Abstract: A circuit board has a first face and a second face opposite to the first face. An electronic component is mounted on the second face. An insulative sheet is disposed between the first face of the circuit board and an antenna and having an electromagnetic shielding property.

Abstract: A corner reflector antenna includes a ground plate having a main surface, a reflector including a rectangular first metal plate and a rectangular second metal plate which are perpendicularly provided on the main surface of the ground plate, the first and second metal plates being combined together to form a prescribed angle, a radiator including a rectangular third metal plate perpendicularly provided on the main surface, at a position where the angle is divided in half, the third metal plate including a first edge which is opposite the main surface, the first edge having a plurality of first cutouts, and a second edge which is opposite the reflector, the second edge having a second cutout extending toward the reflector, and a first feeding point and a second feeding point provided on respective sides of the second cutout on the third metal plate in the vicinity of the second edge.

Abstract: A mobile communication device having primary resonator coupled to a near field deflector. The near field deflector forms a false edge for near field deflection wherein the primary resonator couples with the false edge instead of to metallic portions of the device or the user.

Abstract: A tunable passive anti-jamming antenna array system and method for minimizing the effects of electromagnetic interference in radio frequency antenna systems. The system and method utilize an external array of passive open circuited antennas strategically arranged between an intended receiving antenna unit and interfering signals to disrupt the interference signals and reduce the electromagnetic energy, interference, and noise reaching the intended receiving antenna unit.

Abstract: An electromagnetic interference preventing component (18) includes a high-permeability magnetic film in high-frequency in which a real number component ?? of complex relative permeability at a transmission band frequency of an electronic device (10) incorporating the electromagnetic interference preventing component (18) is 10 or more, tan ? (=??/??) is 0.1 or less, and a ferromagnetic resonance frequency (fr) is 1.5 times or more of the transmission band frequency. The electromagnetic interference preventing component (18) having the high-permeability magnetic film in high-frequency is disposed in the electronic device (10) having an electromagnetic wave transmitting function, as to selectively decrease the electromagnetic field intensity in directions in which the electromagnetic waves radiated by an electromagnetic wave transmitting part such as an antenna (16) are not required.

Abstract: An antenna module comprising at least two antennas in substantial close proximity and a shield configured to reduce interference between the antennas and/or to shape the antenna coverage areas is disclosed. A substantially triangular shield with antennas positioned at each of the vertices may shape the antenna coverage areas to form virtual sectors.

Abstract: An antenna is mounted in a vehicle for receiving a radio wave of a specified wavelength, and an electronic device such as a meter device is mounted in the vehicle. The electronic device tends to generate radiation noise when being operated. To reduce reception of the radiation noise by the antenna, a passive conductor element is located between the antenna and the electronic device to reflect a part of the radiation noise. The passive element is away from the electronic device by a distance that is about multiple times of one-quarter of the specified wavelength and is about multiple times of one-half of the specified wavelength in length.

Abstract: A multiple access wireless communications architecture provides selective, simultaneous communications with wireless devices located in different sections of a spatial area around a communications apparatus referred to as “sectors”. This includes communications between wireless devices in a single sector, between wireless devices in different sectors and between wireless devices and a wired network or wireless backhaul network. The wireless communications architecture generally includes two or more wireless antenna arrangements that are each configured to provide communications with wireless devices located in a particular sector. Each wireless antenna arrangement is further configured to determine whether signals are being communicated on a communications channel before transmitting on the communications channel. This may be implemented, for example, using a carrier sense or energy detection mechanism.

Abstract: An apparatus and method is provided to shield contactless portable electronic consumer devices such as radio frequency identification devices (RFID), tokens, mini-cards, key fobs, cellular phones, smartcards, etc. from wireless interrogation. In one embodiment, a contactless portable consumer device which includes a first antenna is shielded from unauthorized wireless interrogation with a radio frequency (RF) shield. The RF shield includes electrically conductive, non-ferromagnetic material and is configured to prevent unauthorized data transfer between a second antenna external to the portable consumer device and the first antenna.

Abstract: A mobile wireless communications device includes a housing and circuit board carried by the housing and having RF circuitry comprising at least one RF component and plurality of other components mounted on the circuit board. An RF metal shield is secured to the circuit board and surrounds and isolates the at least one RF component and plurality of other components within the RF metal shield. An RF absorber is positioned adjacent an area of the RF component that radiates energy to aid in reducing energy radiated from the RF component into the RF metal shield.

