Abstract: Disclosed is an electronic document, such as an integrated circuit card, that includes a body having a cavity that opens into one of the faces of the body and is defined by walls. The body also includes: an antenna having at least one turn extending between two ends that terminate in a wall of the cavity, a module including a microprocessor and at least two connection terminals dedicated to the antenna and electronically connected by electrical connections firstly to the microprocessor and secondly to the ends of the antenna. The ends of the antenna are arranged in zigzag shapes and each of them is made up of at least two rectilinear portions that are connected together by a bend and in which the rectilinear portion terminating in the cavity is at an angle of inclination relative to the wall at which it terminates.

Abstract: An antenna device of an electronic apparatus, according to embodiments of the present invention, includes radiation patterns comprising: at least one open boundary; and a plurality of radiation sections having the open boundary placed and arranged therebetween, wherein the radiation pattern forms a resonant frequency in a first frequency band (hereinafter, referred to as “a first resonance frequency”) and at least one among the radiation sections can form a resonant frequency in a second frequency band (hereinafter, referred to as “a second resonant frequency band”) higher than the first resonant frequency. The antenna device of the electronic apparatus, according to the present invention, can be implemented through other various embodiments.

Abstract: Example apparatuses and methods relating to antennas are provided. An example apparatus in the form of an antenna assembly includes a first conductor structurally formed into a plurality of first conductor structural waves and a second conductor structurally formed into a plurality of second conductor structural waves. The first conductor and second conductor may be helically wound to form a bifilar helix structure having a proximal end and a distal end. The first conductor and the second conductor may be operatively coupled at the proximal end of the bifilar helix structure to form a signal feed point, and the first conductor and the second conductor are operatively coupled at the distal end of the bifilar helix structure to form a load point.

Abstract: A multi-mode, multi-band antenna system for a handheld wireless device includes a Quadrafilar Helix Antenna (QHA) that radiates circularly polarized waves is fed by a co-axial cable. The co-axial cable is also used in combination with the QHA as a monopole antenna. Because of the distinct electromagnetic field patterns of the QHA versus the combination of the QHA and the co-axial cable operating as a monopole antenna, the cross coupling between the two modes is low. In certain embodiments the co-axial cable can itself be formed into a helix in order to reduce the physical length of the antenna system while maintaining an electrical length desired to supported certain frequency bands in the monopole mode. According to certain embodiments a post which also serves to increase the effective electric length of the co-axial cable and thereby support a lower frequency band is provided along the centerline of the QHA.

Abstract: To ensure a sufficient communication distance and to concurrently suppress a conductor loss, a coil antenna includes a magnetic core including a first peripheral surface including at least a first principal surface, a first coil conductor located on the first principal surface and wound around a predetermined winding axis, a first base material layer stacked on the first principal surface, including at least a first surface parallel or substantially parallel to the first principal surface, and made of a material having a lower magnetic permeability than the magnetic core, and a second coil conductor located on at least the first surface. Opposite ends of the second coil conductor are coupled to the first coil conductor on the first principal surface, and a direction in which a current flows through the first coil conductor on the first principal surface is substantially the same as a direction in which a current flows through the second coil conductor on the first surface.

Abstract: A light bulb or other lamp device incorporating improved antenna configurations and integrated networking equipment is described herein. In one example, a LED light bulb is arranged to include a wireless transceiver and related wireless network processing circuitry, and is coupled to multiple antennas configured to receive and transmit signals using spatial diversity, beamforming, multiple-input and multiple-output (MIMO), or other multi-antenna techniques. The heat sink in the light bulb may be purposed to provide one or more of the multiple antennas, such as use of respective heat sink structures to serve as a diversity antenna. The wireless network processing circuitry may be used for control of the light bulb or for operability with wireless and non-wireless networks. For example, the network processing circuitry may operate as a wireless network access point, repeater, relay, bridge, or like function.

Abstract: A segmented helical antenna can include: a plurality of unit arms, each unit arm having a center hole, a first end hole, and a second end hole; a central axis passing through the center hole of the plurality of unit arms; a first wire passing through the first end hole of each of the plurality of unit arms; and a second wire passing through the second end hole of each of the plurality of unit arms. Each unit arm can be configured to be rotatable such that the first wire and the second wire rotate clockwise or counterclockwise.

