/10/2009 |
| 7557768 | Interlaced multiband antenna arrays Antenna arrays which can work simultaneously in various frequency bands thanks to the physical disposition of the elements which constitute them, and also the multiband behaviour of some elements situated strategically in the array. The configuration of the array is... | 07/07/2009 |
| 7538740 | Multiple-element antenna array for communication network An antenna array includes four closely spaced, linearly arranged antenna columns. At least two of the columns, e.g., the center two columns, are dual-polarized. Spacing between neighboring columns is about ½λ, where λ is the free space wavelength at the network c... | 05/26/2009 |
| 7482992 | Multiple access wireless communications antenna apparatus A multiple access wireless communications architecture provides selective, simultaneous communications with wireless devices located in different sections of a spatial area around a communications apparatus referred to as “sectors”. This includes communications ... | 01/27/2009 |
| 7479930 | Antenna array method and apparatus A ground plane apparatus (200 ) has a plurality of substantially planar ground plane surfaces (201 ) that are connected, arranged, and configured to substantially form a pyramid-shaped object. A plurality of radiating antennas (202 ) are then pr... | 01/20/2009 |
| 7456800 | Receiving antenna system comprising several active antennae A receiver antenna system of broad bandwidth including a plurality of active, vertical individual antennae, which have an electrically-active antenna height adapted to the respective received frequency range, is minimized with regard to the mutual electromagnetic co... | 11/25/2008 |
| 7385563 | Multiple antenna array with high isolation A high-isolation multiple in, multiple out (MIMO) antenna array includes, in one configuration, a ground plane, and a plurality of antenna transmitting/receiving elements arranged near the periphery of the ground plane, wherein each of the antenna transmitting/recei... | 06/10/2008 |
| 7372402 | Method for enhancing the measuring accuracy in an antenna array The invention refers to a method and a system for enhancing the measuring accuracy in an antenna array (1), where the method comprises the steps of; a) receiving analog signals on all antenna elements (2) at a first time t1; producing first ... | 05/13/2008 |
| 7362282 | OFDM transmission system With the objective of reducing noise components to thereby avoid degradation of receiving characteristics, by making an antenna arrangement having taken into consideration transfer functions for radio wave propagation in an MIMO system, the present invention provide... | 04/22/2008 |
| 7348929 | Phased array antenna with subarray lattices forming substantially rectangular aperture A phased array antenna includes a plurality of subarray lattices connected together in a linear configuration and forming a substantially rectangular aperture. Each subarray lattice is clocked progressively to obtain an aperiodic aperture and reduce grating lobes. | 03/25/2008 |
| 7348930 | Method and apparatus for a radio transceiver A wireless radio transceiver which reduces interference between antennas positioned in substantially close proximity is disclosed. The exemplary radio transceiver comprises at least two radios, at least one antenna interfacing with each of the radios, at least one a... | 03/25/2008 |
| 7339521 | Analytical instruments using a pseudorandom array of sources, such as a micro-machined mass spectrometer or monochromator Novel methods and structures are disclosed herein which employ pseudorandom sequences to spatially arrange multiple sources in a pseudorandom source array. The pseudorandom source array can replace the single source in analytical instruments relying on spatial separ... | 03/04/2008 |
| 7339542 | Ultra-broadband antenna system combining an asymmetrical dipole and a biconical dipole to form a monopole An ultra-broadband antenna system is disclosed. The antenna system is a single tubular antenna structure comprising an asymmetrical dipole fed with a biconical dipole. The biconical dipole covers the high frequency spectrum, while the asymmetrical dipole covers inte... | 03/04/2008 |
| 7333055 | System and method for microwave imaging using an interleaved pattern in a programmable reflector array An antenna array for use within a microwave imaging system includes a plurality of reflecting antenna elements, each capable of being programmed with respective phase-shifts in a first pattern to direct a first beam of microwave radiation towards a first target, and... | 02/19/2008 |
| 7319429 | Partially reflective surface antenna The present invention relates to a partially reflective surface antenna and, more particularly, to a partially reflective surface antenna including a reflective board composed of arrays of microstrip antennas, and has advantages of low side lobe and high gain. It co... | 01/15/2008 |
| 7315276 | Beam compression radar A concept is described for broadening the beam of a phased array radar antenna to provide continuous illumination of all radar targets within the search space, and this beam is compressed upon reception to realize the angular resolution that is possible with the ant... | 01/01/2008 |
