609results about How to "Reduce electromagnetic radiation" patented technology

A voice communication device such as an earpiece that provides for ultra short range transmission of voice sound information using ultra wide band (UWB) radio communications is disclosed. According to one embodiment of the present invention, a voice communication device includes a speaker, a bone conduction sensor for sensing voice sound vibrations, and an UWB transceiver operatively connected to the speaker and the bone conduction sensor. According to another embodiment of the present invention, a voice communication device is disclosed that includes an earpiece housing, a speaker operatively connected to the earpiece housing for transducing audio, an air conduction sensor operatively connected to the housing for sensing voice sound information, a processor electrically connected to the speaker and the bone conduction sensor and disposed within the earpiece housing, and an UWB transceiver operatively connected to the processor.

An easily removable modular optical signal transceiver unit for conversion between modulated light signal transmission and electronic data signals and which conforms to the Small Form Factor standard for transceiver interfaces is disclosed. The structural details of its chassis include aspects which insure the proper positioning of electronic circuit boards of a transmitter optical subassembly and a receiver optical subassembly as well as the positioning of electromagnetic radiation shielding on the chassis. In conjunction with an interface device on an electronic circuit board of a host device, the chassis supports electromagnetic radiation shielding which substantially encloses the sources of electromagnetic radiation within the module and suppresses the escape of electromagnetic radiation, thereby preventing electromagnetic interference with sensitive components and devices in proximity to the module.

A protection system for a fiber optic coupling having a first housing with a guide slot in a side wall includes a protective cap with a slot in a side wall and defining a passage for receiving the first housing whereby the protective cap slot aligns with the guide slot in the first housing and a protective shutter pivotally connected to the protective cap for covering a distal end of the fiber optic coupling.

An electrical connector includes a heat dissipation module with a first end and a second end opposed to the first end and two receptacle connectors located at the second end. The first and second ends define a transceiver-mating direction such that, when a transceiver is inserted into the first end of the heat dissipation module in the transceiver-mating direction, the transceiver mates with one of the two receptacle connectors, and in the heat dissipation module, air flows parallel to the transceiver-mating direction between the first and second ends and flows between the two receptacle connectors.

Electromagnetic Bandgap (EBG) structures are embedded between adjacent power planes in a multi-layer PCB to decrease the emanation of Electromagnetic radiation induced by power buses, signal layers, as well as to suppress the switching noise. EBG stages with different stop bands are cascaded to create rejection over a wider frequency region. The cascading can be performed in series, or may be formed in a variety of arrangements such as a checkerboard design or concentric ribbons positioned along the perimeter of the PCB. Each EBG stage is composed of conductive patches and via posts extending from each patch, which are positioned at a predetermined distance from each other. By surrounding the source of the noise with EBG stages, a sufficient suppression of electromagnetic noise over specific frequency bands of interest is achieved.

The present invention relates to a barrier tape used as part of a communication cable to improve crosstalk attenuation. The barrier tape is provided with one or more barrier layers of discontinuous conductive segments. Conductive segments of one barrier layer are preferably sized and shaped to overlie gaps between conductive segments of another barrier layer.

A mobile phone capable of reducing an electromagnetic SAR in human bodies includes a base and a cover disposed on the base. The base includes an antenna for transmitting and receiving electromagnetic waves. The cover includes a screen and buttons. Electromagnetic absorbing materials having electric or magnetic loss are applied on the cover to mitigate electromagnetic waves radiating from the antenna into the user. Moreover, a meandered planar inverted-F antenna is attached to the back of the circuit board near the bottom of the base, which can generate a lower near field at the user's side than those in other directions, thereby reducing the electromagnetic specific absorption rate of the mobile phone in human bodies.

A capacitive sensor system for controlling operation of a device in response to a rate of change in capacitance due to motion of a proximate object includes at least two sense electrodes disposed on a surface and a phase locked loop, including a voltage controlled oscillator and a phase / frequency comparator, connected between the sense electrodes and an RC network for providing an operating frequency to the sense electrodes. A circuit loop, including a reference oscillator, provides a fixed frequency reference for the phase locked loop to follow and a phase delay circuit connected between the phase / frequency comparator and the voltage controlled oscillator causes the voltage controlled oscillator to run ahead of the reference oscillator. A trigger circuit provides a control output in response to a change in phase shift between the fixed frequency and the operating frequency.

