Abstract: An antenna for a mobile communication terminal in which part of an antenna rod is slidably mounted into an assist antenna rod such that the antenna may be selectively extended in one or two stages. A connecting portion between the antenna rod and the assist antenna rod is rolled so that the antenna rod is prevented from being easily escaped from the assist antenna rod when the antenna is extended in two-stage. Thus, an enhanced communication quality may be obtained by extending the antenna length even when the mobile communication device is slimmed and an optimized length of the antenna is not secured.

Abstract: A chip antenna for use in Bluetooth, in a wireless LAN and in a mobile communication terminal includes an antenna body has an antenna-forming conductor line located therein, and a feeding terminal formed on one end thereof. A PCB (Printed Circuit Board) includes a conductor pattern located thereon so as to be connected to the conductor line of the antenna body. Further, the PCB has a feeding line located on one side of the conductor pattern so as to be connected to the feeding terminal of the antenna body. Still further, the PCB has a fixing terminal located on another side of the conductor pattern so as to be connected to the conductor pattern. Thus, a part of an antenna conductor line is located on the surface of a circuit board, and an antenna body with an antenna formed therein can be installed on the circuit board in a simple manner.

Abstract: Disclosed is a wideband directional antenna in a wireless communication service, comprising at least one radiation element, wherein the radiation element includes at least one loop, wherein one feeding point of the loop is connected to feeder and the other feeding point is connected to a ground distributor.

Abstract: An antenna utilizes multiple radiating elements placed at regular interval around a geometric structure. Each of the individual radiating elements are selectably activated in order to narrow the range of transmission and reception for the antenna. Larger antenna gain is achieved by narrowing the radiation pattern and each individual radiating element has significantly more gain than an omni-directional radiator while also reducing the power output requirements of the transmitter.

Abstract: A GPS receiver includes a slot antenna having first and second surfaces. The second surface includes a semi-circular portion. The first and second surfaces define a slot within which is disposed dielectric material. The slot antenna is optimized for receiving GPS signals when in proximity to a human body. The relatively compact size of the slot antenna allows for the incorporation of the antenna into a small device that can be worn on or carried in close proximity to the body of a user. This type of antenna is not as sensitive to gain variations when in the proximity of a human body because the design has a wider aperture and thus operates better near the body. Further, this type of antenna is virtually omni-directional, i.e., it is not problematically sensitive to the location of the GPS signal source. Moreover, the design is such that the antenna arrangement can be oriented within a device in a way that maximizes the number of GPS satellites tracked.

Abstract: A waveguide array antenna is composed from a number of open waveguides lying in one plane on the radiation side, of which a part is fed on the reverse side thereof, while the other ones are closed off. On the radiation side there is provided at least one two-layer structure, integrated with the open waveguides and consisting of a dielectric layer and a perforated, electrically conductive layer, in which two-layer structure, together with the layer or the face on which this two-layer structure has been provided, a periodically repeating electromagnetic resonance pattern can be generated in parallel directions relative to said face, of which the energy, outputted via the perforations, forms a transmission beam.

Abstract: An antenna assembly (10) for RF communication of signals representing utility meter data. The antenna assembly (10) comprises a first conductor (30) forming at least a portion of an antenna radiating element, a second conductor (28), and a dielectric (34) disposed between the first conductor (30) and the second conductor (28), such that the first conductor (30), the second conductor (28) and the dielectric (34) form a capacitor. The antenna assembly (10) further comprises an inductance (36) in cascade with the capacitor to provide a selected L-C circuit impedance in relation to the antenna radiating element. The second conductor (28) is disposed opposite to the first conductor (30) and at least one of the first and second conductors (28, 30) is movable from a first to a second position to adjust the capacitance of the L-C circuit to a selected frequency of operation.

Abstract: A reflective panel for deflecting electromagnetic waves comprised of a resistive material varying in resistivity across the panel; a center portion on the panel, having a predetermined resistivity; a periphery portion on the panel having a higher resistivity than the center portion; and wherein the center portion of the panel is adapted to reflect the electromagnetic waves and wherein the periphery portion is adapted to minimize diffractions.

Abstract: Methods and apparatus for the supply of non-invasive positive pressure ventilation by motor-driven blowers, and having fast acceleration between treatment pressures, are described. A blower (12) supplies treatment pressure of air or breathable gas to a patient mask (16) via a conduit (14) at a first pressure and at a second, higher pressure. The blower (12) receives its power from a power supply (22) and cascaded motor controller (20). The power supply (22) has the capacity to supply sufficient power for the first pressure to be achieved. A static capacitor (24), that is charged by the power supply (22), provides the energy to the blower (12) to achieve the second pressure, during which period the power supply (22) is effectively shut down.

