Abstract: A loop antenna includes a ground plane and a conductive element with a first C-shaped element portion having an open end and a closed end, with only the open end extending directly above a first portion of the ground plane, a second C-shaped element portion having an open end and a closed end, with only the open end extending directly above a second portion of the ground plane, and a transmission line element disposed between the first C-shaped element portion and the second C-shaped element portion and positioned directly above a third portion of the ground plane.

Abstract: Receive and transmit antennas for wireless power. The antennas are formed to receive magnetic power and produce outputs of usable power based on the magnetic transmission.

Abstract: Provided is an antenna for a Radio Frequency Identification (RFID) reader using an electrical loop. It includes an upper metal plate which functions as a radiator; a lower metal plate which is disposed apart from the upper metal plate by a predetermined distance and functions as a radiator; a ground plate disposed apart from the lower metal plate by a predetermined distance; and a feeding probe disposed at the center of the upper and lower metal plates. The antenna can perform radiation parallel to the earth's surface including other directions. Therefore, it is suitable for an RFID reader which recognizes an RFID tag attached in parallel to the earth's surface. The electrical loop antenna can control impedance matching, resonance frequency, antenna gain, and radiation pattern according to the distance between metal plates, size of the metal plates, thickness of a feeding probe, and how the metal plates are arranged.

Abstract: An interface antenna is positioned between a tag antenna associated with a tag and a reader antenna associated with a reader. The interface antenna receives an electromagnetic carrier signal transmitted by the reader antenna and causes an increase in intensity of the electromagnetic carrier signal at the location of the tag antenna, thereby increasing the distance over which the tag can communicate with the reader. Where the tag is attached to a packaged object, the interface antenna may be included in the package to allow wireless data communication between the tag and a reader external to the package. For example, the interface antenna may be attached to a label on the package. At least a portion of the interface antenna may be formed from a conductive ink applied to the label and/or the container. The object may be a module, also known as a customer replaceable unit (CRU), and the tag may be configured as a customer replaceable unit monitor (CRUM).

Abstract: The invention concerns an electronic entity comprising an electronic circuit and an antenna one part of which at least forms a conductive circuit connected to two ends of the electronic circuit. The projection of the circuit formed by the antenna and the electronic circuit in a plane which is substantially parallel thereto, forms an intersection-free line and the antenna includes a winding which extends over strictly more than one turn.

Abstract: An antenna assembly includes an antenna. The antenna assembly includes at least one interrupted loop or rod of electrically conducting material and a printed circuit board (PCB). At least a part of the PCB together with the at least one interrupted loop or rod of electrically conducting material forms the antenna.

Abstract: A communication device includes a radio frequency identification tag that performs a radio communication with a predetermined device. A first metal body has an electrical conductivity. A space adjustment unit is configured to adjust a space between the first metal body and the radio frequency identification tag. The first metal body is configured to be replaced with a second metal body, and when the first metal body is replaced with the second metal body, the space adjustment unit is configured to adjust a space between the second metal body and the radio frequency identification tag.

Abstract: A wireless IC device includes a wireless IC chip for processing a transmission/reception signal, a printed wiring circuit board on which the wireless IC chip is mounted, a ground electrode disposed on the circuit board, and a substantially loop-shaped electrode that is electrically conducted to the wireless IC chip and disposed on the circuit board so as to be coupled to the ground electrode by an electromagnetic field. The ground electrode is coupled to the wireless IC chip via the substantially loop-shaped electrode to transmit/receive a radio frequency signal. A feeder circuit board including a resonant circuit and/or a matching circuit may be interposed between the wireless IC chip and the substantially loop-shaped electrode.

Abstract: The thermal printhead (A1) performs printing on RFID tag (T) as a print target that includes a coil antenna and a memory. The thermal printhead includes a coil antenna (3) as a part of a data transmitter-receiver for the transmitting and receiving of data with respect to the RFID tag (T) by wireless communication.

