Abstract: There is provided a conductive hollow tube (3) which is brought into tight contact with the top surface of a grounding conductor (1a) at a position where a first end having an opening plane (4a) with an inner diameter matching a diameter of a hole (2a) formed on the grounding conductor (1) overlaps with the hole (2a), and which is bent so that an opening plane (4b) of a second end faces the top surface direction and that an intermediate portion between the first end and the second end is arranged parallel to the grounding conductor (1), and a conductive liquid supplied from the opening plane (4a) of the first end is passed through the conductive hollow tube (3) and discharged to the outside from the opening plane (4b) of the second end.
Abstract: A phased array antenna device is described. The phased array antenna device includes at least one one-dimensional phased array of radiating elements arranged along an array direction, a lens, and a phase control element. The lens is arranged such that divergent beams from the radiating elements are collimated by the lens in a direction orthogonal to the array direction to produce a beam. The phase control element is configured to apply a linear phase gradient to the radiating elements thereby providing one-dimensional electronic beam steering for the antenna device. The antenna device may additionally include one or two mechanical positioners to mechanically move the at least one one-dimensional phased array in directions orthogonal to the array direction, where the phased array enables scanning along the array direction.
April 29, 2008
Date of Patent:
March 13, 2012
Christopher Tze-Chao Koh, Thomas Robert Newman, Kent Arthur Whitney
Abstract: The present invention provides a storage medium having intelligence that has, in one-piece, a storage medium and an electronic circuit, and has communication structure with an external apparatus to reduce loads of a main-frame of a system, and that can further manage and control external system equipment, the apparatus communicating information with the electronic circuit, and a system including them. The electronic circuit mounted on the intelligent disk 2 has a contact type or a non-contact type interface as communication structure. The contact type interface is connected to an external contact electrically and/or mechanically. The non-contact type interface is connected to an external interface via sound, light, radio waves, or induction. The non-contact type, a plurality of balanced microstrip lines are formed on a rotating medium and a fixed body in concentric circles, they are located so that respective balanced microstrip lines face.
Abstract: An antenna including a plurality of radiating elements disposed in mutually orthogonal pairs arranged in a predetermined pattern to radiate and receive RF signals over multi-octave frequency bands; and divergent lens means to provide stability for the predetermined pattern of radiating elements.
Abstract: A telescopic rod antenna according to the present invention includes an antenna element and a waterproof ring-shaped seal member which is inserted in a ring-shaped gap in a joint between two rods of the antenna element. The ring-shaped seal member is obtained by shaping a thermoplastic resin film strip, on which at least one projecting portion is formed in its longitudinal direction, like a ring and compressing and inserting a ring-shaped film into the ring-shaped gap. A plurality of ring-shaped contact portions are formed on both sides of the film strip in its longitudinal direction while the projecting portion of the film strip serves as a basic contact portion. The ring-shaped contact portions are adhered to the inner surface of the larger-diameter rod and the outer surface of the smaller-diameter rod at a predetermined pressure.
Abstract: An E-field generator for r.f. susceptibility testing comprises first and second conductive arms, each comprising a conductor having a U-shaped portion. A driving circuit connected to first ends of each conductor delivers r.f. power to the arms. A load resistance is connected between the opposite ends of the conductors. The U-shaped portions of the elements are disposed opposite each other in spaced relationship so that a device to be tested can be positioned between them. The elements are mounted on a housing which encloses the load resistance as well as a 9:1 balun. The elements are removably secured in clamps, and the housing has provisions for mounting in alternative positions.
Abstract: A wire antenna having a Vivaldi taper that is used to radiate or receive low frequency RF energy from or to an airborne platform. The antenna comprises two conducting wires that trail from the platform, and which comprise a radiator having a Vivaldi taper. The shape of the conducting wires is maintained by a combination of aerodynamic drag on the conducting wires, a weight connected to the end of the lower wire, a chute connected to the end of the upper wire, and nonconducting guy-wires connecting the upper and lower conducting wires. The nonconducting guy-wires are positioned at locations between the upper and lower conducting wires to form and maintain an optimal taper between the conducting wires. A method of deploying a Vivaldi antenna from an airborne platform is also disclosed. A lower conducting wire is attached to the enclosure, and an upper conducting wire is attached to a chute. The antenna and chute are stored in the enclosure, and the enclosure is disposed beneath the platform.
July 24, 1995
Date of Patent:
February 4, 1997
Hughes Missile Systems Company
Kenneth W. Brown, Keith G. Kato, David R. Sar, Byron M. Niemeier
Abstract: A broad band dipole antenna of short length is formed by two tubular linear radiators which are spaced apart at their adjacent inner ends. Each of the radiators is encased in an electrically insulative sleeve and the antenna is liquid loaded along its length by a jacket of conductive fluid disposed between the insulative sleeve and an insulative tubular housing surrounding the radiators. The dipole is center-fed and each of the radiators, at its outer end, terminates in a connection to one end of a lumped resistive load whose other end is connected to a conductive disk that is in contact with the conductive liquid.
Abstract: The two channel transmit only antenna includes a balanced antenna and a ground plane disposed between the two radiators of the balanced antenna. The two radiators are fed by a three wire arrangement having one conductor connected to ground and the ground plane and two conductors each connected to a different one of the two radiators. A first channel filter is coupled between a first source providing a first transmit signal in a first frequency channel and one of the two conductors and a second filter is coupled between a second source providing a second transmit signal in a second frequency channel and the other of the two conductors. At least one resistor is connected between the two radiators.
May 11, 1981
Date of Patent:
May 3, 1983
International Telephone and Telegraph Corporation
Abstract: An apparatus and method wherein an electrical impulse source transmits a radar-type signal through an antenna into the ground and is reflected by a target. The reflected signal or echo is detected by the antenna and an analog-to-digital converter converts it to a digital form which may be readily operated on, stored and recalled. A memory stores the information until recalled for comparison with a subsequent signal to give an indication of the location of metallic and non-metallic buried targets.