Abstract: A wireless communication module and a wireless communication device that are less likely to become detached even when attached to a flexible base substrate and have a reduced height includes a flexible multilayer substrate including a plurality of stacked flexible base materials and a cavity provided therein, a wireless IC chip arranged in the cavity, and a sealant filled in the cavity so as to cover the wireless IC chip. The sealant is a material that is harder than the flexible base materials. The flexible multilayer substrate includes a loop-shaped electrode defined by coil patterns. The loop-shaped electrode is electrically connected to the wireless IC chip.

Abstract: In an example, an apparatus can include an implantable medical device comprising a housing, an implantable telemetry circuit carried within the housing, a dielectric compartment mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions and a third face portion extending between the first and second face portions, and an implantable telemetry antenna, located at least partially within the dielectric compartment. The implantable telemetry circuit can be electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna. In an example the implantable telemetry antenna comprises a spiral conductor portion extending along the first, second, and third face portions. In an example the spiral conductor includes a cross section having a lateral width that can be greater than a sidewall height of the cross section.

Abstract: An apparatus includes a sensor that receives a first electrical signal and provides a second electrical signal in response to the first electrical signal. The second electrical signal is based on at least one parameter monitored by the sensor. The apparatus also includes an antenna that converts first wireless signals into the first electrical signal and that converts the second electrical signal into second wireless signals. The antenna includes a substrate, conductive traces, and conductive interconnects. The conductive traces are formed on first and second surfaces of the substrate. The conductive interconnects couple the conductive traces, and the conductive interconnects and the conductive traces form at least one helical arm of the antenna. The conductive traces could be formed in various ways, such as by etching or direct printing. The conductive interconnects could also be formed in various ways, such as by filling vias in the substrate or direct printing.

Abstract: An exemplary embodiment of an multiband antenna assembly includes a printed circuit board having a plurality of elements thereon. The plurality of elements may include a radiating element, a matching element, a feed element configured to be operable as a feeding point for the multiband antenna assembly, and a shorting element configured to be operable for electrically shorting the radiating element to ground. The antenna assembly may be operable within at least a first frequency range and a second frequency range different than the first frequency range without requiring any matching lump components coupled to the printed circuit board.

Abstract: A hearing aid includes a hearing aid housing and an antenna device constructed to receive and/or transmit electromagnetic waves having a predetermined wavelength lambda. The antenna device has a frame incorporated in the hearing aid housing for holding assemblies of the hearing aid and the frame has an electrically conductive structure being an integral part of the frame. A method for producing a hearing aid includes patterning a surface of the frame, applying an electrically conductive layer to the surface of the frame and incorporating the frame into the hearing aid housing.

Abstract: The invention relates to a method of automatic adjustment of a single-input-port and single-output-port tunable matching circuit, for instance a single-input-port and single-output-port tunable matching circuit coupled to an antenna of a radio transceiver. The invention also relates to an automatic tuning system using this method. The reactance of each adjustable impedance device of the tunable matching circuit is determined by at least one tuning control signal. In addition to the begin symbol and the end symbol, a flowchart of a tuning sequence comprises: a process generating initial values of the tuning control signals, which uses an open-loop control scheme using one or more real quantities depending on an impedance seen by the target port; and a process generating subsequent values of the tuning control signals, which uses a closed-loop control scheme and an extremum-seeking control algorithm.

Abstract: A quadrifilar helix antenna includes a cylindrical support extending along an antenna axis; a plurality of spiral conductors wrapped helically on the cylindrical support and along the antenna axis from a feed end to a remote end; a circular ground plane perpendicular to the antenna axis; and each of the spiral conductors including a plurality of gaps, with the gaps having capacitors between conducting portions of the spiral conductors. The capacitors are positioned higher than 60 mm above the ground plane, and capacitance value varies inversely with height. The antenna exhibits a DU(10°)=?20 dB or better at an operating frequency f0=1575 MHz. The diameter of the cylindrical support is 30+/?5 mm. A total height of the cylindrical support is 300+/?50 mm. A winding angle of the helix is variable.