A power supply for a Light Emitting Diode (LED) traffic signal that controls the light intensity. The light intensity conforms to a predetermined pattern based on the input voltage root mean square value (Vrms). The input voltage is changed by acting on the amplitude of the sine wave or by using a triac and controlling the angle of fire. The power supply comprises a fuse module, an electromagnetic compatibility filter module, a power supply module, a LED load module, a current monitor module, a RMS-DC conversion module and a fuse blow out module.

A method of selecting and controlling devices based on wireless communication technology. The wireless controller sends a probe message to one or more devices; each device receives the probe message, obtains information in respect of its relative position with respect to the wireless controller, determines a response time to respond according to a first predefined rule, based on its relative position information: detects response signals from other devices before expiration of the response time; decides whether to send or not to send its response signal according to a second predefined rule and the detecting procedure of response signals from other devices; the wireless controller receives response signals sent by the devices after the comparison of the relative position information of each device with respect to the wireless controller, and selects the target devices from the devices. Embodiments of the present invention reduce the complexity, delay and energy consumption of the selection for wireless devices, and are especially applicable for wireless lighting systems.

A data communications system for communicating a data signal formed of successive data elements, said system comprising a transmission node; a reception node; and a link providing a data connection from said transmission node to said reception node; in which: said transmission node comprises a clock signal transmitter for transmitting a synchronisation clocking signal to said reception node via said link, said synchronisation clocking signal having synchronising features occurring at a frequency lower than a data element rate; an assembler for assembling elements of said data signal into data frames, each data frame having a plurality of successive data elements of said data signal, for transmission to said reception node via said link, said assembler being responsive to said synchronisation clocking signal so as to set a synchronisation flag associated with a data element having a first predetermined temporal relationship with a synchronising feature of said synchronisation clocking signal; and said reception node comprises: a detector detecting a synchronising feature of said synchronisation clocking signal received from said transmission node; a disassembler for disassembling received data frames to regenerate said data signal, said disassembler being operable to detect a data element associated with a set synchronisation flag; an output unit for outputting a data element associated with a set synchronisation flag at a second predetermined temporal relationship with respect to said synchronising feature of said received synchronisation clocking signal; said first and second predetermined temporal relationships being arranged so that a predetermined system latency exists between input of a data element to said transmission node and subsequent output of that data element by said reception node.

The invention discloses a method capable of dynamically regulating transmitting power. The method comprises obtaining power value of a received wireless signal, judging whether the power value is arranged in a preset threshold scope, the transmitting power is not regulated, or the transmitting power is regulated. The invention further discloses a device and an intelligent terminal capable of dynamically regulating the transmitting power. The technical scheme includes that the device and the intelligent terminal capable of dynamically regulating the transmitting power reduces power consumption and electromagnetic radiation of Bluetooth equipment under the condition that Bluetooth communication quality is ensured.

In a method of amplifying optical input signals over a wide bandwidth, the optical input signals are applied to an optical waveguide made from a rare-earth-doped amorphous material (e.g., erbium-doped yttrium aluminum oxide material). The optical input signals include optical signals having wavelengths over a range of at least 80 nanometers, and, preferably, over a range of at least 160 nanometers. Pump light is applied to the optical waveguide to cause the waveguide to provide optical gain to the optical input signals. The optical gain causes the optical signals to be amplified within the waveguide to provide amplified optical signals over the extended 80-160-nanometer range, including, in particular, optical signals having wavelengths at one end of the range and optical signals having wavelengths at a second end or the range.

A radiation-shielding attenuation structure and method of forming the attenuation structure, wherein the attenuation structure is made by additively manufacturing a concrete material that includes one or more attenuation dopants configured to enhance the radiation shielding of the concrete material. The one or more attenuation dopants may be configured in the concrete material to attenuate one or more types of radiation, such as electromagnetic radiation, gamma radiation, X-ray radiation, or neutron radiation. The attenuation structure formed by the concrete material may be additively manufactured on-site according to a model that has already been pre-certified for safe or secure use, thereby providing a repeatable and reproducible process that can reduce lead times and fabrication costs. The attenuation structure may be easily modified during the additive manufacturing process to have different concrete mixtures with different attenuation characteristics, which increases the tailorability and flexibility in design of the attenuation structure.

