A system that provides communication using an antenna formed by a gap between a circuit board and a housing of a lighting fixture. A first end of the gap corresponds to a first grounding point that electrically connects the circuit board and the housing and a second end of the gap corresponds to a second grounding point that electrically connects the circuit board and the housing. The distance between the first grounding point and the second grounding point defines a length of the gap and determines an operational frequency of the antenna.

An apparatus for exposing a bulk volume of particles, such as free-flowing or semi-flowable grains, ore, or powders, or a non-flowing mass such as sewage or wet-chopped bio-mass so all of the particles receive near-uniform exposure to a radio frequency (RF) electric and/or magnet (EM) field, preferably without any preference of exposure to a surface or side of particulate. The invention relates to an antenna that can be metallic or plasma for transmitting RF EM radiation into a mechanical mechanism used to convey, or preferably to mix a bulk volume of particles. Embodiments of the apparatus include the ability to adjust the level of EM radiation comprised of one or more frequencies between 30 Hz and 30 EHz to regulate either or both the magnitude of temperature rise and the rate of temperature rise, or to regulate either or both the magnitude of chemical reaction, or rate of reaction.

An apparatus for exposing a bulk volume of particles, such as free-flowing or semi-flowable grains, ore, or powders, or a non-flowing mass such as sewage or wet-chopped bio-mass so all of the particles receive near-uniform exposure to a radio frequency (RF) electric and/or magnet (EM) field, preferably without any preference of exposure to a surface or side of particulate. The invention relates to an antenna that can be metallic or plasma for transmitting RF EM radiation into a mechanical mechanism used to convey, or preferably to mix a bulk volume of particles. Embodiments of the apparatus include the ability to adjust the level of EM radiation comprised of one or more frequencies between 30 Hz and 30 EHz to regulate either or both the magnitude of temperature rise and the rate of temperature rise, or to regulate either or both the magnitude of chemical reaction, or rate of reaction.

An inductively-coupled plasma processing apparatus for performing an inductively-coupled plasma processing on a rectangular substrate, includes: a processing container; a mounting table for mounting the substrate thereon; a rectangular metal window provided to be electrically insulated from the processing container while facing the mounting table; and an antenna unit for generating an inductively-coupled plasma inside the processing container. The metal window is divided into divided regions electrically insulated from each other by a first division extending in a radial direction toward each corner portion of the metal window. The antenna unit includes a first high-frequency antenna in which antenna segments having planar portions facing an upper surface of the metal window are arranged. Each antenna segment is configured by spirally winding an antenna wire in a vertical direction orthogonal to the upper surface of the rectangular metal window so that a winding axis is parallel to the upper surface.

An inductively-coupled plasma processing apparatus for performing an inductively-coupled plasma processing on a rectangular substrate, includes: a processing container; a mounting table for mounting the substrate thereon; a rectangular metal window provided to be electrically insulated from the processing container while facing the mounting table; and an antenna unit for generating an inductively-coupled plasma inside the processing container. The metal window is divided into divided regions electrically insulated from each other by a first division extending in a radial direction toward each corner portion of the metal window. The antenna unit includes a first high-frequency antenna in which antenna segments having planar portions facing an upper surface of the metal window are arranged. Each antenna segment is configured by spirally winding an antenna wire in a vertical direction orthogonal to the upper surface of the rectangular metal window so that a winding axis is parallel to the upper surface.

An apparatus includes a phased array antenna panel and a plurality of beam former circuits. The phased array antenna panel generally comprises a plurality of antenna elements. The plurality of beam former circuits are each mounted on the phased array antenna panel adjacent to a number of the antenna elements. Each beam former circuit has one or more ports directly coupled to each of the adjacent antenna elements. Each beam former circuit may be configured to generate a plurality of radio-frequency output signals at the ports while in a transmit mode and receive a plurality of radio-frequency input signals at the ports while in a receive mode. Each beam former circuit generally implements a hard-wired address.

An apparatus includes a phased array antenna panel and a plurality of beam former circuits. The phased array antenna panel generally comprises a plurality of antenna elements. The plurality of beam former circuits are each mounted on the phased array antenna panel adjacent to a number of the antenna elements. Each beam former circuit has one or more ports directly coupled to each of the adjacent antenna elements. Each beam former circuit may be configured to generate a plurality of radio-frequency output signals at the ports while in a transmit mode and receive a plurality of radio-frequency input signals at the ports while in a receive mode. Each beam former circuit generally implements a hard-wired address.

An antenna comprising: a radio frequency (RF) coupler; a transceiver communicatively coupled to the RF coupler; a laser configured to generate a plurality of femtosecond laser pulses so as to create, without the use of high voltage electrodes, a laser-induced plasma filament (LIPF) in atmospheric air, wherein the laser is operatively coupled to the RF coupler such that RF energy is transferred between the LIPF and the RF coupler; and wherein the laser is configured to modulate a characteristic of the laser pulses at a rate within the range of 1 Hz to 1 GHz so as to modulate a conduction efficiency of the LIPF thereby creating a variable impedance LIPF antenna.

An antenna comprising: a radio frequency (RF) coupler; a transceiver communicatively coupled to the RF coupler; a laser configured to generate a plurality of femtosecond laser pulses so as to create, without the use of high voltage electrodes, a laser-induced plasma filament (LIPF) in atmospheric air, wherein the laser is operatively coupled to the RF coupler such that RF energy is transferred between the LIPF and the RF coupler; and wherein the laser is configured to modulate a characteristic of the laser pulses at a rate within the range of 1 Hz to 1 GHz so as to modulate a conduction efficiency of the LIPF thereby creating a variable impedance LIPF antenna.

An apparatus includes a plurality of transmitter channels and a plurality of feedback networks. Each of the plurality of transmitter channels may be coupled to a respective antenna element in a respective group of antenna elements of a phased array antenna. Each of the transmitter channels generally comprises a power amplifier circuit configured to drive the respective antenna element in the respective group of antenna elements to produce and steer a radio-frequency beam. Each of the plurality of feedback networks may be coupled between an output and an input of a respective power amplifier circuit of a respective transmitter channel. Each of the feedback networks generally comprises a resistor and a capacitor connected in series. The respective power amplifier circuit with the feedback network generally maintains a power matching condition with load variation associated with performing beam steering of the radio-frequency beam using the antenna elements of the phased array antenna.