Abstract: An electronic circuit includes: a substrate having an electromagnetic band gap structure formed including a ground conductor and a first conductor that includes multiple conductor plates, the conductor plates being arranged on a first surface, and at least a portion of the ground conductor being arranged on a second surface; and a second conductor that is arranged at a distance from and rearward of the conductor plates in a view from the second surface of the substrate, is connected to the ground conductor, and is electromagnetically coupled to at least a portion of the conductor plates.

Abstract: A dual-band antenna disposed on the both sides of a substrate, including: a substrate, a first radiator and a second radiator. The substrate includes a first surface and a second surface; a feeding point is disposed at the edge of the first surface which may have a penetration hole electrically connected the first surface to the second surface. The first radiator extends from the first direction of the feeding point to the edge of the substrate, bend at the first corner, continues to extend toward the edge of the substrate, bends again at the second corner and then extend toward the third corner along the edge of the substrate. The second radiator straightly extends toward the second direction of the feeding point and the second direction's projection on the first surface is vertical to the first direction.

Abstract: An antenna assembly includes a bobbin positionable about an outer surface of a tool mandrel and providing an outer bobbin surface. A coil is wrapped about and extends longitudinally along at least a portion of the outer bobbin surface. An inner sleeve interposes the bobbin and the tool mandrel and receives a plurality of ferrites that interpose the tool mandrel and the coil.

Abstract: A band-notched spiral antenna having one or more spiral arms extending from a radially inner end to a radially outer end for transmitting or receiving electromagnetic radiation over a frequency range, and one or more resonance structures positioned adjacent one or more segments of the spiral arm associated with a notch frequency band or bands of the frequency range so as to resonate and suppress the transmission or reception of electromagnetic radiation over said notch frequency band or bands.

Abstract: An antenna assembly includes a bobbin positionable about an outer surface of a tool mandrel, and a coil wrapped about an outer bobbin surface of the bobbin and extending longitudinally along at least a portion of the outer bobbin surface. A plurality of ferrites are positioned within a groove defined in the outer surface of the tool mandrel, and the plurality of ferrites extend circumferentially about the outer surface and interpose the tool mandrel and the coil.

Abstract: A broadband quadruple helical circularly-polarized antenna for receiving GNSS signals comprises an excitation circuit and a set of quadruple spiral elements. Each quadruple spiral element consists of four conductors. Each conductor is a one spiral turn of the quadruple spiral element. Said conductors have equal winding angle. The winding angle of all conductors does not change in the same quadruple spiral element. Conductors of neighboring (longitudinally) quadruple spiral elements have different winding angles. The antenna provides a sharp drop in AP at angles near the horizon and a small AP level in the lower hemisphere.

Abstract: A power supply coil is disposed on a rear surface of a display via a shield plate. When a current flows in the power supply coil, a magnetic flux emitted from the power supply coil traverses an opening of the shield plate. As a result, the power supply coil and the shield plate are electromagnetically coupled and the shield plate defines and functions as an antenna. Accordingly, a communication terminal communicates favorably with a smartcard, which is a device positioned on a front surface side of the display.

Abstract: A configurable segmented antenna is described herein. A monitor component can be configured to detect at least one parameter corresponding to one or more segments of an antenna integrated with a communications device. An antenna component can be configured to select at least one segment of the one or more segments in response to the at least one parameter. A control component can be configured to modify a quality of a signal according to the at least one parameter. Further, a transmission component can be configured to transmit the signal from the at least one segment based on the quality.

Abstract: A planar conductor including a cutout that penetrates in a thickness direction and extends from an outer edge portion toward an inner side, a coil antenna magnetically coupling with the planar conductor by a magnetic flux passing through the cutout, and a fit-in member filled into at least a portion of the cutout and including a metal oxide film provided on at least a side surface portion thereof which is in contact with the planar conductor, are included. Thus, an antenna device which does not impair appearance while maintaining strength by using a metal casing, and a communication apparatus including the antenna device, are provided.

Abstract: The present invention relates to a magnetic sheet, a wireless charging sheet, and a method for manufacturing a magnetic sheet. According to an embodiment of the present invention, a magnetic sheet used in a wireless charging sheet, which includes a metal sheet layer consisting of a plurality of divided segments; and an insulating material filled in a dividing space between the segments and forms a magnetic path of a magnetic field generated around a coil, is provided. Further, a wireless charging sheet and a method for manufacturing a magnetic sheet are provided.

