Abstract: An antenna device includes: a radiator having a meander portion; and a conductor shorter than the radiator which is disposed opposite to the radiator. A coaxial cable is connected to the radiator and conductor. Respective line lengths of the radiator and conductor satisfy a predetermined relation with respect to a wavelength of a signal to be transmitted and received. The antenna device achieves at least one of improved antenna characteristics, downsizing, and improved mechanical strength.

Abstract: A portable computer includes a base and a top movably mounted on the base. A non-conductive transparent display layer is mounted in the top and includes a channel formed therein that contains layers of transparent conductive and transparent non-conductive materials. A cable is connected to the base. A cable extension is coupled to and extends from the cable. The cable extension is imbedded in the channel. An antenna is coupled to the cable extension and is imbedded in the channel.

Abstract: A waveguide has a circuit board disposed therein so that the circuit board is orthogonal to the waveguide axis, and the circuit board has a first probe and a second probe formed thereon for respectively extracting the vertically and horizontally polarized waves, and has a fine radiation pattern also formed thereon which intersects each of the axes of the first and second probes at about 45 degrees. The fine radiation pattern is disposed in the vicinity of the waveguide axis and is formed by patterning in a rectangular shape that is asymmetrical relative to each of the axes of the two probes. This configuration allows the fine radiation pattern having a relatively small shape to prevent the electric field of these polarized waves in the waveguide from being disturbed, thereby leading to a reduction in reflection of these polarized waves at the fine radiator while the radiator achieves sufficient isolation between the vertically and horizontally polarized waves.

Abstract: The shielded spiral sheet antenna concept permits a small efficient antenna structure that is much smaller than the electromagnetic wavelength. In such small structures, the radiation usually goes almost all directions. A geometrical structure that shields the radiation from absorbers, and it directs the radiation in the opposite direction. This is difficult to achieve in very small radiators. At the same time, the shielded spiral sheet structure is more efficient than other antennas. Its radiation is shielded from an adjacent absorber by an asymmetric metallic border. The specifications of the asymmetric metallic border are given by an operational mathematical procedure.

Abstract: A mobile communication device comprises an antenna and a housing enclosing a circuit board having communication components disposed thereon to transmit and receive communication signals. The antenna includes a substrate having opposite first and second surfaces, a planar conducting layer, a quarter wave choke strip, and a monopole conducting layer. The planar conducting layer is disposed on the first surface of the substrate, while the quarter wave choke strip and the monopole conducting layer are disposed on the second surface of the substrate. The quarter wave choke strip is electrically coupled to the planar conducting layer and connected to the monopole conducting layer. The antenna may be configured to work in three frequency bands: an upper band, a middle band, and a low band.

Abstract: A metal halide discharge lamp can include a light emitting tube having a discharge chamber formed in the light emitting tube and containing no mercury. A pair of electrodes can be provided with a portion, which projects into the discharge chamber. The discharge chamber can include a buffer gas, which also acts as a starter gas, of xenon (Xe) in an amount of 7-20 atmospheres at room temperature, and at least one kind of metal halide. The light emitting tube can have a positive resistance range in current-voltage characteristics relative to a varying input electric power. In the positive resistance range, the light emitting tube can be driven by an electric power which is less than or equal to a rated power supplied during steady lighting. In the metal halide lamp of the invention, even if the input electric power to the light emitting tube is varied, sudden unintentional extinguishment does not occur, and varying range of light color can be narrowed.

Abstract: An artificial magnetic conductor includes a frequency selective surface having a frequency dependent permeability &mgr;1z in a direction normal to the frequency dependent surface, a conductive ground plane, and a rodded media disposed between the frequency selective surface and the conductive ground plane.

Abstract: A phased array antenna having a plurality of independent antenna modules which are arranged in a manner to significantly improve cross polarization isolation of the antenna. The antenna modules are arranged in rows and columns to form a grid arrangement. Each antenna module has a pair of radiating elements, and each module is rotated 90° from its adjacent antenna modules in each column. In this manner, the worst case cross polarization isolation performance of each module is not summed together at the same azimuth scan angle as every other module but rather is broken up over the entire azimuth scan angle.

Abstract: A vehicular glass antenna wherein the antenna is formed of transparent material and is mounted at a front windshield glass where receptive performance of broadcasting signals is best without obstructing a driver's view.

Abstract: An antenna for a wireless computer system, such as a laptop or notebook computer that is coupled to a wireless LAN. The antenna is configured in a form that provides information to the computer user and, in one embodiment, may constitute all or part of a logo that identifies an entity from whom the user acquired the computer. In one embodiment, the antenna is disposed in planar form on an enclosure associated with the computer system. Alternatively, the antenna may be printed on a printed circuit board, such as a wireless adapter PCMCIA card that includes baseband circuitry, RF circuitry, and contacts for effecting an interface to the portable computer.