Abstract: An apparatus for receiving electromagnetically induced current, the apparatus comprising an antenna element for receiving electromagnetically induced current in a first apparatus operating mode, and also for near field communication in a second apparatus operating mode, wherein the apparatus comprises circuitry for switching the apparatus from the second apparatus operating mode to the first apparatus operating mode based on near field communication signalling received via the antenna element in the second apparatus operating mode.

Abstract: Tuning an antenna circuit that includes an inductance of a resonance circuit, and a component having a component impedance. The antenna circuit includes multiple connection areas for connecting the component to the antenna circuit. At least two of the multiple of connection areas are part of the resonance circuit. The tuning can be performed by selecting at least one connection area for the component among the at least two of the multiple connection areas.

Abstract: A conveyor system for processing items on which radio frequency identification tags are disposed includes a frame, a conveyor that is disposed moveably on the frame and that conveys items through a path of travel, each item having at least one respective radio frequency identification tag disposed thereon, a first antenna, a second antenna, a radio frequency receiver, a processor, and radiation absorbing material disposed between the first and second antennas and the path of travel, so that the absorbing material shields a portion of the radiation that would otherwise radiate into an area through which the items pass.

Abstract: A portable radio communication apparatus is provided with a boom portion having both ends connected with a housing of the portable radio communication apparatus and having a central portion located between both ends. In the portable radio communication apparatus, at least one through hole is formed between the boom portion and the housing. The boom portion includes a central portion and two end portions. The central portion extends in parallel to a width direction of the portable radio communication apparatus, and the two end portions are bent respectively from both ends of the central portion.

Abstract: An IC tag communication relay device is provided with an antenna section, lead lines and input/output unit. The antenna section is equipped with one or more antennas for transmitting and receiving electromagnetic radiation to and from IC tags. The lead lines are connected to each antenna for transmitting electrical signals corresponding to transmitted and received electromagnetic radiation. The input/output unit is arranged outside of the antenna corresponding to each antenna connected to the lead lines.

Abstract: An antenna apparatus is mounted at a wheel rim as a transponder of a system for monitoring a tire pressure or the like, and attached at an end portion of an air valve. The apparatus includes a circuit board having an electronic circuit portion and a grounding conductor layer, a sheet-metal inverse-F type antenna element, a sheet-metal shield case conducting to the grounding conductor layer to cover the electronic circuit portion, and a resin case for accommodating these components. One side surface extending in a longitudinal direction of a space defined between the circuit board and the radiating conductor of the antenna element faces one of sidewalls of a tire, and the other side surface thereof faces a wall surface of the wheel rim with a distance interposed therebetween, the distance being about one-fourth of a wavelength of a radio wave to be used.

Abstract: The biconical loop antenna is the dual and compliment to the biconical dipole antenna, and has broadband omnidirectional horizontally polarized radiation. The antenna includes a conductive antenna body having first and second opposing ends with a medial portion therebetween. The antenna body has a slot extending from at least adjacent the first end to at least adjacent the second end, and the medial portion of the antenna body is wider than the opposing ends. First and second body portions may be conical antenna elements connected together at their respective bases. Antenna feed points are at the medial and chine portion of the antenna body adjacent the slot.

Abstract: In a portable radio communication apparatus including a housing, at least one part of the housing is formed as a housing electrical conductor portion by an electrically conductive material. The housing electrical conductor portion is connected with a radio communication circuit of the portable radio communication apparatus so as to operate as at least one part of an unbalanced type antenna of the radio communication circuit. Further, the portable radio communication apparatus further includes a boom portion coupled with the housing at least at two positions so as to provide at least one penetrating hole between the housing and the boom portion.

Abstract: Transmitters or object identifiers are discloses that are able to radiate consistent power regardless of the object where the transmitters or object identifiers are placed. The transmitter or object identifier may include a vertical loop antenna. The loop plane of the vertical loop antenna is substantially perpendicular to the surface of the object where the transmitter or object identifier is placed. The transmitter or object identifier may include a folded vertical loop antenna where the loop plane of the vertical loop antenna is extended and folded to have additional loop planes. The antennas of the present invention enable the transmitter or object identifier to radiate consistent power regardless of the object where the transmitter or object identifier is placed and regardless of the orientation of the transmitter or object identifier.