Abstract: An integrated wire elliptical helical antenna with novel cuboids dielectric resonator loading for circularly polarized wave transmission and reception is presented. The antenna is designed to operate in the center frequency of 915 MHz and it is utilized in RFID systems as a base station antenna. The elliptical structure is formed by steel wire and supporting acrylic plastic. The cuboids dielectric resonator is loaded at the inner surface of the proposed antenna.

Abstract: A smart tag assembly is designed for mounting on an object to be tracked. The smart tag assembly comprises a multiple layer RFID laminate adapted for electronically storing and processing data, and wireless communicating data when interrogated by an RFID reader. The laminate comprises an RFID inlay including a microchip and antenna formed with a substrate, and laminated between an outside label cover and backing. A low-profile tag carrier defines a recessed pocket designed for receiving and holding the RFID laminate, and has a generally concave outside surface adapted for residing against a generally convex surface of the object to be tracked.

Abstract: A configurable segmented antenna is described herein. A monitor component can be configured to detect at least one parameter corresponding to one or more segments of an antenna integrated with a communications device. An antenna component can be configured to select at least one segment of the one or more segments in response to the at least one parameter. A control component can be configured to modify a quality of a signal according to the at least one parameter. Further, a transmission component can be configured to transmit the signal from the at least one segment based on the quality.

Abstract: An antenna device includes a first coil wound in one direction and a second coil disposed adjacent to the first coil and wound in a direction opposite to the winding direction of the first coil and having conductor openings at the centers of wound coils, and a magnetic core. The magnetic core is inserted into the conductor opening of the first coil and the conductor opening of the second coil. A portion of a conductor line forming the first coil positioned farther away from the second coil than a portion of the conductor line forming the first coil positioned closer to the second coil, and a portion of a conductor line forming the second coil positioned farther away from the first coil than a portion of the conductor line forming the second coil positioned closer to the first coil, are disposed along the first main surface of the magnetic core.

Abstract: The disclosure provides an antenna device and mobile terminal including such an antenna device. The antenna device includes a coil including a conductor wound around a plate-shaped magnetic core. A flat conductor is positioned adjacent to the coil, and the coil is positioned such that it is closer than the flat conductor to an antenna of a communication partner positioned near the antenna device. The coil conductor includes a first conductor portion adjacent to a first main surface of the magnetic core and a second conductor portion adjacent to a second main surface thereof. The magnetic core and the coil conductor form an antenna coil. A circuit substrate includes a ground electrode formation area and a ground electrode non-formation area. The antenna coil is mounted on the ground electrode non-formation area of the circuit substrate with the first main surface of the magnetic core facing the circuit substrate.

Abstract: A broad-band circularly-polarized antenna is presented. The circularly-polarized antenna includes at least four monopole antenna elements having respective at least four radiating surfaces with respective at least four normals. The monopole antenna elements are arranged around a vertical axis. The normals of the respective radiating surfaces are perpendicular to and point away from the vertical axis. The broad-band circularly-polarized antenna includes at least one feed network communicatively coupled to edge portions of the at least four monopole antenna elements. A first antenna element is driven with a first driving phase offset by 90 degrees from a second driving phase used to drive a second antenna element. The second driving phase is offset by 90 degrees from a third driving phase used to drive a third monopole antenna element. The third driving phase is offset by 90 degrees from a fourth driving phase used to drive a fourth antenna element.

Abstract: A system having a UHF RFID transceiver is adapted to communicate exclusively with a single electro-magnetically coupled transponder located in a predetermined confined transponder operating region. The system includes a near field coupling device comprising a plurality of lines connected in parallel with an unmatched load. The near field coupling device may be formed, for example on a printed circuit board with a plurality of electrically interconnected traces and a ground plane. The system establishes, at predetermined transceiver power levels, a mutual electro-magnetic coupling which is selective exclusively for a single transponder located in a defined transponder operating region. Also included are methods for selective communication with the transponder in an apparatus such as a printer-encoder.

Abstract: A multi-use antenna system that can be used in, for example, integrated communications and navigation capability is provided. In an embodiment, an antenna system is provided. The antenna system includes a first antenna having a plurality of radiating elements substantially wrapped around an axis and a second antenna located within the first antenna. The first and second antennas are coupled to the same ground plane and are configured to operate in different frequency bands.

