566results about "Disturbance protection" patented technology

A patch antenna for operation within a high temperature environment. The patent antenna typically includes an antenna radiating element, a housing and a microwave transmission medium, such as a high temperature microwave cable. The antenna radiating element typically comprises a metallization (or solid metal) element in contact with a dielectric element. The antenna radiating element can include a dielectric window comprising a flame spray coating or a solid dielectric material placed in front of the radiating element. The antenna element is typically inserted into a housing that mechanically captures the antenna and provides a ground plane for the antenna. Orifices or passages can be added to the housing to improve high temperature performance and may direct cooling air for cooling the antenna. The high temperature microwave cable is typically inserted into the housing and attached to the antenna radiator to support the communication of electromagnetic signals between the radiator element and a receiver or transmitter device.

A surge protection device is disclosed that includes an input path for receiving an rf signal, dc power, and a surge, an output path for propagating the rf signal, and a dc blocking device coupled in series between the input path and the output path. The surge protection device also includes a first inductor coupled to the input path for isolating the rf signal and providing a path for the dc power, a gas tube coupled to the first inductor for routing a portion of the surge to a ground plane, a second inductor coupled to the first inductor for providing a path for the dc power, and a metal oxide varistor coupled to the second inductor for routing a portion of the surge to the ground plane. Furthermore, the surge protection device includes a third inductor coupled to the second inductor for providing a path for the dc power, a diode coupled to the third inductor for routing a portion of the surge to the ground plane, and a fourth inductor coupled to the third inductor for providing a path for the dc power to the output path.

Acoustic touch detection (touch sensing) system architectures and methods can be used to detect an object touching a surface. Position of an object touching a surface can be determined using time-of-flight (TOF) bounding box techniques, or acoustic image reconstruction techniques, for example. Acoustic touch sensing can utilize transducers, such as piezoelectric transducers, to transmit ultrasonic waves along a surface and / or through the thickness of an electronic device. Location of the object can be determined, for example, based on the amount of time elapsing between the transmission of the wave and the detection of the reflected wave. An object in contact with the surface can interact with the transmitted wave causing attenuation, redirection and / or reflection of at least a portion of the transmitted wave. Portions of the transmitted wave energy after interaction with the object can be measured to determine the touch location of the object on the surface of the device.

A surge protection device is disclosed that includes an input path for receiving an rf signal, dc power, and a surge, an output path for propagating the rf signal, and a dc blocking device coupled in series between the input path and the output path. The surge protection device also includes a first inductor coupled to the input path for isolating the rf signal and providing a path for the dc power, a gas tube coupled to the first inductor for routing a portion of the surge to a ground plane, a second inductor coupled to the first inductor for providing a path for the dc power, and a metal oxide varistor coupled to the second inductor for routing a portion of the surge to the ground plane. Furthermore, the surge protection device includes a third inductor coupled to the second inductor for providing a path for the dc power, a diode coupled to the third inductor for routing a portion of the surge to the ground plane, and a fourth inductor coupled to the third inductor for providing a path for the dc power to the output path.

An antenna module with proximity sensing function is provided for being disposed inside an electronic device and comprises a ground plane, an antenna, a sensing element, an electrostatic protection element, a high-frequency blocking element and a capacitive proximity sensor. The antenna is coupled to the ground plane. The sensing element is connected to the capacitive proximity sensor through the high-frequency blocking element and produces a capacitance signal when sensing the approach of an object for accordingly reducing the output power of the antenna module. The electrostatic protection element is coupled between the sensing element and the ground plane, exhibits low / high impedance, respectively, at high / low frequency and further changes to an extremely low impedance to provide a conducting path to quickly lead a static high voltage to the ground plane for keeping the electronic device operating normally when the electronic device encounters the problem of the electrostatic discharge