Abstract: Location determination is performed using a transmitter including an elongated generally planar loop antenna defining an elongation axis. The elongation axis is positioned along at least a portion of a path. A magnetic field is then generated which approximates a dipole field. Certain characteristics of the magnetic field are then determined at a receiving position radially displaced from the antenna elongation axis. Using the determined certain characteristics, at least one orientation parameter is established which characterizes a positional relationship between the receiving position and the antenna on the path. The magnetic field may be transmitted as a monotone single phase signal. The orientation parameter may be a radial offset and/or an angular orientation between the receiving position and the antenna on the path. The antenna of the transmitter may be inserted into a first borehole to transmit the magnetic field to a receiver inserted into a second borehole.

Abstract: Antenna assemblies for magnetic resonance signals comprise a non-resonant loop antenna and a high impedance differential amplifier. The amplifier can include first and second high electron mobility transistors that have gates coupled to an antenna loop that is defined on a rigid substrate. The non-resonant loop has an effective length of less than about 1/10 of a wavelength of a signal to be detected. Arrays of such loops can be defined on the rigid substrate, and HEMTs for the loops secured to the substrate.

Abstract: A series of parallel spaced conductors through which currents are sequentially switched. A spatial relationship of the sequentially switched currents is chosen such that, at different times, tangential and normal magnetic fields are produced at the same location. The conductors are preferably arranged in a planar fashion and the tangential and normal magnetic fields are produced above the planar surface. A single layer of parallel spaced conductors provides substantially two dimensional operations. Adding a second parallel layer of orthogonally oriented parallel spaced conductors provides substantially three dimensional operations where currents are sequentially switched in both layers.

Abstract: A multiple band capacitively-loaded magnetic dipole antenna includes a plurality of magnetic dipole radiators connected to a transformer loop where the magnetic dipole radiators include at least one capacitively-loaded magnetic dipole radiator. The transformer loop has a balanced feed interface and includes a side that provides a transformer interface of quasi loops formed by the plurality of magnetic dipole radiators. Each quasi loop has a configuration and length to maximize antenna performance within a different frequency band. The at least one capacitively-loaded magnetic dipole radiator may be formed with a meander line structure and may include an electric field bridge such as a dielectric gap, lumped element, circuit board surface-mounted, ferroelectric tunable, or a microelectromechanical system (MEMS) capacitor.

Abstract: A security element for RF identification and a process for the production of such a security element. The security element has a flexible, electrically non-conducting substrate layer and a conductive layer of an electrically conducting material which is applied to the substrate layer and which in a first surface region of the substrate layer is shaped out in pattern form to form an RF component. A first relief structure is shaped at least in region-wise manner in the surface region, associated with the RF component, in the first conductive layer.

Abstract: The present invention provides apparatuses and methods for an antenna in a wireless receiving system. The antenna includes an opened segmented component that is electrically coupled to a printed circuit board and a capacitive top loaded component that provides a capacitive load. The vertical profile of the antenna may be reduced sufficiently so that the antenna may be internally located in the same enclosure as the printed circuit board. The capacitive top loaded component is situated away from a ground plane of a printed circuit board to reduce the capacitive coupling is reduced, and consequently the required voltage standing wave ration (VSWR) is maintained over a broad operating range. The capacitive top loaded component includes a closed shape that provides a capacitive load. In order to tune the antenna to operate with a desired characteristic (e.g., within a VSWR criterion), the closed shape may be modified.