Abstract: A spiral antenna device includes a plurality of generally polygonal loops. The polygonal loops have respective side counts that decrease progressively as a function of the loop's radial distance from a center of the antenna device. The side count may vary between loops as a multiple of a power of two.

Abstract: Disclosed are a shielding apparatus and a wireless power transmission apparatus. The shielding apparatus included in a wireless power transmission apparatus for transmitting power to a wireless power reception apparatus in wireless includes a first shielding unit changing a transmission path of a portion of a magnetic field generated from a transmission coil of the wireless power transmission apparatus, and a second shielding unit shielding the portion of the magnetic field which has passed through the first shielding unit. The second shielding unit is placed on the first shielding unit. A real component value of permeability of the first shielding unit is greater than an imaginary component value of the permeability of the first shielding unit, and an imaginary component value of permeability of the second shielding unit is greater than a real component value of the permeability of the second shielding unit.

Abstract: An antenna system with a sharp difference in directional pattern is intended for receiving GNSS signals. The antenna system includes at least two antenna elements located above a high-impedance capacitive ground plane, and a combining network. Antenna elements are spaced apart in vertical direction. The combining network provides subtraction of the signal reflected from the ground, the arrangement of antenna elements above the high-impedance capacitive ground plane making such subtraction efficient.

Abstract: Subject matter such as a method or apparatus can include an implantable antenna assembly, comprising a dielectric shell including first and second substantially parallel outer face portions, and a third outer face portion extending between the first and second portions, a spiral conductor extending along the first, second, and third portions on a surface of the dielectric shell. The dielectric shell and spiral conductor can be configured to be mechanically attached to a dielectric compartment, such as configured to be coupled to a housing of an implantable medical device. In an example, the implantable antenna assembly is configured to be electrically coupled to an implantable telemetry circuit configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna, such as included as a portion of an implantable medical device.

Abstract: Techniques for reducing resonance in contact fingers of a connector are described herein. An example of a device in accordance with the present techniques includes an add-in-card that includes a circuit board and an edge contact finger disposed on an outer surface of the circuit board. The add-in-card also includes a resonator disposed in an internal layer of the circuit board and coupled to the edge contact finger, wherein the resonator reduces a resonance in the edge contact finger.

Abstract: A configurable segmented antenna is described herein. A monitor component can be configured to detect at least one parameter corresponding to one or more segments of an antenna integrated with a communications device. An antenna component can be configured to select at least one segment of the one or more segments in response to the at least one parameter. A control component can be configured to modify a quality of a signal according to the at least one parameter. Further, a transmission component can be configured to transmit the signal from the at least one segment based on the quality.

Abstract: A reconfigurable antenna structure includes first and second reconfigurable antennas, a configuration module, and an antenna processing circuit. The first reconfigurable antenna is configured, in response to a first configuration signal, to have a first radiation pattern and to have a first frequency bandwidth and the second reconfigurable antenna is configured, in response to a second configuration signal, to have a second radiation pattern and to have a second frequency bandwidth. The configuration module is configured to generate the first and second configuration signals. The antenna processing circuit is configured to send one or more transmit signals to one or more of the first and second reconfigurable antennas for transmission via one or more of the channels of interest and receive one or more receive signals from the one or more of the first and second reconfigurable antennas.

Abstract: Multi-use antenna techniques are described. In one or more implementations, a device includes a single fixed radiating structure, a first branch coupled to the single fixed radiating structure to tune to a first frequency range to support a first wireless signal technique, and a second branch coupled to the single fixed radiating structure to tune to a second frequency range to support a second wireless signal technique, the second frequency range being different than the first frequency range.

Abstract: A two-arm delta mode spiral antenna includes a dielectric substrate having an upper side, a lower side, and an outward edge. A flat top cone with cylinder sidewall is attached to the lower side of the dielectric substrate, forming a scalable feed cavity. Two spiraling conductive radiator arms are mounted on the dielectric substrate. A magic-T is electrically connected to the two spiraling conductive radiator arms.

