Abstract: In the waterproof structure of an antenna of the present invention, a width of an open end top of a second notch provided on a projection of a second case is formed so as to be wider than a diameter of a cable, the cable that crosses a recess of a first case is placed in a first notch, and the projection that projects into the recess allows an adhesive to penetrate in the second notch and the adhesive seals a space between the cable and the second notch to thereby seal containers. As the result, a space between a top half of the cable and the second notch is sealed securely with the adhesive, the containers are sealed securely, and reliable waterproofing is realized.

Abstract: A vehicle headlamp includes a reflector, a discharge bulb, a lighting circuit for supplying electric power to the discharge bulb, a socket coupled to the discharge bulb to connect the discharge bulb to the lighting circuit, an opening portion formed in a portion of a lamp body disposed rearwardly of the discharge bulb, and a cover for covering the opening portion. A power source-side connector and a bulb-side connector are fixedly secured to a portion of the lamp body disposed in the vicinity of the opening portion. The lighting circuit and an output connector for connection to the bulb-side connector are integrally formed on the cover. When the cover is moved to open the opening portion, the connection between the power source-side connector and the input connector and the connection between the bulb-side connector and the output connector are simultaneously interrupted.

Abstract: A cylindrical, ray-imaging, electronically steered array antenna, whose radiating array elements are disposed on a cylindrical surface sector above an electrically conductive ground plane that enhances the antenna gain. The conductive ground plane forms an integral part of the antenna, and the required dimensions of this ground plane depend on the array radius, and on the lowest elevation coverage angle from the (possibly tilted) ground plane. The antenna of the present invention is further characterized by a modular design that tailors the required antenna gain and azimuthal directivity through the stacking of identical antenna segments side by side. The antenna design uses the multiple-beam ray focusing property of a microwave lens when feeding a circular ring array, while producing at the same time coherent ray imaging from a bottom metal plate.

Abstract: A high-resolution field emission display that applies a field emission device (or a field emission array) being an electron source element to a flat panel display device. The field emission display includes an upper plate and a lower plate that face each other, wherein the lower plate and the upper plate are vacuum-packaged in parallel positions. A dot pixel of the lower plate includes a high-voltage amorphous silicon thin film transistor formed on the glass substrate of the lower plate, a diode type field emission film partially formed on the drain of the high-voltage amorphous silicon TFT, a passivation insulation layer formed on the high-voltage amorphous silicon TFT and the lateral side of the diode type field emission film, and an electron beam focusing electrode/light-shading film which vertically overlaps with the high-voltage amorphous silicon TFT on some parts of the passivation insulation layer and is formed on a lateral side of the diode type field emission film.

Abstract: An antenna system installation comprising a tower/support structure, and an antenna structure mounted at the top of said tower/support structure, said antenna structure comprises a plurality of antenna elements, a plurality of power amplifiers, each power amplifier being operatively coupled with one of said antenna elements and mounted closely adjacent to the associated antenna element, such that no appreciable power loss occurs between the power amplifier and the associated antenna element, each said power amplifier comprising a relatively low power, relatively low cost per watt linear power amplifier chip, a first RF to fiber transceiver mounted at the top of said tower/support structure and operatively coupled with said antenna structure, and a second RF to fiber transceiver mounted adjacent a base portion of said tower/support structure and coupled with said first RF transceiver by an optical fiber cable.

Abstract: A phased array antenna tile which is steered by microelectromechanical system (MEMS) switched time delay units (TDUs) in an array architecture which reduces the number of amplifiers and circulators needed for implementing an active aperture electronically scanned array antenna so as to minimize DC power consumption, cost and mass of the system, making it particularly adaptable for airborne and spaceborne radar applications.