Abstract: An antenna operable to transmit or receive radio frequency signals at a specified frequency, the antenna comprising a first printed circuit board comprising a first loop of conductive material having a capacitance and an inductance, the capacitance and the inductance forming a circuit being resonant at the specified frequency; and a second printed circuit board comprising a second loop of conductive material having two ends adapted to be electrically coupled to an electronic circuit, the second loop being substantially only magnetically coupled to the first loop and electrically insulated from the first loop; the antenna for use with a device for controlling the power delivered to an electrical load, further wherein the first loop of the conductive material comprises a break and the capacitance includes a capacitor bridging the break; wherein the first loop comprises a first metal layer on a first side of the first printed circuit board and a second metal layer on a second, opposite side of the first printed

Abstract: A loop antenna providing a reception performance equivalent to a patch antenna receiving a circularly polarized wave, simple in configuration, and kept low in cost, which forms a loop element and a parasitic element provided independently of this loop element on the same dielectric board to form an antenna element and sends or receives a circularly polarized wave by this antenna element, provides a metal plate parallel with or having a slight inclination with respect to the dielectric board, and sets this metal plate separated from the dielectric board by exactly a predetermined distance.

Abstract: The present invention relates to an antenna element for a portable communication device as well as to a portable communication device including such an antenna element. The antenna element includes a wire of an electrically conducting material having a first and a second feeding end for connection to a radio communication unit and ground. The wire also has a winding section comprising a number of turns around a central axis. The last turn of the winding section, which is provided furthest from the first feeding end is in physical contact with the previous turn and the rest of the turns are separated from each other.

Abstract: A multipole antenna for conducting logging-while-drilling (LWD), includes a wire for one of producing and receiving an electromagnetic field, the wire having at least one winding for providing a magnetic moment in a first portion of the antenna that is opposite to the magnetic moment of a second portion of the antenna. A method for constructing the multipole antenna is provided. A LWD tool making use of the antenna is also provided.

Abstract: An antenna for an electromagnetic induction method, in which unevenness in current density distribution is suppressed so that a magnetic field with reduced distortion is generated. In addition, a semiconductor device with less variation in response frequency and communication distance is also provided. The antenna has a loop-like shaped conductive structure with a cut portion in a part thereof and cross-sectional surfaces of the conductive structure face each other in the cut portion. In addition, the conductive structure of the antenna is electrically coupled to have capacity in the cut portion. The semiconductor device has the antenna and an integrated circuit which is connected to the antenna in a power feeding portion.

Abstract: An antenna comprising a radiating element for transmitting and receiving communication signals is disclosed. A load and a feed are connectable to the radiating element and that the feed is spaced apart from the load. The radiating element is a planar loop having two free ends to which the load and the feed are connected. The load has two distal terminals, one of which is connected to one of the two free ends and the other is provided for connecting to one of grounding and another radiating element.

Abstract: The present invention seeks to provide a multiple monopole antenna including a looped conductor having at least two conductive arms extending therefrom and a common feed point located on the looped conductor.

Abstract: A dual-band loop antenna comprising: a grounding plane, a radiation metallic loop and a radiation metallic plate, the shape of the grounding plane is generally rectangular having a grounding point and a shorting point; the radiation metallic loop has a feeding end and a shorting end, the shorting end is electrically connected to the shorting point on the grounding plane; while the radiation metallic plate is encircled by the radiation metallic loop, and one terminal point of the radiation metallic plate is electrically connected to the vicinity of the shorting end of the radiation metallic loop. The embodiments of antennas of the present invention suit designing of antennas for mobile phones using the bands of GSM (890˜960 MHz)/DCS (1710˜1880 MHz).

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna may be in the form of a polygonal, elliptical curve and/or coil shape. The wireless communication device is coupled to the wave antenna to provide wireless communication. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its curved structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breakage that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: The arrangement of a magnetic coupling coil (2) and a transponder circuit (1) on a vehicle wheel (5) allows wireless data communication with an interrogation circuit (3) arranged on a fixed structure of the vehicle on which the wheel is mounted so as to be able to rotate about at least one rotational axis (9). The magnetic coupling coil is mounted coaxially to the rotational axis of the wheel and defines a closed loop. This coupling coil acts as an inductive coupling interface between an antenna coil (10) of the transponder and an excitation coil (4) of the interrogation circuit. This magnetic coupling coil comprises a loop portion (2?) oriented such that the magnetic field (11?) in the magnetic coupling coil, which is induced by a primary magnetic field (8) generated by the interrogation circuit excitation coil, is directed in this loop portion in a substantially perpendicular direction to the primary magnetic field.