Abstract: A photoconductive switch comprising a photoconductive material and first and second contacts provided on said photoconductive material, wherein said first and second contacts comprise a plurality of interdigitated tracks, the tracks of each contact being separated from the tracks of the other contact by a photoconductive gap, the tracks being curved such that the minimum photoconductive gap measured in a first direction remains substantially similar regardless of the orientation of the first direction.

Abstract: The present invention relates to an antenna assembly for transmitting and receiving electromagnetic waves. More particularly, this invention relates to a wideband and multiband omnidirectional antenna assembly for sending and receiving radio waves. Specifically, this invention relates to a radiative antenna element formed by way of a single-fed spiraled sheet of conductive material. The conductive material is interlaced with a dielectric material to form the radiative element. The radiative element includes a height of substantially less than ¼ of the characteristic wavelength of the lowest operating frequency.

Abstract: Disclosed are systems and methods for reducing filter insertion loss while maintaining out-of-band attenuation. In some embodiments, a system can be configured for processing of radio-frequency (RF) signals. The system can include a plurality of signal paths configured to accommodate multiple frequency bands, with each of the multiple bands having a passband. The system can further include a filter circuit disposed along each of the signal paths. At least one of the filter circuits can be segmented into two or more segments that substantially cover the passband corresponding to the filter circuit. The segmented filter circuit can be configured to provide a desired attenuation of out-of-band interferers and a desired insertion loss level. In some embodiments, the signal paths can include receive (Rx) paths.

Abstract: A RFID tag (500) includes an antenna (100) that includes a first dipole (110), a first feeder portion (130), a second dipole (120) and a second feeder portion (140). The first feeder portion is coupled to the first dipole at two locations a feeder length distance apart. The second feeder portion is coupled to the second dipole at two locations the feeder length distance apart. The feeder portions are also coupled to an antenna terminal (150). Impedance at the antenna terminal is determined, at least in part, by the feeder length distance. Each of two end portions of the first dipole distal from the first feeder portion is connected to a respective corresponding end portion of the second dipole distal from the second feeder portion, the first and second dipoles thereby forming a rectangle. The antenna is symmetrical about both a major and a minor axis of the rectangle.

Abstract: A dipole antenna in accordance with the present invention includes a first antenna element provided in a two-dimensional surface and having a linear shape and a second antenna element provided in the two-dimensional surface and having a spiral shape that circles around the first antenna element.

Abstract: A near field RFID system includes an RFID reader and an RFID tag. The RFID reader includes a transmit path and a receive path, wherein the transmit path includes: an encoding section coupled to convert data into encoded data; a digital to analog conversion module coupled to convert the encoded data into an analog encoded signal; a power amplifier coupled to amplify the analog encoded signal; and a plurality of coils coupled to generate a plurality of electromagnetic fields from the analog encoded signal. The RFID tag that includes: a coil coupled to generate a current and a recovered signal from at least one of the plurality of electromagnetic fields; a power recovery circuit coupled to generate a voltage from the current; and a data processing section coupled to process the recovered signal, wherein the data processing section is powered via the voltage.

Abstract: A configurable segmented antenna is described herein. A monitor component can be configured to detect at least one parameter corresponding to one or more segments of an antenna integrated with a communications device. An antenna component can be configured to select at least one segment of the one or more segments in response to the at least one parameter. A control component can be configured to modify a quality of a signal according to the at least one parameter. Further, a transmission component can be configured to transmit the signal from the at least one segment based on the quality.

Abstract: Provided are a method and apparatus for controlling a resonance bandwidth in a wireless power transmission system. The apparatus may include a source resonator to transfer an electromagnetic energy to a target resonator, and a source resonance bandwidth setting unit to set a resonance bandwidth of the source resonator.

Abstract: There is provided a plasma processing apparatus including a processing chamber having a dielectric window; a substrate holding unit for holding thereon a processing target substrate within the processing chamber; a processing gas supply unit configured to supply a processing gas into the processing chamber in order to perform a plasma process on the substrate; a RF antenna provided outside the dielectric window in order to generate plasma of the processing gas within the processing chamber by inductive coupling; and a high frequency power supply unit configured to supply a high frequency power having a frequency for generating a high frequency electric discharge of the processing gas. Here, the RF antenna includes a plurality of coil segments that are arranged along a loop having a preset shape and a preset size while electrically connected in parallel to each other.