Abstract: A loop antenna is constructed by bending a linear conductor so that it forms concavo-convex portions within an antenna plane.

Abstract: A plasma in a vacuum chamber where a workpiece is processed is bounded by a plasma confinement volume including a region between a first electrode simultaneously responsive to power at first and second RF frequencies and a DC grounded second electrode. A DC grounded extension is substantially aligned with the first electrode. A substantial percentage of power at the first frequency is coupled to a path including the first and second electrodes but not the extension while a substantial percentage of power at the second frequency is coupled to a path including the first electrodes and extension, but not the second electrode. Changing the relative powers at the first and second frequencies, as applied to the first electrode, controls DC bias voltage of the first electrode.

Abstract: An electronic device with an automatic antenna. The electronic device includes a body, a cover, an antenna, and a transmission unit. The cover is disposed on the body in a rotatable manner, and the antenna is disposed on the body in a rotatable manner. The transmission unit is connected with the cover and the antenna so that the antenna is rotated relative to the body via the transmission unit when the cover is rotated relative to the body.

Abstract: A diagnostic and configuration identification system for an electrical device and a Photo-controller which automatically turns the electrical device on and off in response to ambient light levels. A detector senses the load drawn by the electrical device when it is on. A processor is responsive to the load drawn by the electrical device when it is on and programmed to detect a cycling fault condition based on the load drawn by the electrical device and to provide an indication of a cycling fault condition according several possible programming configurations. When no cycling or other fault condition is detected the processor determines the cycling fault condition indication configuration and then outputs a cycling signal indicative of the program configuration.

Abstract: A built-in type antenna, with which the electrical connection to a wiring pattern on wiring board can be managed with ease, and the electrical connection can be implemented within a small area. The antenna comprises a base body, on which an antenna element portion is fixed, and a conductive pin having electrical connection with the antenna element portion is disposed in the base body so that the pin can move ups and downs. The bottom end of conductive pin makes an elastic contact to a wiring pattern on wiring board.

Abstract: Water getter devices (10) are provided which comprise a powdered water getter material (18) in a container that is permeable to gases but capable of retaining solid particles and does not need welding.

Abstract: Methods for improving the stability of RF power delivery to a plasma load are disclosed. The method includes adding an RF resistor and/or a power attenuator at one of many specific locations in the RF power system to lower the impedance derivatives while keeping the matching circuit substantially in tune with the RF transmission line.

Abstract: A disclosed exposure device performs controlling exposing dose by gradations of {n×(m−1)+1} stages representing shadow to highlight for each color when exposing the maximum n times under a condition that every light-emitting element is exposure-gradation controlled independently at m-stages. When a silver halide photosensitive material is used as a photosensitive material, light sensitivity is high in the order of red, green and blue. The number of aligned rows of red light-emitting elements is greater than those of aligned rows of other colors for reducing the light-emitting intensity on a time-average basis for every red light-emitting element. The area of red light-emitting elements and the area of green and blue light-emitting elements are simultaneously and independently passive-matrix driven by corresponding driving circuits. Of each light-emitting element, the driving duty improves and the peak light-emitting intensity reduces.

Abstract: This invention relates to a radio antenna as a transmitting antenna or a receiving antenna and a mobile radio system. In accordance with the invention, the radio antenna (MS-A, BTS-A) is a planar antenna and consists of one carrier part (1) of an electrically insulating material, of a coating (s) applied thereon and of two spaced coating feeders (3, 4) having an electrical connection to the interstitial coating (2). This coating is made of a coating material, which consists of specific materials in indicated amounts of substances of one binding agent, insulator, dispersing agent and distilled water. By means of the coating (2), electromagnetic waves are transmittable or receivable with a high frequency selectivity being possible in combination with a spherical characteristic.

Abstract: An n-current blocking layer is formed by alternately stacking an n-first current blocking layer of a nitride based semiconductor containing Al or B and an n-second current blocking layer of a nitride based semiconductor containing In. In a semiconductor laser device having a real refractive index guided structure, the mean refractive index of the n-current block layer is smaller than the refractive indices of a p-first cladding layer and a p-second cladding layer. In a semiconductor laser device having a loss guided structure, the mean band gap of the n-current blocking layer is substantially equal to or smaller than the mean band gap of an active layer.

Abstract: A pulsed solid-state thin-disk laser comprises an optical resonator and a solid-state laser gain medium placed inside the optical resonator. The laser gain medium is in the shape of a thin plate or layer with two end faces, the extension of the end faces being greater than a thickness of said plate or layer measured in a direction perpendicular to one of the end faces. One of the end faces comprises a cooling surface, via which the laser gain medium is cooled. A pumping source is provided for exciting the laser gain medium to emit electromagnetic radiation. The thin-disk laser further comprises means for passive mode locking placed inside the optical resonator. The mode-locking means are preferably a semiconductor saturable absorber mirror (SESAM). The laser offers a high average power, a good beam quality, short pulses and a high efficiency. Problems such as thermal lensing, Q-switching instabilities and damages of the mode-locking means are avoided. Moreover, the output power of the laser is scalable, i.e.

