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 |
| 7535428 | Flat-aperture waveguide sidewall-emitting twist-reflector antenna A flat aperture waveguide sidewall-emitting twist-reflector (FAWSET) antenna, having an E-plane sectoral flare having a depth merely the H-plane width of the waveguide. Extending the E-plane sectoral flare is a twist-reflector tilted from one sidewall of the E-plane... | 05/19/2009 |
| 7403166 | Communication system with broadband antenna A communication system including an antenna array with feed network coupled to communication electronics. In one example, a communication subsystem comprises a plurality of antennas each adapted to receive an information signal and a plurality of orthomode transduce... | 07/22/2008 |
| 7365696 | Multitransmitter RF rotary joint free weather radar system A multitransmitter RF rotary joint free weather radar system is used to transmit two transmitted waves toward an object and to receive two reflected waves from the object. The system incorporates an antenna pedestal having a platform support and a platform. The plat... | 04/29/2008 |
| 7327323 | Communication apparatus, method of transmission and antenna apparatus Communications apparatus has a plurality of nodes each of which is capable of communicating with plural other nodes via point-to-point wireless transmission links between the nodes. At least one of the nodes has at least one antenna that is steerable in azimuth. The... | 02/05/2008 |
| 7283094 | Dual band antenna assembly and method for designing the same A dual band antenna assembly includes a radiating metal strip fabricated on a baseboard. The radiating metal strip includes a winding strip section having a heading end and a tail end, a connected strip section having one connecting end coupled integrally to the tai... | 10/16/2007 |
| 7230581 | Nomadic storable satellite antenna system An elevation mechanism for a satellite antenna system allows the antenna to be moved between a deployed position and a stowed position. The elevation mechanism includes a lift bar driven by a motor having one end pivotally connected to the back of the antenna and a ... | 06/12/2007 |
| 7205953 | Directional antenna array A directional antenna array is provided that includes a driven element and a first parasitic element separated from the driven element with the first parasitic element and/or the driven element having a width that is greater than about one-half a percent (0.5%) of a... | 04/17/2007 |
| 7196665 | Antenna device An antenna device has a first antenna element supporting a low frequency band and a second antenna element supporting a high frequency band. The first antenna element and the second antenna element are disposed so as to face to each other, on the wiring board of a r... | 03/27/2007 |
| 7129903 | Method and apparatus for mounting a rotating reflector antenna to minimize swept arc An apparatus and method for forming a cassegrain reflector antenna that allows an extended length feed horn to be employed without increasing an overall depth of the antenna. This enables the swept diameter of the antenna to be maintained at a minimum comparable to ... | 10/31/2006 |
| 7119753 | Slot array antenna An object of the invention is to provide a slot array antenna in which unstable factors for contact of an adjustment portion comprising a slot waveguide and a waveguide holder are removed, a number of parts is decreased to save weight, and assembly is simplified. Ac... | 10/10/2006 |
| 7106259 | Planar inverted-F antenna A planar inverted-F antenna includes a ground element, a shorting element, a radiating element, and a feeding element. The shorting element extends upwardly from the ground element. The radiating element is disposed above the ground element, and extends transversely... | 09/12/2006 |
| 7102581 | Multiband waveguide reflector antenna feed A multiband waveguide reflector antenna feed comprises waveguide feeds in a concentric architecture. A waveguide feed is located in the center and coaxial waveguide feeds are disposed around the center feed. The waveguide feeds may be all-metallic with the center fe... | 09/05/2006 |
| 7084834 | Mounting assembly for sectorized antennas A mounting assembly for sectorized antennas comprising: a plurality of vertical mounting columns, each of said plurality of vertical mounting columns being configured to support an antenna; and a first horizontal bracket having a top surface and a perimeter, said pe... | 08/01/2006 |