| 7298228 | Single-pole multi-throw switch having low parasitic reactance, and an antenna incorporating the same A switch arrangement comprises a plurality of MEMS switches arranged on a substrate about a central point, each MEMS switch being disposed on a common imaginary circle centered on the central point. Additionally, and each MEMS switch is preferably spaced equidistant... | 11/20/2007 |
| 7292202 | Range limited antenna Range limited antenna includes first and second pair of antenna elements, and an RF signal processing network connected to both pair of antenna elements. The network has a function, F(Ξ,x)≈ΦA(x)−ΦB(x), where x is a signal, ΦA... | 11/06/2007 |
| 7292198 | System and method for an omnidirectional planar antenna apparatus with selectable elements A system and method for a wireless link to a remote receiver includes a communication device for generating RF and a planar antenna apparatus for transmitting the RF. The planar antenna apparatus includes selectable antenna elements, each of which has gain and a dir... | 11/06/2007 |
| 7276990 | Single-pole multi-throw switch having low parasitic reactance, and an antenna incorporating the same A switch arrangement comprises a plurality of MEMS switches arranged on a substrate about, and close to, a central point, each MEMS switch being disposed on a common imaginary circle centered on the central point. Additionally, and each MEMS switch is preferably spa... | 10/02/2007 |
| 7263386 | High gain omnidirectional antenna and related method An antenna system which is capable of having omnidirectional transmitting and receiving capabilities is disclosed. The antenna system includes a plurality of directional antennas coupled to a transceiver, wherein the antennas are configured to have their main lobes ... | 08/28/2007 |
| 7257370 | Method and apparatus for mitigating interference from terrestrial broadcasts sharing the same channel with satellite broadcasts using an antenna with posterior sidelobes An apparatus for simultaneously receiving a first signal from a non-terrestrial source and a second signal from a terrestrial source on the same or overlapping channels using a receive antenna with posteriorly-directed sidelobes is disclosed. The apparatus comprises... | 08/14/2007 |
| 7253699 | RF MEMS switch with integrated impedance matching structure An impedance matching structure for a RF MEMS switch having at least one closeable RF contact in an RF line, the impedance matching structure comprising a protuberance in the RF line immediately adjacent the RF contact that forms one element of a capacitor, the othe... | 08/07/2007 |
| 7250918 | Interlaced multiband antenna arrays Antenna arrays which can work simultaneously in various frequency bands thanks to the physical disposition of the elements which constitute them, and also the multiband behaviour of some elements situated strategically in the array. The configuration of the array is... | 07/31/2007 |
| 7245269 | Adaptive beam forming antenna system using a tunable impedance surface A method of and apparatus for beam steering. A feed horn is arranged so that the feed horn illuminates a tunable impedance surface comprising a plurality of individually tunable resonator cells, each resonator element having a reactance tunable by a tuning element a... | 07/17/2007 |
| 7236133 | Antenna system A compact and low-lying antenna system for receiving a radio wave includes a ground plate, a first crooked monopole antenna having a horizontal portion extending in parallel with the ground plate and a vertical portion extending vertically to the ground plate in suc... | 06/26/2007 |
| 7233217 | Microstrip phase shifter A phase shifter adjusts the phase between two segments of an RF feed line that are fed with the phase shifter. Specifically, the phase shifter adjusts the phase between two signals in RF feed line segments by changing the electrical path lengths that RF energy trave... | 06/19/2007 |
| 7230579 | Directional dual frequency antenna arrangement Consistent with an example embodiment, using two simple antennas with different frequencies of operation combined into an antenna arrangement a directional radiation pattern is obtained for both frequencies of operation. This is achieved by placing the antennas such... | 06/12/2007 |
| 7221962 | Telecommunications radio system for mobile communication services The invention relates to a telecommunications radio system for mobile communication services. More specifically, the invention relates to covering large sectorized areas for mobile communication services. ... | 05/22/2007 |
| 7183926 | Adaptable bandwidth RFID tags RFID tags, tag circuits, and methods adapting the reception bandwidth. A tag has a decoder for decoding a first received wireless signal subject to a reception bandwidth setting. The tag also has a selector switch for transitioning to a different setting, such as by... | 02/27/2007 |
| 7174142 | Receiver having a built-in antenna and method of impedance-matching for the same A receiver includes an antenna, an impedance-matching circuit, a receive circuit, a control circuit, a digital-to-analog (D/A) converter, a mode switch, and an EEPROM. The impedance-matching circuit includes a variable-capacitance diode. The control circuit determin... | 02/06/2007 |