Abstract: A family of FE dielectric-tuned antennas and a method for frequency tuning a wireless communications antenna are provided. The method comprises: forming a radiator; forming a dielectric with ferroelectric material proximate to the radiator; applying a voltage to the ferroelectric material; in response to applying the voltage, generating a dielectric constant; and, in response to the dielectric constant, communicating electromagnetic fields at a resonant frequency. Some aspects of the method further comprise: varying the applied voltage; and, modifying the resonant frequency in response to changes in the applied voltage. Modifying the resonant frequency includes forming an antenna with a variable operating frequency responsive to the applied voltage. Alternately stated, forming an antenna with a variable operating frequency includes forming an antenna with a predetermined fixed characteristic impedance, independent of the resonant frequency.

Abstract: A rapid assembled and detached structure of a lamp comprises a retaining seat, a lamp seat and a connector. The receiving hole is formed in the retaining seat. A bottom end of the receiving hole is mounted with a conductive receptacle. An outer side of the retaining seat is installed with an embedding hole. A lamp seat at a lower end of the retaining seat. A center of the lamp seat has a locating hole. After the retaining seat is installed in the locating hole of the lamp seat. The embedding hole of the retaining seat is communicable to the through hole of the lamp seat. A connector is received in the retaining seat. A bottom end of the connector has a conductive plug capable of being inserted into the receptacle. A receiving groove is formed on the connector and a reed is locked to the receiving groove.

Abstract: A microwave antenna with a simple mounting device for a dielectric plate and a radiating patch is described. The mounting device includes a column, which is secured to a housing at its lower end and extends centrally through a coupling aperture in the dielectric plate up to an aligned opening in the patch. The patch and the plate are held in well-defined positions in relation to the housing and at a mutual distance from each other.

Abstract: An optical control electromagnetic wave circuit comprises a unit composed of a semiconductor layer, a transparent substrate, and a transparent grounded conductive layer and a displaying unit. The semiconductor layer is formed on the transparent substrate, and the photoconductive layer is formed on the opposite surface of the transparent substrate. The displaying unit faces the transparent grounded layer. The shape of the radio wave circuit which is displayed on the displaying unit is mapped on the semiconductor layer to form the radio wave circuit. It can be realized to dynamically change the radio wave circuit by changing the shape of the radio wave circuit displayed on the displaying unit. The radio wave circuit can be provided freely and flexibly.

Abstract: The present invention relates to antenna feeds (10, 30, 70, 78, 94) for use in linear or circularly polarised systems. In one embodiment of the invention, a cross-type antenna feed (30) comprises a cylindrical metal waveguide housing (12) and a cross-type metal feed body (32) coupled to the front of the waveguide housing (12). The feed body (32) has four peripherally spaced corrugated arm portions (34) arranged in a mutually orthogonal relationship, where the arm portions (34) extend radially outwardly from a longitudinal axis (16) of the feed body (32). Ridges (36) on each arm portion (34) are arranged concentrically around the axis (16) and parallel thereto, with successive ridges spaced from the axis (16) in a tiered arrangement. In another embodiment the antenna feed is a dielectric lens. The antenna feed is used in an antenna system having a reflector antenna in addition or in a low noise block (LNB) receiver.

Abstract: A light emitting device includes at least a first light source which is connectable to an energy source, a second light source, detector means for detecting a failure of the first light source, and switch means, responsive to the detector means, for enabling the connection of the second light source to the energy source when the detector means detects failure of the first light source.

Abstract: A ceramic chip antenna for use in ultra-high frequency communications. The ceramic chip antenna according to the present invention comprises a main body, first and second helical conductors, and a single power supply section for supplying power to the first and second helical conductors. The main body is produced by laminating a plurality of ceramic sheets made of a dielectric material. The first and second helical conductors are formed inside the main body by a screen-printing method. The first and second helical conductors have the same axis of helical rotation, as view from the power supply section.

Abstract: A method manages lamp fault conditions in electronic ballasts for one or more gas discharge lamps. The method for fault management of electronic ballast for at least one gas discharge lamp includes the steps of: preheating the lamp filaments applying a low current for a predetermined time; igniting the lamp by increasing at a predetermined rate the voltage applied up to a predetermined strike value; monitoring the lamp current; repeating the steps of igniting the lamp and monitoring the lamp current for a predetermined numbers of times if the lamp current is over a predetermined threshold; and powering the lamp at normal operating conditions.

Abstract: A dual polarized folded dipole antenna comprising: a first unit configured for transmitting and/or receiving signals in a first polarization direction; and a second unit configured for transmitting and/or receiving signals in a second polarization direction. Each unit includes an integrally formed feed section a radiator input section, and radiating section. The feed section is a microstrip feed section, and the radiator input section includes a balun transformer. The antenna has a coaxial to microstrip transition comprising a microstrip transmission line on a first side of the ground plane; and a coaxial transmission line on a second side of the ground plane opposite to the first side of the ground plane. A conductive ground transition body is in conductive engagement with the sleeve of the coaxial line; and a ground locking member applies a force to the ground transition body so as to force the ground transition body into conductive engagement with the ground plane.