Abstract: A mobile station and an antenna arrangement for a mobile station, comprising an integrated antenna, an antenna ground plane and an antenna raising component arranged to keep the antenna at a determined height in respect of the ground plane. The antenna, the antenna ground plane and the antenna raising component are arranged in a space shared with a speaker of the mobile station. The antenna is substantially higher than the space between a back cover and a circuit board in the mobile station.

Abstract: A segmented loop antenna formed of many segments connected in an electrical loop where the segments are arrayed in multiple divergent directions that tend to increase the antenna electrical length while permitting the overall outside antenna dimensions to fit within the antenna areas of communication devices. The loop antenna operates in a communication device to exchange energy at a radiation frequency and includes a connection having first and second conductors for conduction of electrical current in a radiation loop. The radiation loop includes a plurality of electrically conducting segments each having a segment length. The segments are connected in series electrically connected between said first and second conductors for exchange of energy at the radiation frequency.

Abstract: Antenna radiator, consisting of two plate-like or film-like parts (1, 2) connected by their foot ends (11) to each other and to the supply connection of the antenna. To reduce especially current and voltage losses, the radiator parts are substantially wider at the foot (1) than at the tip (12).

Abstract: An antenna apparatus which can increase capacity in a cellular communication system. The antenna operates in conjunction with a mobile subscriber unit and provides a plurality of antenna elements. At least one active antenna element is active and essentially centrally located within multiple passive antenna elements. The passive antenna elements are coupled to selectable impedance components. Through proper control of the passive antenna elements, the cellular communication system directs an antenna beam pattern toward an antenna tower of a base station to maximize gain, and, consequently, signal-to-noise ratio. Thus, optimum reception is achieved during, for example, an idle mode which receives a pilot signal. The antenna array creates a beamformer for signals to be transmitted from the mobile subscriber unit, and a directional receiving array to more optimally detect and receive signals transmitted from the base station.

Abstract: An antenna control system enabling the remote variation of antenna beam tilt. A drive means continuously adjusts phase shifters of a feed distribution network to radiating elements to continuously vary antenna beam tilt. A controller enables the beam tilt of a number of antenna at a site to be remotely varied.

Abstract: A distributed antenna device includes a plurality of transmit antenna elements, a plurality of receive antenna elements and a plurality of power amplifiers. One of the power amplifiers is operatively coupled with each of the transmit antenna elements and mounted closely adjacent to the associated transmit antenna element, such that no appreciable power loss occurs between the power amplifier and the associated antenna element. At least one of the power amplifiers is a low noise amplifier and is built into the distributed antenna device for receiving and amplifying signals from at least one of the receive antenna elements. Each said power amplifier is a relatively low power, relatively low cost per watt linear power amplifier chip.

Abstract: An antenna device comprising of two substantial planar and conductive elements where the first element is acting as the radiator of the antenna, and the second element is acting as the ground plane for the radiator of the antenna, said two conductive elements are mounted substantially in parallel by means of a non-conductive housing, and said radiator of the antenna is facing towards the ground plane of the antenna with the cavity in between the first and second conductive elements being filled with air.

Abstract: A glass bulb for a cathode ray tube comprising a panel portion having a substantially rectangular face portion and a funnel portion having a neck portion, wherein when the glass bulb is used for a cathode ray tube, the glass bulb at least regionally suffers from a tensile stress resulting from the atmospheric pressure on the outer surface of the glass bulb having a vacuum inside, at least part of the face portion of the panel portion where the tensile stress over the face portion has a maximum value &sgr;VP has a compressive stress layer formed by chemical tempering on the outer surface, and the &sgr;VP, the magnitude of the compressive stress on the compressive stress layer &sgr;C MPa, and the thickness of the compressive stress layer tC &mgr;m satisfy the following relationship: 120/tC≧(1−|&sgr;VP/&sgr;C|)>30/tC provided that &sgr;VP≧20 MPa.

Abstract: The present invention comprises a substantially omnidirectional antenna with minimal gain variation over the 360 degree azimuth. A plurality of biconical antenna elements are stacked, wherein a feed line passes through the center of the biconical antenna elements. The feed line is designed to provide the proper quantity of power to each biconical antenna element without the use of a power divider. Each biconical antenna element is formed by two truncated flared apart reflecting surfaces. Each biconical antenna element is attached to a nonconductive collar above and below.

Abstract: An organic light-emitting device is provided, which increases the proportion of available light as much as possible and which produces higher brightness with less input power.

Abstract: There is provided a helical antenna structure, which exhibits minimal influence from contact with a human body in a mobile terminal. In the helical antenna structure, a cap protrudes from an upper end of the mobile terminal, and a winding coil is formed within the cap, which is spaced from an outer surface of the cap substantially the same distance from a bottom part of the cap to a top part of the cap.