Abstract: An EMC (electromagnetic compatible) antenna having a shielding metal wall to effectively reduce the possible coupling with nearby electronic elements is presented. The antenna includes: a ground plane, a bent ground plate, and a radiating plate. The bent ground plate is vertically connected to the ground plane and functions as an effective shielding metal wall to eliminate or greatly reduce the possible EM coupling between the antenna and nearby electronic elements. The radiating plate is used to generate the operating resonant mode of the antenna and is generally parallel to the ground plane. The radiating plate is also electrically connected to and encircled by the bent ground plane.

Abstract: A mobile terminal and a mobile terminal antenna reduce the intensity of electromagnetic waves radiated in the direction of a human body. The mobile terminal antenna includes a radiator, which radiates electromagnetic waves; a ground which is connected with the radiator, and a radiation preventer which has a metallic bar on one side of the ground in parallel with the ground at an interval. Accordingly, the electromagnetic radiation exposure to the human body can be reduced by altering the radiation emission pattern, while the performance of the antenna can be simultaneously enhanced.

Abstract: A field device in an industrial process control system having an electrically grounded housing with an electrical circuit located within the housing is described. The electrical circuit includes wireless communication circuitry and is electrically isolated from the housing. The field device also includes an antenna that is attached to the housing and a cable having a shield positioned between the wireless communication circuitry and the antenna. The cable provides electrical communication between the electrical circuit and the antenna. The electrical circuit is electrically isolated from the housing, and the shield of the cable is electrically grounded to the housing.

Abstract: Techniques are provided to prevent undesired and/or unauthorized analysis and access to electronic components designs. A shield can be utilized to prevent invasive and/or non-invasive analysis methods such as the use of x-rays to determine the structural configuration and/or component makeup of an embedded antenna. In addition, a damageable material that can be utilized alone or in conjunction with the shield is also provided. When attempting to access the antenna and/or components included therein, any inappropriate force or exposure to certain elements, such as heat, will cause the material and the antenna and/or the components therein to be damaged or melted beyond a point of useful recognition for the entity. Furthermore, thin films can be utilized to construct one or more portions of the antenna to the same effect. In addition, the antenna and/or components can be configured for actively reconfiguring a resonant frequency of the antenna.

Abstract: A chip seal ring that maintains the chip seal ring as a continuous barrier to contamination, while at the same time creating a desirable electrical feature in the seal ring that enables the use of an on-chip loop antenna. In one embodiment, at least a portion of the chip seal ring has a serpentine configuration, such as a square wave, triangle wave, or curved geometry, that increases the reactance and resistance of the seal ring so as to mitigate the adverse induced currents created by the magnetic coupling effects between the on-chip antenna and the seal rings, thereby improving the efficiency of an on-chip loop antenna in the presence of the seal ring.

Abstract: A shielded antenna system is provided for reading from and/or writing to an RFID transponder wherein the energy radiated from the antenna system has a narrow beam width so that only one RFID transponder in a record member along a web of record members, each having an RFID transponder, is read from and/or written to without affecting or being affected by any other RFID transponder along the web.

Abstract: An internal antenna system (200) for reducing interference in a wireless communication device (100) is provided. The internal antenna system (200) comprises an antenna (202) and a housing (110). The housing is configured to reduce interference in the transmission caused by the metal surface of the housing. The housing is made of or plated with an electromagnetically transparent decorative metal (ETDM). The housing has metal islands, which are separated from each other by gaps. These gaps in the ETDM surface allow the radio frequency (RF) energy of signals transmitted by the antenna to pass through.

Abstract: A decoherence plate provides reduced field coupling or improved isolation between two or more antennas. An antenna module includes a first antenna, a second antenna and a decoherence plate having a surface. The first antenna transmits one or more electromagnetic signals. The surface of the decoherence plate is positioned in a plane perpendicular to a line connecting the first antenna and the second antenna. For each first path from the first antenna to the plane to the second antenna, in a plurality of paths having a range of path lengths, there is a corresponding second path, from the first antenna to the plane to the second antenna, that is substantially 180° out of phase for a respective wavelength in the one or more electromagnetic signals transmitted by the first antenna. In this way, the decoherence plate reduces the field coupling between the first antenna and the second antenna.