Abstract: A planar inverted F antenna with stable radiation characteristics, which is not vulnerable to ambient influence, having, an insulator, a radiation device formed on one surface of the insulator and a grounding plate formed on the other surface thereof. A coaxial cable has a central conductor electrically connected to the radiation device and an outer conductor electrically connected to the grounding plate at two points spaced from each other by approximately a quarter of the wavelength of current flowing through the outer conductor. If leakage current flows along the outer conductor, the leakage current is negated by an inverse-phase current flowing through the grounding plate.

Abstract: An antenna array comprising a ground plane and a plurality of elements mounted thereon, said elements being capable of emitting and receiving ultra wideband emissions. Elements are arrayed on the ground plane in two parallel rows, a transmitting row, and a receiving row, such that a given element in the receiving row is aligned in at least one direction with a corresponding element in the transmitting row. Additionally, the elements are configured on the ground plane to elicit a symmetrical product response in the azimuthal plane, and to produce horizontally polarized signals. An alternative embodiment places the elements with unique inter-element spacing within the rows. An embodiment comprises a fence structure between rows. A method for use comprises the step of transmitting a signal via an element in the transmitting row and receiving said signal through an element in the receiving row, not aligned with the transmitting element.

Abstract: An antenna transducer assembly, and an associated method, for a mobile station, or other radio transducer. The antenna transducer assembly includes first and second antenna transducers disposed upon a substrate. The antenna transducers are elongated transmission lines and are of lengths to facilitate their transducing of radio signals that are generated to be of first and second frequency characteristics. The first antenna transducer includes a distal end part that defines an edge face surface. And, the second antenna transducer includes a distal end part such that a distal end part thereof is positioned in an orthogonal relationship to the edge face surface of the first antenna transducer.

Abstract: A dielectric barrier discharge apparatus for treating a substrate includes a first planar electrode; a dielectric layer disposed on a surface of the first planar electrode; a porous planar electrode spaced above and in a parallel plane with the dielectric layer, wherein the porous planar electrode has a geometric transmission factor greater than 70 percent; and a power supply in electrical communication with the first electrode and the second electrode. A process for treating a substrate includes exposing the substrate surface to reactants produced by the dielectric barrier discharge apparatus.

Abstract: A multi-frequency antenna apparatus includes an open-ended slot antenna (20) operable at high frequencies, cascaded in series with a antenna element (22) operable at low frequencies, results in two distinct antennas fed by a single excitation port (33). A U-shaped conductive strip (21) defining the slot antenna (20) has a ground connection (37) at one end near the open-ended side of the slot antenna (20) and a virtual feed point (30) on the other end coupled to the antenna element (22). The electrical length from the ground connection (37) to the feed point is about ¼ of a wavelength of the first frequency creating a virtual open at the feed point (30).

Abstract: The flat typed assembling structure comprises an external insulating sleeve, an inner insulating sleeve adapted to assembling in the external insulating sleeve, a coil with a specified diameter positioned between the inner and external insulating sleeves, and a top lid connected with the top of the external insulating sleeve; wherein, the outer surface of the inner insulating sleeve and the inner wall of the external insulation sleeve are provided respectively with convex annular ribs and concave annular recesses for connecting of the sleeves; the inner insulating sleeve has its front and rear sides both flattened to leave a front and a rear opening, to form an internal receiving space to receive therein the coil; a guiding and connecting stub is provided at the bottom of the internal receiving space, so that the coil can be positioned between the guiding and connecting stub and the bottom end of the top lid.

Abstract: A multiple-element antenna is provided that includes a monopole portion and a dipole portion. The monopole portion has a top section, a middle section, and a bottom section. The middle section defines a recess between the top and bottom sections, and the bottom section includes a monopole feeding port configured to couple the monopole portion of the multiple-element antenna to communications circuitry in a mobile communication device. The dipole portion has at least one dipole feeding port configured to couple the dipole portion of the multiple-element antenna to communications circuitry in the mobile communications device. The dipole portion of the multiple-element antenna is positioned within the recess defined by the monopole portion of the multiple-element antenna in order to electromagnetically couple the monopole portion with the dipole portion.

Abstract: A compact planar antenna is disclosed wherein a radiating element in the shape of a right triangle is formed on a substrate. A ground plane may be positioned on one or both sides of the substrate. In one embodiment, the radiating elements are positioned on the substrate in groups of two or more in close proximity to one another. In another embodiment, the radiating elements are arranged in an array.

Abstract: A compact planar antenna is disclosed wherein a radiating element in the shape of a right triangle is formed on a substrate. A ground plane may be positioned on one or both sides of the substrate. A slot extends into the radiating element from one side thereof.

Abstract: An antenna device includes an antenna member secured on a seat, a circuit board disposed between the seat and the antenna member, a light device attached to the circuit board, and one or more magnetic members for magnetically attracting the seat to various objects, such as the vehicles, and for allowing the antenna device to be moved or adjusted to any suitable positions or places of the vehicle. One or more casings may be used for securing the magnetic members to the seat. The light device may generate the lights for warning or for decorative purposes.