In a method of amplifying optical input signals over a wide bandwidth, the optical input signals are applied to an optical waveguide made from a rare-earth-doped amorphous yttrium aluminum oxide material (e.g., erbium-doped yttrium aluminum oxide material). The optical input signals include optical signals having wavelengths shorter than 1,520 nanometers and optical signals having wavelengths longer than 1,610 nanometers. Preferably, the wavelengths range from as short as approximately 1,480 nanometers to as long as approximately 1,650 nanometers. Pump light is applied to the optical waveguide to cause the waveguide to provide optical gain to the optical input signals. The optical gain causes the optical signals to be amplified within the waveguide to provide amplified optical signals over the extended range from approximately 1,480 nanometers to approximately 1,650 nanometers, including, in particular, optical signals having wavelengths shorter than 1,520 nanometers and optical signals having wavelengths longer than 1,610 nanometers. Alternatively, the wavelengths of the optical input signals may be in the range from approximately 1,480 nanometers to approximately 1,565 nanometers. As a further alternative, the wavelengths of the optical input signals may be in the range from approximately 1,565 nanometers to approximately 1,650 nanometers.

Electromagnetic-energy absorbing materials are combined with thermally conductive materials, such as those used for thermal management in association with electronic equipment, thereby suppressing the transmission of electromagnetic interference (EMI) therethrough. Disclosed are materials and processes for combining EMI-absorbing materials with thermally conductive materials thereby improving EMI shielding effectiveness in an economically efficient manner. In one embodiment, a thermally conductive EMI absorber is prepared by combining an EMI-absorbing material (for example, ferrite particles) with a thermally conducting material (for example, ceramic particles), each suspended within an elastomeric matrix (for example, silicone). In application, a layer of thermally conductive EMI-absorbing material is applied between an electronic device or component, and a heat sink

Systems and methods for programming pluggable transceivers are provided. In an embodiment, a method includes receiving RFID data from an RFID device in proximity to a network transceiver via an RFID antenna in the network transceiver, said RFID data defining an operating configuration of the network transceiver; and programming the network transceiver according to the operating configuration defined by the received RFID data. In an embodiment, a network transceiver includes: a host interface for connecting to a host; a network interface for transmitting and receiving signals to and from a network; an RFID antenna for receiving RFID data; and a controller in operative communication with the network interface and the RFID antenna, said controller operating the network interface according to an operating configuration, wherein the operating configuration of the controller is programmed using the RFID data received via the RFID antenna. Various other embodiments are also provided.

The disclosure relates to an electronic component assembly including at least one SMD component (11) having a number of external surfaces (111) limited by edges (112) and at least two electrical terminals (113), an electromagnetic screen (12) for limiting the electromagnetic coupling to and from the SMD component or components, and an electrically insulating layer (13) located between at least one of the surfaces and the electromagnetic screen. The disclosure furthermore relates to a method of manufacturing an electronic component assembly and to the use of an electronic component assembly.

An improved structure of a cable featuring an enhanced shield layer, with the arrangement comprised of a conductor, an insulation layer, a metal braid layer, an outer jacket, and an enhanced shield layer disposed between the insulation layer and the metal braid layer. The enhanced shield layer can be conductive plastic, conductive carbon black, conductive colorant, conductive coating, conductive metallic powder, or metal fiber, any of which eliminates electrostatic noise generated by a variety of causes in audio / video cables and thereby solves the problem of electrostatic discharge

Disclosed is a system and method employing a magnetic proximity switch to enable the transfer of power between a power supply unit and a docking unit or to transfer data between a docking unit and a peripheral module such as a disk drive or controller module. Power may be transferred through the switch, or a signal from the switch may be employed to enable a control circuit. The control circuit may control a plurality of voltages or currents and may ramp voltages or currents to limit surge current when a module is installed or removed. The control unit may also be employed to place data and control signals in a high impedance state when a module is not docked, limiting electromagnetic radiation.