A self-contained radio frequency (RF) wireless communication device (100) comprising an explosion-proof housing (110), an internal electronic system for the conversion of radio wave and conducted electrical signals, and an internal antenna system located within a non-metallic portion (130) of the housing for collecting and emitting radio wave energy. The antenna system enables the wireless communication device (100) to safely collect and emit radio wave energy using one or more optimally configured antenna resonators (351), with each antenna resonator differing each other antenna resonator by at least one attribute in a group of attributes comprising: frequency response, field polarization, and wavelength spatial diversity.The present invention is a self-contained RF wireless communication device that provides data communications between two or more devices for the supervisory control and / or data acquisition of actuators, sensors, transducers, gas detectors, and other devices located in explosive hazardous locations without the need of installing one or more external antennas, one or more antenna connectors, excessive conduit connections and seals, and the like, whereby reducing system installation components count and eliminating conduit connections, furthermore reducing the probability of system-level failures caused by lower-level faults of components and conduit connections, resulting in a less expensive and safer electrical equipment installation.

The radio frequency integrated circuit (RFIC) electrostatic discharge (ESD) circuit includes an integrated circuit pin and a radio frequency (RF) ESD circuit. The integrated circuit pin provides coupling to an antenna. The RF ESD circuit is operably coupled to the integrated circuit pin, wherein the RF ESD circuit provides ESD protection at the integrated circuit pin, provides coupling of inbound RF signals from the antenna to low noise amplifier, and provides coupling of outbound RF signals from a power amplifier to the antenna.

An antenna system loaded in a vehicle according to the present invention includes a first antenna system to perform beamforming by a plurality of first communication antenna elements disposed to transmit and receive a first signal according to a first communication system, and a second antenna system to perform a Multi Input Multi Output (MIMO) by a plurality of second communication antenna elements disposed to transmit and receive a second signal according to a second communication system, whereby a plurality of communication services can be provided through a flat vehicle antenna having beamforming array antennas capable of providing next generation communication services and MIMO antennas capable of providing existing mobile communication services.

The radio frequency integrated circuit (RFIC) electrostatic discharge (ESD) circuit includes a transformer balun, an impedance matching circuit and a clamping circuit. The balun is operably coupled to transpose a single-ended radio frequency (RF) signal and differential RF signal. The balun includes a 1st winding that is coupled to the single-ended radio frequency signals and a 2nd winding that is coupled for differential RF signals. The impedance matching circuit is coupled to the 1st winding and provides, in conjunction with the impedance of the balun, impedance matching with an antenna coupled to the RFIC. The clamping circuit is operably coupled to the balun and / or to the impedance matching circuit and, in combination with the impedance matching circuit and / or in combination with the balun, provides ESD protection for the receiver section and / or transmitter section of the radio frequency integrated circuit.

A device for connecting an antenna to a hazardous enclosure. The device includes an intrinsically safe barrier for protection against electrical surges, and an explosion-proof device enclosure to contain the force of an explosion.

A patch antenna for operation within a high temperature environment. The patent antenna typically includes an antenna radiating element, a housing and a microwave transmission medium, such as a high temperature microwave cable. The antenna radiating element typically comprises a metallization (or solid metal) element in contact with a dielectric element. The antenna radiating element can include a dielectric window comprising a flame spray coating or a solid dielectric material placed in front of the radiating element. The antenna element is typically inserted into a housing that mechanically captures the antenna and provides a ground plane for the antenna. Orifices or passages can be added to the housing to improve high temperature performance and may direct cooling air for cooling the antenna. The high temperature microwave cable is typically inserted into the housing and attached to the antenna radiator to support the communication of electromagnetic signals between the radiator element and a receiver or transmitter device.

A ballistic protective radome (10) consisting of substantially longitudinal layer members (14) firmly and densely packed in a uniform array, forming a main protective layer (12). The layer members (14) are mutually spaced apart and electrically isolated such that a continuous gap (18) is formed in the main protective layer (12). The layer members (14) are made of mechanical energy absorbing and high tensile strength materials such as ceramics, metallic alloys nanoparticulate ceramics and nanoparticulate metallic alloys. The surface of the layer members is electrically conducting, optionally by plating with a layer of highly electrically conducting materials having a width of a few skin depths. Optionally a dielectric layer (16) is attached to at least one surface border of the main protective layer for promoting the ballistic features of the radome and providing for impedance matching. A method for tuning the operational frequency of the radome is provided by grouping the layer members in pairs (12A-12C) of layer members having collinear main axes. Optionally discs (26D-26F) having electrically conducting surface are inserted into the gaps between the paired layer members.