| 7079082 | Coplanar waveguide continuous transverse stub (CPW-CTS) antenna for wireless communications An improved continuous transverse stub (CTS) antenna has coplanar waveguide (CPW) feed elements spaced apart aligned in parallel and mounted perpendicular to a planar substrate base made of a low dielectric material. A continuous transverse stub extends perpendicula... | 07/18/2006 |
| 7042409 | Method and apparatus for mounting a rotating reflector antenna to minimize swept arc An apparatus and method for mounting a rotatable reflector antenna system on an outer surface of an aircraft which minimizes a swept arc of a main reflector. This allows the effective frontal area of the main reflector to be reduced such that a radome with a smaller... | 05/09/2006 |
| 6992638 | High gain, steerable multiple beam antenna system A multi-beam antenna system is described herein that can be used in microwave frequency applications between 1 GHz and 100 GHz. The multi-beam antenna system covers four 90° sectors for full 360° coverage. Each 90° sector is covered with at least 1 narrow steerab... | 01/31/2006 |
| 6950075 | GPS antenna for submarine towed buoy An apparatus including a gimbal and an antenna with a hollowed frustum having a closed end and an open end. The antenna includes a feed stem at the closed end extending as an internal rod into the hollowed frustum. The opposite end of the rod connects to a receiver ... | 09/27/2005 |
| 6950073 | Communication system with broadband antenna A communication system including an antenna array with feed network coupled to communication electronics. In one example, a communication subsystem comprises a plurality of antennas each adapted to receive an information signal and a plurality of orthomode transduce... | 09/27/2005 |
| 6933902 | Dual-frequency antenna The present invention discloses a dual-frequency antenna, wherein a coplanar wave guide wire is printed onto a dielectric substrate, so that an end of the coplanar wave guide wire can be used as a signal input end, and a ground metal surface is printed onto the same... | 08/23/2005 |
| 6870512 | Antenna device for conducting two-axial scanning of an azimuth and elevation For the purpose of obtaining a mechanical drive reflecting mirror antenna device which is downsized and low in attitude, enables wide-angle scanning, and is high in performance, there are provided a main reflection mirror 1, a sub-reflection mirror 2, ... | 03/22/2005 |
| 6779730 | Perforated antenna for an integrated circuit card, and an integrated circuit card including such an antenna An antenna for an integrated circuit card includes a conductive track (2) forming at least one turn and having ends (3) comprising conductive layers forming connection terminals (4), the connection terminals (4) being perforated. An integ... | 08/24/2004 |
| 6735849 | Method of making dual band microstrip antenna A dual band microstrip antenna (1) made by a method of the present invention includes a dielectric substrate (11), a ground plane layer (10) attached to a bottom surface (111) of the substrate, a first and second conductive patches (21... | 05/18/2004 |
| 6646620 | Antenna scanner A wave guide scanner assembly having an oscillating support for a scanning antenna which is driven by an assembly having no contacting components. The scanner assembly is particularly useful for motor vehicular collision warning systems. The drive assembl... | 11/11/2003 |
| 6556165 | Antenna apparatus and waveguide rotary coupler An AC power source applies power to a primary coil that is provided in a fixed part. An AC current flowing through the primary coil induces electromotive force in a secondary coil that is provided in a movable part. The AC electromotive force induced in t... | 04/29/2003 |
| 6501426 | Wide scan angle circularly polarized array An array of dual trough radiator elements including orthogonally crossed trough waveguide cavities and RF feed members of predetermined adjustable length extending across the cavities from one radiator element to its neighbor, where the feed members are s... | 12/31/2002 |
| 6480165 | Multibeam antenna for establishing individual communication links with satellites positioned in close angular proximity to each other Antennas and multiplexer structures are provided for establishing individual communication links with satellites that are located at geostationary positions in close angular proximity to one another. The antenna includes individual wave-guides where at le... | 11/12/2002 |