Abstract: An antenna system includes a dielectric structure formed on a substrate; an antenna, partially within the dielectric structure, and supported by the dielectric structure; a reflective surface formed on the substrate. A shield blocks radiation from a portion of the antenna and from at least some of the dielectric structure. The shield is supported by the dielectric structure.

Abstract: The present invention is a dual frequency and circularly polarized microstrip antenna with a ground plane, a mid layer above the ground plane with a parasitically driven resonant mid patch (for transmissions at a second frequency), a top layer with a directly driven patch parasitically driving the mid patch (for transmissions at a first frequency), and parasitic elements.

Abstract: An antenna device includes an antenna element, a high-frequency circuit connected to the antenna element, a first ground section connected to the high-frequency circuit, a reactance circuit connected to the first ground section, and a second ground section connected to the reactance circuit. Employing the structure above allows the antenna device to have a compact body and to easily control antenna characteristics, such as radiation characteristics and input impedance characteristics.

Abstract: A second ground plane (18); has one end opposite to a connector (14), which end is connected to a first ground plane (17) by resistor connection element (41). Accordingly, it is possible to lower Q of resonance of the ground structure by the resistor connection element (41) and to prevent generation of an intense electromagnetic field attributed to an electromagnetic field of a data processing circuit. Especially when the resistor connection element (41) has a resistance value identical to a characteristic impedance of the ground structure, the ground structure is terminated in a matched way and it is possible to assure prevention of generation of an electromagnetic field attributed to resonance.

Abstract: A phased array antenna (400) comprises a first array element (402) and second array element (404) and a dielectric separator (408). Each of the first and second array elements (402,404) is a detection element and or an emitter element. The dielectric separator (408) is located between the first and second array elements (402, 404) and within a path of an inter-element mutual coupling (IMC) signal between the first array element (402) and the second array element (404).

Abstract: In an antenna apparatus, at least one choke in the form of a groove is arranged between a transmitting antenna and a receiving antenna. The choke functions to suppress the mutual electromagnetic coupling between the transmitting antenna and the receiving antenna. The depth of the choke is in a range from 0.15, to less than 0.225? where ? is a wavelength of a carrier wave.

Abstract: A radio frequency identification (RFID) system is described that utilizes a substantially-contiguous conductive shield to shape an electromagnetic field formed by an antenna for communication with RFID tags. The antenna and the conductive shield have substantially planar forms, and may be mounted to a surface of a check-in/check-out area. The conductive shield is positioned around the antenna and within a plane parallel to the antenna, e.g., within the same plane. The conductive shield shapes the electromagnetic field to extend substantially in a direction perpendicular to the antenna, and prevents the electromagnetic field from forming substantially over the conductive shield.

Abstract: A wireless communication device includes multiple antennas spaced apart from each other. Also included is a dielectric substrate with electrically conductive ground areas along the substrate opposite the antennas. Signal coupling is decreased between the antennas by connecting the ground areas together with an isolation structure. In one nonlimiting form, this structure includes an electrically conductive meander line structure.

Abstract: A circuit board has a first face and a second face opposite to the first face. An antenna element is mounted on the first face. A shield cover is attached to the second face. The shield cover includes a polygonal base portion, a first wall provided on a first side of the polygonal base portion, a second wall provided on a second side of the polygonal base portion, a third wall provided on a corner defined by the first side and the second side, and disposed between the first wall and the second wall, a first extending portion extended from the first wall so as to overlap with the third wall, and a second extending portion extended from the second wall so as to overlap with the third wall. The shield cover is soldered on the second face.

Abstract: In a high-frequency module, an antenna device is disposed on a first principal surface of a second substrate, a first principal surface of a first substrate and a second principal surface of the second substrate face each other and are connected to each other by conductive connecting members, electronic components including an IC chip are mounted on the first principal surface of the first substrate, ground electrodes are disposed on the first and second substrates, the conductive connecting members are connected to a ground potential, and thus the IC chip is surrounded by the ground electrodes of the first and second substrates and the conductive connecting members.

Abstract: A wireless communication system includes a portable, typically hand-held transmitter which includes RF absorbing material and/or one or more dissipative parasitic antennas for reducing RF fields in close proximity to the operator to such an extent as to substantially preempt the effect of the operator presence, specifically the operator's hand, in field operation. As a result, the RF absorbing material and/or one or more dissipative parasitic antennas reduces the proportionate effect upon the RF radiation level caused by the operator's hand or other body part. The RF absorbing material may comprise a layer of such material upon a surface of a ground plane within a housing of the transmitter, and/or on an interior surface of the housing, and/or on an exterior surface of the housing. The dissipative parasitic antenna may comprise a printed antenna and resistive load integrated on the transmitter's printed circuit board or elsewhere in or on the housing.