Abstract: A transmission/reception antenna (21) comprises a core (31) and a coil (32) wound around the core (31). One of a plurality of core sheets (31a) constituting the core (31) is utilized as a sensor electrode (23). Conductors (33, 34) extending from the two ends of the coil (32) are connected to a transmission/reception drive circuit (22). The conductor (35) extending from a capacitance detector (24) is connected to one of the conductors (33, 34) extending between the coil (32) and the transmission/reception drive circuit (22). Consequently, the capacitance detector (24) is alternately connected to the sensor electrode (23) through a parasitic capacitance C1 generated between the coil (32) and the sensor electrode (23) (core sheet (31a)).

Abstract: A compact antenna for use in a device for controlling the power delivered to an electric load and operable to transmit or receive radio frequency signals at a specified frequency is presented. The antenna comprises a first loop of conductive material having a capacitance and an inductance forming a circuit being resonant at the specified frequency, and a second loop of conductive material having two ends adapted to be electrically coupled to an electronic circuit. The second loop is substantially only magnetically coupled to the first loop and is electrically isolated from the first loop. In a first embodiment of the antenna, the first and second loops are formed on respective first and second printed circuit boards, which allow for a small, low-cost antenna that is easy to manufacture and maximizes efficiency. When the antenna is installed in a load control device, such as a dimmer, the first loop of the antenna is mounted on an outer surface of the device.

Abstract: A method of forming a printed circuit card with a metal power plane layer between two photoimageable dielectric layers is provided. Photoformed metal filled vias and plated through holes are in the photopatternable material, and signal circuitry is on the surfaces of each of the dielectric materials connected to the vias and plated through holes. A border may be around the card including a metal layer terminating in from the edge of one of the dielectric layers. Copper foil with clearance holes is provided. First and second layers of photoimageable curable dielectric material are on opposite sides of the copper. Patterns are developed on the first and second layers of the photoimageable material to reveal the metal layer through vias. Through holes are developed where holes were patterned in both dielectric layers. The surfaces of the photoimageable material, vias and through holes are metallized by copper plating, preferably using photoresist.

Abstract: A loop antenna device includes a loop antenna having a high noise resistance performance. In a loop antenna having a shield member covering a looped conductor portion formed in a loop shape from a conductive wire, a non-covered portion where the looped conductor portion is not covered is formed in correspondence with a portion of the conductive wire including a reference position for the symmetry of two terminals for connection between the antenna device and a reception circuit. This provides a balanced shield structure. Besides, a line for connecting one end of the conductive wire to the ground potential and a line for connecting the shield member to the ground potential are individually separate from each other, whereby reception of a voltage fall due to common impedance by the antenna is suppressed.

Abstract: The present invention relates to a wireless communication device and an antenna arrangement in such a device, where a loop antenna element (18) comprises: a first section (20) provided in and extending a length in first plane, a second section (22) spaced from, provided in and extending a length in the first plane, a third section (24) in a second plane parallel to the first plane, aligned with the first and second sections, and a fourth (26) and a fifth section (28) interconnecting antenna sections in the first and second planes. The sections form a three-dimensional structure having a substantial two-dimensional extension in at least one of the first and second planes. The second section extends along the same line as the first section or has a curvature, which is a continuation of the curvature of the first section. Thereby a small wideband antenna requiring a small ground plane is obtained.

Abstract: The invention regards a communication device which is adapted for placement in a users ear. The communication device comprises a shell part enclosing an input transducer for receiving an input signal, a signal processing device and an output transducer for providing a signal perceivable as sound, a battery located at a surface part of the shell which is facing away from the head of the user, a transmission and reception circuit for transmission and/or reception of electromagnetic energy. According to the invention an antenna for radiating and/or receiving electromagnetic energy is provided such that it has a first surface turned towards the surroundings and a second surface located in close proximity of the battery.