| 6313798 | Broadband microstrip antenna having a microstrip feedline trough formed in a radiating element A microstrip antenna includes a ground plane element and a radiating element. An elongated trough is formed generally in the middle of the radiating element so as to divide the radiating element into two generally equally-sized portions, and in a manner t... | 11/06/2001 |
| 6157347 | Electronically scanned semiconductor antenna An electronically scanned antenna that is manufactured using semiconductor material and device fabrication technology. The antenna has a semiconductor substrate having a plurality of stubs projecting from one surface. The semiconductor substrate may be si... | 12/05/2000 |
| 6064349 | Electronically scanned semiconductor antenna An electronically scanned antenna that is manufactured using semiconductor material and device fabrication technology. The antenna has a semiconductor substrate having a plurality of stubs projecting from one surface. The semiconductor substrate may be si... | 05/16/2000 |
| 5905472 | Microwave antenna having wide angle scanning capability A planar array antenna having a switching matrix that couples an RF signal to two distributed ferrite scanning line feeds that feed a planar continuous transverse stub array antenna. The scanning line feeds couple RF energy to the antenna from opposite si... | 05/18/1999 |
| 5748156 | High-performance antenna structure An antenna structure has a rotatable dipole array constituting a driven antenna element, a cup mounted around the dipole, a first conductor connected to and extending from the antenna, and a first dielectric mounted around the first conductor. A second co... | 05/05/1998 |
| 5255003 | Multiple-frequency microwave feed assembly A multiple-frequency feed assembly for an antenna system having two coaxial cavities, with a smaller, high-frequency cavity mounted coaxially within a larger, low-frequency cavity. A separate rotatable probe is mounted within each cavity. The smaller cavi... | 10/19/1993 |
| 5021798 | Antenna with positionable reflector A horn type microwave antenna includes a main reflector and sub-reflector that are supported in proper spaced relationship by flexidigit robotic manipulators, multisection arms that are capable of positional changes, whereby the supports may be changed in... | 06/04/1991 |
| 4994816 | Portable antenna apparatus A portable antenna apparatus comprises a foldable leg unit. This leg unit is provided with at least three legs each having a first jack, and a mount whose angle of rotation is adjustable. A foldable support unit, which has a plurality of beam members comb... | 02/19/1991 |
| 4903037 | Dual frequency microwave feed assembly A dual frequency feed assembly for antenna systems employing a pair of rotatably mounted probes each in respective coaxial cavities. The smaller cavity is supported by the rotating means for the larger probe and the smaller probe rotates with the larger p... | 02/20/1990 |
| 4876553 | Apparatus for adjusting the polarization plane of an antenna A device for adjusting the polarization plane in an antenna feed system is disclosed. The rotary device uses flexible waveguides which permits rotation of the polarization plane over a large angular range.... | 10/24/1989 |
| 4873534 | Hybrid mode feed horn having funnel-shaped horn flange with grooved conical inner surface A hybrid-mode feed horn for feeding a reflector from the primary focus has a flange provided with grooves in an inner funnel-shaped surface thereof. The horn flange is formed to enable illumination of deep reflectors with a high aperture efficiency, low s... | 10/10/1989 |
| 4868574 | Electronically scanned radar system An electronically scanned radar system has a serpentine antenna, with at least two ports. The antenna is physically rotated. Each port has a mixer, transmitter and local oscillator feeding signals to it, the signals of the transmitter and oscillator being... | 09/19/1989 |
| 4786913 | Universal waveguide joint, flexible coupler, and arrangement for a surveillance radar antenna Universal waveguide joint, provided with at least two waveguide segments (1-7) slidable over each other, whereby one end of at least one of the waveguide segments (1-7) has a convex surface and the end of another respective waveguide segment, slidable ove... | 11/22/1988 |
| 4774520 | Primary microwave source for a conical scanning antenna and an antenna containing it A microwave primary source with a phase conical scan having a conical horn containing an obstacle which gives rise to a wave that propagates in the TE21 mode in quadrature with the TE11 fundamental mode in the opening of the horn; th... | 09/27/1988 |
