Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8184063 | Balanced dipole antenna A balanced dipole antenna, comprising: a left dipole arm having a center end, a right dipole arm having a center end, a coaxial cable having an outer conductor and a single inner conductor and a top end electrically located between the center ends of the left and ri... | 05/22/2012 |
| 7724201 | Compact diversity antenna system The present invention provides a compact antenna system having multiple antennas exhibiting polarization and pattern diversity. The system comprises at least two antennas which may have different polarizations, operatively coupled to a passive element which operates... | 05/25/2010 |
| 7629939 | Broadband dual polarized base station antenna A dual polarized broadband base station antenna for wireless communication systems is disclosed. The present invention employs a dual polarized boxed arrangement radiation element with high isolation between polarization channels. Plural radiating elements project o... | 12/08/2009 |
| 7586457 | Balanced dipole antenna A balanced dipole antenna has a coaxial cable connected between a load or source and the left and right dipole arms to substantially eliminate common mode current and radiative coupling between the coaxial cable and the left and right dipole arms. The connection bet... | 09/08/2009 |
| 7324057 | Low wind load parabolic dish antenna fed by crosspolarized printed dipoles The present invention provides a parabolic dish reflector antenna for wireless communications that is dually polarized for diversity reception purposes while causing minimal visual disturbance for use with cellular base stations and repeaters. The antenna comprises ... | 01/29/2008 |
| 7319435 | Balun for an antenna A balun used in high-power applications capable of accommodating a transmission line includes a core with a top surface and a bottom surface formed from soft iron material. At least two holes are provided through the core between the top surface and the bottom surfa... | 01/15/2008 |
| 7298345 | Dipole antenna element Described is a dipole which may includes a feed line electrically coupled to a first antenna element; a balun electrically coupled to a second antenna element; and a short assembly slidably coupled to the feed line and the balun to create a short circuit at variable... | 11/20/2007 |
| 7292649 | 3G radio A homodyne receiver is provided for receiving GSM and UMTS transmissions. The receiver may also be used for other transmission schemes. The receiver includes an electronically reconfigurable low pass filter and an off set generator for providing DC offset correction... | 11/06/2007 |
| 7280079 | Adapter device for car radio An object of the invention is to provide an adaptor device for a car radio capable of improving the receiving state. The adaptor device 20 for a car radio is connected to a vehicle-mounted antenna connection terminal 12 provided in an FM radio receiver... | 10/09/2007 |
| 7280083 | Phased array blade antenna assembly An antenna design, having two symmetrical phased array blade antenna elements which provide improved lateral target coverage with an increased effective radiated power and exhibits smooth null-free bi-directional antenna patterns. Each blade antenna element is coupl... | 10/09/2007 |
| 7271779 | Method, system and apparatus for an antenna Embodiments of the present invention provide a microstrip-coupled dipole antenna. A microstrip of the antenna may be formed on top of a printed circuit board (PCB) and coupled to a transmission line such that the microstrip is operable to transfer electromagnetic en... | 09/18/2007 |
| 7259725 | Log-periodic dipole array antenna A log-periodic dipole array antenna including a dielectric substrate, and antenna elements, symmetrical microstrip lines and baluns disposed on two corresponding surfaces of the substrate is provided. The antenna elements on each surface are connected to one side of... | 08/21/2007 |
| 7248227 | Dipole antenna Disposing an additional sleeve-shaped structure, which is also called a sleeve, on a first radiator of both resonant radiators of a dipole antenna so that a cavity is formed between the additional radiator and a second resonant radiator of the dipole antenna. An eff... | 07/24/2007 |
| 7212164 | Radio terminal device antenna and radio terminal device A radio terminal device has an antenna element, a coil, a switch, an RF circuit section and a conductive substrate. The switch is used to switch between a case where current distribution exists only in the antenna element and its vicinities and a case where the curr... | 05/01/2007 |
| 7193579 | Balanced dipole antenna A balanced dipole antenna has a coaxial cable connected between a load or source and the left and right dipole arms to substantially eliminate common mode current and radiative coupling between the coaxial cable and the left and right dipole arms. The connection bet... | 03/20/2007 |
| 7149553 | Method and system for providing power to a communications device Embodiments of the present invention relate to apparatus and methods to provide power to a communications unit. In one embodiment of the present invention, a system includes a first communications network to engage in communications with the communications unit and ... | 12/12/2006 |
| 7132778 | Surface acoustic wave modulator An acoustic wave identification transponder device, having a substrate, an electroacoustic transfer generating an acoustic wave in said substrate and a set of encoding elements disposed in a path of the acoustic wave for modifying the acoustic wave, having elements ... | 11/07/2006 |
| 7116281 | Universal dipole with adjustable length antenna elements Described is a universal dipole which may include a feed line coupled to a first fitting; a balun coupled to a second fitting; a first variable length antenna element coupled to the first fitting; a second variable length antenna element coupled to the second fittin... | 10/03/2006 |
| 7113141 | Fractal dipole antenna A dipole fractal antenna and a method of manufacturing thereof are described. The antenna includes a pair of oppositely directed radiating arms coupled to a feeding terminal and extended therefrom along a central axis in a common plane. At least a portion of each ra... | 09/26/2006 |
| 7109821 | Connections and feeds for broadband antennas The present invention relates to connecting and impedance matching a balanced electrical signal, such as that received by an antenna, with an unbalanced transmission circuit, such as that delivered to an amplifier. A planar circuit board is described that delivers s... | 09/19/2006 |