A high voltage proximity warning system utilizing wireless sensors for preventing heavy equipment from contacting high voltage lines is provided. The warning system is adapted for use with mobile heavy equipment that can be used around overhead power transmission lines. The alarm system consists of a number of wireless radio linked proximity antennas mounted on heavy equipment in locations that could possibly come into contact with high voltage lines. These wireless antennas detect the electric field in the proximity of the high voltage lines and transmits signals to a control panel located in the proximity of the operator of the equipment. The resulting signal level is displayed on the control panel along with an alarm setpoint. If the signal level rises above the alarm setpoint, the control panel provides a visual alarm indication, an audio alarm annunciation, and control signals that can directly inhibit specific functions of the heavy equipment.

The radio frequency integrated circuit (RFIC) electrostatic discharge (ESD) circuit includes an integrated circuit pin and a radio frequency (RF) ESD circuit. The integrated circuit pin provides coupling to an antenna. The RF ESD circuit is operably coupled to the integrated circuit pin, wherein the RF ESD circuit provides ESD protection at the integrated circuit pin, provides coupling of inbound RF signals from the antenna to low noise amplifier, and provides coupling of outbound RF signals from a power amplifier to the antenna.

A load control device for controlling the power delivered from a power source to an electrical load includes an antenna and a communication circuit to receive and transmit messages via radio frequency (RF) signals. The communication circuit is coupled to the power source but is capacitively coupled to the antenna. The capacitive coupling is formed through multiple layers of a printed circuit board (PCB) in which each layer includes a conductive trace that neighbors another conductive trace on an adjacent layer. The capacitive coupling provides that the antenna is electrically isolated from the communication circuit which accordingly, provides that the antenna is electrically isolated from the power source.

A ballistic protective radome (10) consisting of substantially longitudinal layer members (14) firmly and densely packed in a uniform array, forming a main protective layer (12). The layer members (14) are mutually spaced apart and electrically isolated such that a continuous gap (18) is formed in the main protective layer (12). The layer members (14) are made of mechanical energy absorbing and high tensile strength materials such as ceramics, metallic alloys nanoparticulate ceramics and nanoparticulate metallic alloys. The surface of the layer members is electrically conducting, optionally by plating with a layer of highly electrically conducting materials having a width of a few skin depths. Optionally a dielectric layer (16) is attached to at least one surface border of the main protective layer for promoting the ballistic features of the radome and providing for impedance matching. A method for tuning the operational frequency of the radome is provided by grouping the layer members in pairs (12A-12C) of layer members having collinear main axes. Optionally discs (26D-26F) having electrically conducting surface are inserted into the gaps between the paired layer members.

A process control instrument includes a circuit board having a control circuit for generating or receiving a high frequency signal. An antenna includes an electrical conductor. An intrinsic safety circuit couples the control circuit to the antenna and comprises a microstrip transmission line on the circuit board electrically connecting the control circuit to the electrical conductor. A safety stub has a first end electrically connected to the transmission line proximate the electrical conductor and a second end connected to a ground of the control circuit.

An antenna system suitable for a mobile device is disclosed. The mobile device includes a display casing with a conductive region and a non-conductive region. The antenna system includes a driven element having an inverted-F antenna arranged in the non-conductive region of the display casing. The display casing is also provided with an electrostatic discharge (ESD) conductor as a countermeasure against ESD. The ESD conductor is connected to the conductive region of the casing. The ESD conductor causes static charges in the air to be discharged to the conductive region of the casing. The ESD conductor also produces harmonic resonance and exchanges electromagnetic energy with the driven element to improve the gain of the driven element.

A mobile antenna includes a center-fed, broadband, dipole radiator, and a coupler assembly for mounting the dipole radiator to a mount. A power matching circuit is connected between the dipole radiator and the coupler assembly to maintain an effective balance of current distribution and impedance in conductive elements of the antenna.