Abstract: To provide an optical device in which fragments of a concave reflection mirror surrounding a discharge lamp and fragments of an optically permeable glass plate covering the aperture at the front of the concave reflection mirror do not fall and scatter, even if a short-arc high pressure discharge lamp that lights at extremely high mercury vapor pressure should rupture, the outer surface of the glass concave reflection mirror (20) surrounding the high pressure mercury discharge lamp (10) in which 0.16 mg/mm3 or more of mercury is sealed in a discharge envelope is covered by a scatter prevention film (40) made of a polymer material, for example, a fluorine-based resin. Furthermore, a scatter prevention film is applied to the outer surface of the concave reflection mirror in a region of incidence of light over a range within ±40° of the direction orthogonal to the axis of the high pressure mercury discharge lamp.

Abstract: The invention relates to a radio communication card and makes it possible to mount it in an existing card slot by providing an antenna portion on a surface of a card body. There is provided a radio communication card that can be mounted in a card slot of an information processing apparatus. A radio communication logic is contained in the card body and, on a surface of the card body, there is provided an antenna portion which forms at least a part of the surface of the card body. The antenna portion is configured such that it can be moved between a first position of the card body in which it is contained in the card body and a second position in which it protrudes from the card body.

Abstract: An antenna, especially for use with mobile radios, that is mounted in an opening of a motor vehicle. The antenna includes at least one radiator with connecting line and the radiator is mounted in the opening behind a nontransparent, nonconductive covering. In one embodiment the radiator is configured as a monopole with matched balancing antennae that are strip conductors laid out on a printed circuit board attached to a ventilation structure mounted in an opening behind a covering nonconductive bumper.

Abstract: A device for driving a light-emitting element via three transistors includes a driving circuit, a negative voltage circuit, and a protection circuit. The driving circuit has a first transistor and a second transistor for producing a first signal. The negative voltage circuit electrically connected to the driving circuit for transforming the first signal into a second signal to be transmitted to the light-emitting element, and the light-emitting element is driven in response to an operating voltage resulted from the voltage of the second signal and a power voltage. The protection circuit includes a third transistor having two terminals connected to the light-emitting element and the third terminal connected to a base of an NPN transistor for controlling the operating voltage so as to stabilize an output of the light-emitting element.

Abstract: A method and apparatus used to step and correct the position of raster lines in a sinusoidal or zig-zag deflection system. By combining the magnetic flux generated with a rotation “twister” coil and a vertical deflection coil, scan lines can be uniformly spaced and separated nearly to their ends. Accordingly, the magnetic flux generated with the twister coil is adjusted going in the left to right direction then reversed in polarity and readjusted while returning from right to left. It is this controlled twister flux that combines with the linear vertical deflection flux to straighten and then step each scan line to produce an aligned raster.

Abstract: A whip antenna with switchable operative length provides seven band coverage from 30 to 90 MHZ. A coaxial choke section below a fixed upper antenna element is used for the highest frequency band. A series of four coaxial line sections are switchably coupled below the choke section to increase its operative length for operation in bands of successively lower frequency. One or more lumped constant non-coaxial transmission line sections are switchably coupled below the coaxial line sections for operation in the two lowest frequency bands. Dipole level gain is provided with low reflections loss. Increased height gain is provided by height of operative antenna elements employed at higher frequency bands.

Abstract: An apparatus and method for regulating the emission current from a single (macroscopic) field emitter, from groups of emitters within a large (microscopic) array, or from each cell within an array is described. The apparatus includes an additional aperture, fabricated at each field emitter array cell, to create and electron energy filter. The filter aperture of the electron energy filter is similar to the gate aperture but located above or in front of the gate aperture, and is held at a positive potential lower than the gate. The filter allows only those electrons with energy greater than some minimum (the cutoff energy) to pass through. A current-limiting circuit is placed in series with the gate aperture, limiting the total current of electrons that do not pass through the filter. Thus, emission from low energy states is limited without limiting emission from states near the Fermi level.

Abstract: An antenna system is provided which employs RF and DC coupling across a dielectric. RF coupling is achieved using low cost and low loss RF coupler pairs such as quarterwave patches that are mounted opposite each other on either side of a dielectric. The feeds of the patches are aligned so as to be directly opposite each other, and the patches are mounted against the dielectric. A voltage booster circuit can be provided to increase input supply voltage for DC coupling that is adjustable to accommodate the thickness of the dielectric.

