摘要:
Techniques are described for wireless energy transmission and projecting magnetic fields over relatively long near-fields. In one example, a device for transmitting near-field energy comprises at least one source that generates a radiofrequency (RF) signal, an antenna that generates near-field signals from the RF signal, and a plurality of sub-wavelength sized elements that form a lens in communication with the antenna that captures the near-field signals, generates near-field energy, and re-directs the near-field energy toward an object in the near-field of the lens, where the sub-wavelength sized elements are disposed about the antenna.
摘要:
"A method, apparatus and system for networking accessories to a firearm or weapon wherein the accessories are inductively powered from the rail and data is transferred between the accessories and the rail via inductive coupling. In one embodiment, a weapon is provided, the weapon having: an upper receiver, a lower receiver; a powered accessory mounted to a rail of the upper receiver; and an apparatus for inductively networking a microcontroller of the powered accessory to a microcontroller of the upper receiver and a microcontroller of the lower receiver, wherein the data is exclusively provided to the powered accessory from one of a plurality of coils located within the rail; and wherein the powered accessory further comprises a plurality of coils and the powered accessory is configured to determine when one of the plurality of coils of the powered accessory is adjacent to the one of the plurality of coils of the rail".
摘要:
The invention provides an antenna which can be configured to use s selected number of coils but for the same operating frequency. This enables a desired (and adjustable) compromise to be found between power consumption and signal strength.
摘要:
This disclosure relates to a signal processing device, a signal processing method, and a receiving device that are capable of detecting response information at a high degree of accuracy from a carrier signal that is load-modulated based on the response information. A positive DC generating unit 61 generates a positive threshold based on a load-modulated carrier signal. A positive selecting unit 62 compares the voltage of the carrier signal with the positive threshold, and outputs the value of the larger one to an adding unit 65. A negative DC generating unit 63 generates a negative threshold based on the load-modulated carrier signal. A negative selecting unit 64 compares the voltage of the carrier signal with the negative threshold, and outputs the value of the smaller one to the adding unit 65. The adding unit 65 adds the output of the positive selecting unit 62 and the output of the negative selecting unit 64, and outputs the addition result to an IQ detecting unit 53. As a result of the combining, a signal that has smaller Vpp than that of the original carrier signal and maintains the fluctuation portions of the voltage is obtained. This disclosure can be applied to non-contact communication systems.
摘要:
Embodiments of an implantable medical device includes a loop antenna wound about an inner housing. The loop antenna may form a partial winding, a complete winding, or multiple windings about the inner housing. One or more additional antennae may be capacitively coupled to the loop antenna external to the inner housing to increase efficiency and decrease Return Loss Response of the implantable device. The additional antenna may be balanced or unbalance antennae.
摘要:
The invention relates to a transmission system for transmitting signals between an inner and an outer unit separated by an annular pipe section wall, wherein said inner unit is provided with a first antenna and the second unit is provided with a second antenna, the antennas preferably constituted by coils, being adapted to be brought into essentially the same positions along the pipe section, wherein said pipe section is made from a material having low magnetic permeability and wherein at least one of the antennas is provided magnetic shield having high magnetic permeability, the corresponding antenna being positioned between the pipe wall and the magnetic shield and the magnetic shield extending along the length of the antenna.
摘要:
Provided is an electronic circuit system that reduces at least one of a constraint on a positional relation between two electronic circuit devices and a constraint on the number and an arrangement of coils included in each device, when close-coupled wireless communication is established. In the electronic circuit system, wireless communication utilizing inductive coupling between antennas is established between first and second electronic circuit devices. The second electronic circuit device includes an electronic circuit, a plurality of antennas, a connection information generation unit and a connection switching unit. The connection information generation unit selects one of the plurality of antennas to be paired with an antenna included in the first electronic circuit device for use in wireless communication, and the connection switching unit switches one or more of the plurality of antennas to be connected to the electronic circuit.
摘要:
An antenna apparatus (101) includes a power supply coil (8), a booster electrode sheet (7), a magnetic sheet (6), and a ground substrate (5) in this order from the top. The power supply coil (8) is obtained by forming a spiral coil conductor (81) on a flexible substrate (80). The booster electrode sheet (7) is obtained by forming a booster electrode (71) on an insulating substrate (70). The booster electrode (71) includes a conductor region covering the coil conductor (81), a conductor aperture (CA) covering a coil window (CW), and a slit portion (SL1) connecting the outer edge of the conductor region and the conductor aperture (CA) in plan view. The magnetic sheet (6) covers the booster electrode sheet (7) so that the magnetic sheet (6) covers a region slightly larger than a region including the conductor aperture (CA) and the slit portion (SL1) of the booster electrode (71).
摘要:
A NFC communicator or NFC communications enabled device (100) has a data store (108) to store data, an inductive coupler (102) to couple inductively with the magnetic field of a radio frequency signal and a signal supplier (109) to supply a radio frequency signal to the inductive coupler. A modulator (110) is provided to modulate a radio frequency signal in accordance with data and a demodulator (114) is provided to extract data from a modulated radio frequency signal inductively coupled to the coupler. A controller (107) enables the NFC communicator or NFC communications enabled device both to initiate near field radio frequency communication with another near field RF communicator and to respond to near field radio frequency communication initiated by another near field RF communicator. The inductive coupler (102) has an antenna (120) and a variable impedance element (200) and the controller (107) is operable to control the variable impedance element (200) to control a magnetic field strength associated with a radio frequency signal supplied by the signal supplier.
摘要:
The invention relates to a system for storing and exchanging data, that comprises a functional module (100) defining a data medium capable of emitting or receiving data by inductive coupling. According to the invention, the functional module includes a common portable medium (50) on or in which are grouped at least one integrated circuit without passive contact (CIC) electrically supplied by an inductive coupling in the form of a first semi-conductor chip, and a contactless integrated circuit reader (NFRC) in the form of a second semi-conductor chip, an antenna coil (AC1) of the integrated circuit (CIC), and an antenna coil (AC2) of the reader (NFCR), wherein the antenna coil (AC1) of the integrated circuit (CIC) is coupled to the antenna coil (AC2) of the reader (NFCR).