An active antenna system having lightning, corona and low frequency static energy protection includes a plurality of patch antenna elements, a feed structure operatively interconnecting the patch antenna elements, and at least one conductive drain line coupled with each of the patch antenna elements. The drain lines are coupled together at a common ground connection point.

An antenna module with proximity sensing function is provided for being disposed inside an electronic device and comprises a ground plane, an antenna, a sensing element, an electrostatic protection element, a high-frequency blocking element and a capacitive proximity sensor. The antenna is coupled to the ground plane. The sensing element is connected to the capacitive proximity sensor through the high-frequency blocking element and produces a capacitance signal when sensing the approach of an object for accordingly reducing the output power of the antenna module. The electrostatic protection element is coupled between the sensing element and the ground plane, exhibits low / high impedance, respectively, at high / low frequency and further changes to an extremely low impedance to provide a conducting path to quickly lead a static high voltage to the ground plane for keeping the electronic device operating normally when the electronic device encounters the problem of the electrostatic discharge.

According to one embodiment, a radome includes two dielectric layers separated by an internal layer. The internal layer is configured with an internal cooling system including a fluid channel that receives a fluid through an inlet port, conducts heat from the radome to the fluid, and exhausts the heated fluid through an outlet port.

A film antenna and a mobile communication terminal case using the same. The film antenna includes a carrier film made of an insulation material, a conductive radiator formed on a surface of the carrier film, and a first protective layer covering the radiator on the surface of the carrier film. The first protective layer contains a material obstructing X-ray transmission.

The invention discloses a feed network of a splitting antenna and the splitting antenna. The feed network comprises a cavity, a printed circuit board (PCB) and at least two radio-frequency signal input ports, wherein the cavity comprises an upper ground metal plate and a lower ground metal plate; the PCB is arranged in the cavity; a splitting network circuit in the feed network and a phase-shifting circuit are integrated into the PCB; a wire on the PCB is in a strip line structure as a whole through the arrangement of the PCB and the cavity; the at least two radio-frequency signal input ports are connected with the splitting network circuit in the PCB; after radio-frequency signals input by the at least two radio-frequency signal input ports sequentially pass through the splitting network circuit in the PCB and the phase-shifting circuit; at least two wave beams with an included angle there-between are formed through an antenna element of the splitting antenna; and integration of the splitting network circuit and the phase-shifting circuit is achieved, so that the feed network structure of the splitting antenna is simplified; and the reliability of passive intermodulation PIM of an antenna system is improved.

A computerized monitoring apparatus processes signals representing (a) incident power I2 to an antenna, (b) reflected power R2, radiated power T2, and arc voltage power A2. The monitor provides warning of arcing or overheating in the feedlines to (and inside) the antenna before catastrophic failure. Early warning of developing failures allows for orderly transition to standby transmission and avoids losing on-air time. The monitoring apparatus also provides a failsafe indication of whether power is delivered to the antenna and whether the antenna radiates the power delivered to it. Such failsafe indication is required before personnel are allowed near the antenna. The apparatus measures the relative power density at specified locations near and on the tower, and compares the measured RFR exposure density to that allowable by the Federal Communications Commission. The monitoring apparatus can be applied to multiple transmitters with multiple channel combiners feeding a common antenna connection.

A lighting system can include a light fixture located in a hazardous environment, wherein the light fixture comprises a controller. The light fixture can also include a sensor module communicably coupled to the controller of the light fixture, wherein the sensor module comprises a sensor module housing and a sensor disposed within the sensor module housing, wherein the sensor module housing comprises a first coupling feature that couples to a hazardous location enclosure. The hazardous location enclosure and the sensor module, when coupled to each other, can comply with applicable standards for the hazardous environment.

A film antenna includes a carrier film made of an insulation material, a conductive radiator formed on a surface of the carrier film, and a first protective layer covering the radiator on the surface of the carrier film. The first protective layer contains a material obstructing X-ray transmission.