Abstract: A method of transferring multiple devices arrayed on a first substrate to a second substrate is provided. The devices on the first substrate are covered with a release agent, and a portion of the release agent, positioned on a device to be transferred is selectively removed. The first substrate is placed on a second substrate in such a manner that the devices arrayed on the first substrate face an adhesive layer previously provided on the second substrate. Only the device from which the release agent has been removed, is irradiated with a laser beam from a back side of the first substrate. The second substrate is then peeled from the first substrate, whereby only the device to be transferred is certainly, efficiently, and accurately transferred from the first substrate to the second substrate.

Abstract: A compact antenna transmits and receives broadband electromagnetic energy signals over a 180° hemispherical pattern in air at the ocean's surface. The antenna has an elongate semi-cylindrical shell and a circular end disc connected to one end, and a semi-circular end disc connected to the other end to form a half-cylinder cavity. A curved plate is connected to the circular end disc and a curved body portion has a curved end extending parallel with the semi-cylindrical shell. A vertical stem has an upper portion connected to the curved plate. The semi-cylindrical shell, circular end disc, semi-circular end disc, and vertical stem are made from a material that is conductive of electromagnetic signals, and they can be differently dimensioned to change the center frequencies to embrace different broadband ranges. The antenna is deployed and retrieved from a submarine in a tow body.

Abstract: Microwave antennas with a dielectric substrate (1) and at least one resonant conductor track structure (31 to 39) are described, which are particularly suitable for mobile dual-band and multiband telecommunication devices such as mobile and cellular telephones, as well as for devices which communicate in accordance with the Bluetooth standard. In addition, attuning of the resonance frequencies of various operating modes to a concrete constructional situation is possible thanks to various line segments (34, 35) and tuning stub lines (41, 42) without the necessity of changing the fundamental antenna design. Finally, the antennas may be soldered together with other components onto a printed circuit board in a conventional surface mounting process.

Abstract: An apparatus and method for driving a plasma display panel (PDP) where a switch device can perform zero voltage switching in driving the PDP. The apparatus for driving the PDP includes a sustain-discharge unit including first through fourth switches respectively connected to both ends of a panel capacitor between a power source and ground, for sustaining a panel capacitor terminal voltage to be at a first or a second sustain-discharge voltage; a first charge and discharge unit including a first inductor, for increasing the voltage of the panel capacitor to the first sustain-discharge voltage and switching a first switch in a state of a zero voltage by half of a resonance current generated by the first inductor; and a second charge and discharge unit including a second inductor, for decreasing the voltage of the panel capacitor to the second sustain-discharge voltage and switching a third switch in a state of the zero voltage by half of a resonance current generated by the second inductor.

Abstract: A miniaturized antenna is described with at least a ceramic substrate (10) and a metallization, particularly designed for use in the high-frequency and microwave ranges. The antenna is characterized in that the metallization is a surface metallization which is formed by a feed terminal (12) for electromagnetic energy to be radiated, by at least a first metallization structure (30), and by a conductor track (20) extending along at least part of the circumference of the substrate (10), which track connects the feed terminal to the at least one first metallization structure (30), which first metallization structure (30) comprises a first conductor track portion (31) extending from a side of the substrate lying opposite the feed terminal (12) towards the feed terminal and a first metallization pad (32).

Abstract: An antenna apparatus has a patch radiator member; a ground-plane back-up element for the patch radiator member; and a feed arrangement connecting the patch radiator member to radio circuitry. The patch radiator member has inner and outer patch portions that define a first open slot between first edges of the patch portions. A metallic wall portion connects second edges of the patch portions that are opposed to the first edges, and reflects a wave propagating toward the metallic wall portion and feeds the reflected wave toward the first open slot with a 180 degree phase reversal. A reflector-and-slot extension-metallic arm is folded over another open slot between the first edge of the inner patch portion and the ground plane back-up element to provide a 180 degree phase reversal by reflect-feedback of an outgoing wave from the another slot. The antenna apparatus can be made in small size for mounting within portable communications devices, while maintaining satisfactory operating characteristics.