Abstract: A contactless reading system, wherein a chip card is fixed on a planar support of an object such as a book (11) for identification by means of the data contained in the chip card, and a mobile reader (16) provided with an antenna in order to read the data of the card. The antenna of the reader (16) consists of a small-sized convolution disposed in a series with a large-sized convolution, which are concentric and which have the same winding direction. A maximum value is obtained for the component (H) of the electromagnetic field produced by the antenna parallel to the antenna at a given distance from the antenna. Maximum reception by the chip card of electromagnetic signals emitted by the antenna is obtained when the antenna is disposed in a perpendicular position in relation to the support of the card and at the given distance from the card.

Abstract: The present invention relates to a radiating element designed to operate in an electrically small antenna including a conducting strip folded N times like a bellows.

Abstract: A transmission line resonator loop antenna includes a transmission line resonator for receiving an input excitation signal and producing a predetermined resonant output signal which is substantially phase reversed relative to the input excitation signal; and a loop antenna having one end responsive to the phase reversed output signal and the other end responsive to a reference excitation signal for maintaining the predetermined resonance.

Abstract: A loop antenna is provided having a matching circuit integrally formed includes a radiator which is formed in a loop shape; and a matching circuit including an extension part extended from one side of the radiator to an inner side of the loop and a bend part bent from an end of the extension part several times. Accordingly, the space for the installation of the loop antenna can be reduced and the design modification of the matching circuit can be facilitated.

Abstract: An RFID tag which has improved radiation/reception characteristics when used in proximity to the human body, and has an antenna which, when stacked with a 13 MHz band RFID tag, does not have an effect on the loop antenna of that tag. An RFID tag assembly comprises a first RFID tag having a coiled loop antenna and a second RFID tag superposed on the first RFID tag, the second RFID tag comprising an antenna formed by a metal member which covers at least a portion of a surface of a dielectric substrate, an electronic part mounted on the metal member, and a member which is provided with the overlapped coiled loop antenna of the first RFID tag housed in the end thereof so as to cover a portion of the antenna formed by the metal member.

Abstract: An electronic device an antenna, an information processing apparatus for the purpose of processing information captured by the antenna, and a metal exterior parts capable of housing therewithin the antenna and the information processing apparatus, wherein the metal exterior parts is configured so that the antenna can receive magnetic flux from outside the metal exterior parts that has passed through the metal exterior parts and can resonate, and wherein at least a part of the metal exterior parts has an electrical resistance value that is different from another part of the metal exterior parts.

Abstract: An antenna device for a portable device has an antenna loop of conducting material to be connected to radio circuitry in the portable device. The antenna loop is positioned opposite a ground plane of a PCB. Also, the antenna device also comprises at least one battery, which is positioned in the extension of a first side of the PCB, and acts as an extension of the ground plane of the PCB.

Abstract: Disclosed is a data communication apparatus for non-contact data communication using electromagnetic induction. At least a portion of a conductor 5a of the loop coil antenna (5) of the data communication apparatus, adapted for non-contact data communication, exploiting electromagnetic induction, is arranged for extending along the lateral side of an enclosure (2a) for equalizing the sensitivity of the loop coil antenna (5) across both major surfaces of the enclosure (2a).

Abstract: An RF air coil transponder includes a rotatable carrier, such as a rigid reel. A coil is wound about the reel and at least one field influencing body for influencing the electric and/or the magnetic field within the coil is supported by the reel. The rigidity of the reel enables the coil to keep its form and guarantees precise distances between windings, especially when a winding machine forms the coil. Adjusting the angular position, shape, composition, size, and/or surface are of the body effects adjustment of the resonant frequency.

Abstract: An antenna coil has a simple structure and a high sensitivity and can be thinner. The antenna coil includes an X Y coil unit having an X axis coil and a Y axis coil wound around a core, a Z axis coil wound around the X Y coil unit, and a resin portion insert molded around the X Y coil unit and the Z axis coil. In the antenna coil, the X axis coil, the Y axis coil, and the Z axis coil are arranged so that the three coils have an axis in a direction orthogonal to each other, and the X Y coil unit and the Z axis are integrated by the resin portion.