| 7075497 | Antenna array An antenna (10) having a plurality of unitary dipole antennas (12) formed by folding a stamped piece of sheet metal. Each of the unitary dipole antennas (12) are fed by two stripline feed systems (20, 22). Each of these feed systems are s... | 07/11/2006 |
| 7023909 | Systems and methods for a wireless modem assembly A RF wireless modem with an integral antenna. The antenna is a compact, horizontally-polarized, balanced, multi-element, directional antenna with integral balun, constructed on one end of a printed wire board (PWB) and radiating preferably away from the modem circui... | 04/04/2006 |
| 7012573 | Wide band antenna A wide band antenna, which has a wide frequency band so that it can be used in a wireless local area network (WLAN) and can be manufactured in a small size at a low cost, is provided. The wide band antenna includes a first antenna unit, a supply cable, a first conne... | 03/14/2006 |
| 6987483 | Effectively balanced dipole microstrip antenna A effectively balanced dipole antenna is provided comprising an unbalanced microstrip antenna having a transmission line interface and a planar balun connected to the transmission line interface of the antenna. The balun can be coplanar or multi-planar. For example,... | 01/17/2006 |
| 6982609 | System method and apparatus for a three-line balun with power amplifier bias A balun that includes a first conductor, a second conductor and a third conductor. The first conductor has a length of about one quarter wavelength of a selected center frequency. The first conductor also has a first end connected to a first balanced power amplifier... | 01/03/2006 |
| 6950077 | Antenna system for terrestrial broadcasting Provided is an antenna system for terrestrial broadcasting. The antenna system has a dipole antenna probe receiving a broadcast signal, a signal amplifier amplifying the received broadcast signal, an antenna matching unit matching impedances between the antenna prob... | 09/27/2005 |
| 6943731 | Arangements of microstrip antennas having dielectric substrates including meta-materials A slot fed microstrip patch antenna (300) includes a conducting ground plane (308), the conducting ground plane (308) including at least one slot (306). A dielectric material is disposed between the ground plane (308) and at least ... | 09/13/2005 |
| 6937204 | Plate dipole antenna A plate dipole antenna includes a pair of plates arranged in substantially the same plane or arranged in different planes, with a width to length ratio of one width unit to ten length units or greater. The plate dipole antenna may further include a gain plate. ... | 08/30/2005 |
| 6906678 | Multi-frequency printed antenna A multi-frequency printed antenna includes an insulating substrate, a feed strip, a ground strip, and a plurality of radiating and grounded conductive strips. The insulating substrate has a first surface and a second surface opposite to the first surface. The feed s... | 06/14/2005 |
| 6894648 | Antenna apparatus and a portable wireless communication apparatus using the same An antenna apparatus featuring a simple configuration and operability at a plurality of frequencies which are relatively proximate is provided. Phase shift circuits are connected respectively between feed points of a pair of antenna elements having different resonan... | 05/17/2005 |
| 6864849 | Method and apparatus for creating an EH antenna An antenna system for transmitting and receiving, in association with a radio device that develops an H-field and an E-field corresponding to a radio frequency power signal having a voltage and a current, the voltage having a phase relationship to the current. The a... | 03/08/2005 |
| 6753814 | Dipole arrangements using dielectric substrates of meta-materials The invention concerns a dipole antenna of reduced size and with improved impedance bandwidth. The antenna is preferably formed on a dielectric substrate having a plurality of regions, each having a characteristic relative permeability and permittivity. First and se... | 06/22/2004 |
| 6741219 | Parallel-feed planar high-frequency antenna The present invention provides a planar antenna having a scalable multi-dipole structure for receiving, and transmitting high-frequency signals, including a plurality of opposing layers of conducting strips disposed upon either side of an insulating (dielectric) sub... | 05/25/2004 |
| 6717555 | Antenna array An antenna (10) having a plurality of unitary dipole antennas (12) formed by folding a stamped piece of sheet metal. Each of the unitary dipole antennas (12) are fed by two stripline feed systems (20, 22). Each of these feed systems are s... | 04/06/2004 |
| 6697029 | Antenna array having air dielectric stripline feed system An antenna (10) having a plurality of unitary dipole antennas (12) formed by folding a stamped piece of sheet metal. Each of the unitary dipole antennas (12) are fed by two stripline feed systems (20, 22). Each of these feed systems are separated above an... | 02/24/2004 |
| 6677914 | Tunable antenna system An antenna system with at least one tunable dipole element with a length adjustable conductive member disposed therein that enables the antenna to be used over a wide range of frequencies. The element is made of two longitudinally aligned, hollow support ... | 01/13/2004 |
| 6664934 | Radio antenna matching circuit Matching circuit for radio antenna that functions on a two-frequency band which are spaced approximately at a distance of one octave, wherein the upper band is broad. For instance, the first frequency band may be 890-940 MHz and the other band 1710-2200 M... | 12/16/2003 |
| 6657601 | Metrology antenna system utilizing two-port, sleeve dipole and non-radiating balancing network The present invention provides a metrology antenna system that combines a sleeve dipole antenna having two coaxial input ports with a balancing network. This combination (1) minimizes or eliminates spurious radiation from the balancing network (2) provide... | 12/02/2003 |
| 6621465 | Antenna array having sliding dielectric phase shifters An antenna (10) having a plurality of unitary dipole antennas (12) formed by folding a stamped piece of sheet metal. Each of the unitary dipole antennas (12) are fed by two stripline feed systems (20, 22). Each of these feed systems are separated above an... | 09/16/2003 |
| 6552693 | Antenna A dielectric-loaded antenna for circularly polarized radiation has a generally cylindrical solid dielectric body with a relative dielectric constant greater than 5, upon which body is plated a conductive sleeve encircling the body and a conductive end lay... | 04/22/2003 |