The invention provides a test system of a hybrid electric vehicle, which belongs to the technical field of automobile electronics. The test system overcomes the defects of more test personnel, large data acquisition workload, complex operation, large measurement error and the like in the existing method adopting manual monitoring and testing. The test system of the hybrid electric vehicle comprises a CAN bus and a PC machine, wherein the CAN bus is provided with a plurality of nodes; the PC machine is connected with the CAN bus; the PC machine comprises a central processing unit, and a message resolving module, a memorizer and a display which are connected with the central processing unit; a data acquisition module is connected between the CAN bus and the message resolving module; and the data acquisition module is used for acquiring information of each node from the CAN bus and displaying the information on the display after the resolution by the message resolving module. The test system of the hybrid electric vehicle can accelerate research and development, can quickly detect the state and display the fault, and has the advantages of high speed, low electromagnetic radiation, anti-electromagnetic interference, cost saving and the like.

A spread-spectrum clock signal generator comprises a circuit loop receiving a reference signal at a reference frequency and adapted to generate an output signal at an output frequency dependent on and locked to the reference frequency, and a modulator circuit generating a modulation signal at a modulation frequency; the modulation signal is injected into the circuit loop to induce a modulation of the frequency of the output signal with respect to the frequency dependent on the reference frequency. The circuit loop is a frequency-locked loop and has a bandwidth sufficiently higher than the modulation frequency, so that the output frequency tracks the modulation signal. Frequency-offset correction means are further provided, for evaluating a frequency offset between an average frequency of the output signal and the frequency dependent on the reference frequency, and for generating a frequency-offset correction signal which is injected into the circuit loop for correcting the evaluated frequency offset.

A garment and method for reducing electromagnetic radiation produced by a transmitting device typically located inside a body. The garment may include material to prevent or lower electromagnetic radiation. A method for using such a garment to lower electromagnetic emissions is described.

A system and method are presented for generating a localized audible sound field at a designated spatial location. The method comprises: providing sound-data indicative of an audible sound to be produced and location-data indicative of a designated spatial location at which the audible sound is to be produced; and utilizing the sound-data and determining frequency content of at least two ultrasound beams to be transmitted by an acoustic transducer system including an arrangement of a plurality of ultrasound transducer elements for generating said audible sound. The at least two ultrasound beams include at least one primary audio modulated ultrasound beam, whose frequency contents includes at least two ultrasonic frequency components selected to produce the audible sound after undergoing non-linear interaction in a non linear medium, and one or more additional ultrasound beams each including one or more ultrasonic frequency components. The location-data is utilized for determining at least two focal points for the at least two ultrasound beams respectively such that focusing the at least two ultrasound beams on the at least two focal points enables generation of a localized sound field with the audible sound in the vicinity of the designated spatial location.

A power supply for a Light Emitting Diode (LED) traffic signal that controls the light intensity. The light intensity conforms to a predetermined pattern based on the input voltage root mean square value (Vrms). The input voltage is changed by acting on the amplitude of the sine wave or by using a triac and controlling the angle of fire. The power supply comprises a fuse module, an electromagnetic compatibility filter module, a power supply module, a LED load module, a current monitor module, a RMS-DC conversion module and a fuse blow out module.

The invention discloses an energy transmitting terminal and an energy wireless transmission method, and relates to the technical field of energy wireless transmission. According to the energy transmitting terminal and the energy wireless transmission method, the optimal segmentation energy transmitting coil is selected according to location information of the energy transmitting terminal, the coefficient of coupling between the segmentation energy transmitting coil and a receiving coil can be increased, the energy transmission efficiency is improved, and electromagnetic radiation received by a patient is reduced; due to the fact that energy supply can be carried out through a portable lithium battery, the patient can be more free.

The invention discloses a multiband wireless terminal antenna, mainly solving the problems that the antenna in the prior art can not meet the requirements of people for miniaturization, high accuracy and convenience in use. The multiband wireless terminal antenna comprises a shell, a printed board and a printed board metal floor and also comprises a high-frequency resonance metal strip group, a low-frequency resonance metal strip group, a microstrip feeder and a stop band, wherein the printed board is arranged in the shell; the printed board metal floor is arranged on one surface of the printed board; the high-frequency resonance metal strip group is arranged on the other surface of the printed board; the low-frequency resonance metal strip group corresponds to the high-frequency resonance metal strip group; the microstrip feeder is connected with the end part of the high-frequency resonance metal strip group; the stop band is connected between the high-frequency resonance metal strip group and the microstrip feeder; and a coupling gap is arranged between the high-frequency resonance metal strip group and the low-frequency resonance metal strip group. By the scheme, the multiband wireless terminal antenna has the advantages that the purposes of small volume, high accuracy and convenience in use are achieved and the practical and promotional values are high.