Abstract: An apparatus is described incorporating an interposer having a cavity for a portion of an antenna structure, having conductor through vias, a top Si part having interconnection wiring and having pads for electrically mounting an integrated circuit chip thereon, wherein the top Si part mates with the interposer electrically and mechanically. The interposer and top Si part may be scaled to provide an array of functional units. The invention overcomes the problem of combining a high efficient antenna with integrated circuit chips in a Si package with signal frequencies from 1 to 100 GHz and the problem of shielding components proximate to the antenna and reduces strain arising from mismatching of TCEs.

Abstract: A multi-broad band antenna including a first radiating body, a second radiating body, a third radiating body, a grounding plate and many short-circuit elements is provided. The first radiating body excites a first resonant mode, such that the multi-broad band antenna has a high frequency wide bandwidth. The second radiating body excites a second resonant mode, such that the multi-broad band antenna has a middle frequency wide bandwidth. The third radiating body excites a third resonant mode, such that the multi-broad band antenna has a low frequency wide bandwidth. A number of short-circuit elements connect the first radiating body, the second radiating body and the third radiating body to the grounding plate respectively. The radiation patterns of the first resonant mode, the second resonant mode and the third resonant mode do not disturb each other.

Abstract: A radio frequency antenna structure includes a base station antenna and an auxiliary antenna mounted within a common antenna assembly. The base station antenna is configured to transmit or receive signals in a first frequency range and to develop a main beam that is substantially wider in azimuth than in elevation, and the auxiliary antenna is configured to transmit or receive signals in a second frequency range at least partially overlapping the first frequency range and to develop an auxiliary beam at least partially overlapping the main beam. Means are included for decoupling the base station and auxiliary antennas to thereby suppress interference between the main and auxiliary beams, and for suppressing interference between the auxiliary antenna and any co-located antennas.

Abstract: Devices and methods are provided to enhance magnetic field communication. One aspect of the present subject matter relates to a method for transmitting and receiving signals using an antenna element electrically connected to a driver and an amplifier. According to various embodiments of the method, a first signal is transmitted from the antenna element and a second signal that was induced in the antenna element is received. Transmitting the first signal includes driving the first signal through the antenna element using the driver, and monitoring the first signal through an input impedance of the amplifier. Receiving the second signal includes reducing the input impedance of the amplifier, and receiving the second signal at the amplifier through the reduced input impedance. Various embodiments shield the antenna element from electric and electromagnetic fields. Other aspects are provided herein.

Abstract: A wireless communication device includes a shell having a first shielding surface for shielding electromagnetic waves, a data processing module, a wireless communication module connected to the data processing module, and an antenna module disposed on the shell and connected to the wireless communication module. The antenna module has a first antenna unit and a second antenna unit. The first shielding surface shields the first antenna unit from the second antenna unit.

Abstract: Methods and apparatus for antennas, wireless cells and networks are described. Antennas may use a shield to provide a shape of coverage, area of coverage, and channel assignment pattern configured for high throughput wireless cells and networks. Antenna combining devices may be used to form wireless cells configured for high throughput wireless cells and networks.

Abstract: Antennas are provided for portable electronic devices. A portable electronic device may have a port that receives a wireless communications adapter. The adapter may be used to provide wireless functionality for the portable electronic device. The adapter may contain a chip antenna that serves as an antenna resonating element. A printed circuit board within the adapter may contain conductor that has been patterned to form a ground plane for the antenna. The portable electronic device may have a conductive structure such as a housing portion. The conductive structure of the portable electronic device serves as a parasitic antenna element that improves antenna efficiency. The portable electronic device may be a handheld electronic device with music player functionality that communicates with a compact portable wireless device in a piece of sports equipment.

Abstract: A shielding device for preventing an antenna signal from interference is disclosed. The shielding device includes a grounding component and a shielding plate. The shielding plate is made of a conductive material. The shielding plate has a first portion and a second portion. The first portion is grounded through the grounding component. The second portion is placed between an antenna and a display controller, so that the shielding plate can prevent the antenna from being interfered by the frequency component of the display controller.

Abstract: Improved electrical connector apparatus including a wireless antenna acting as a transceiver in conjunction with a wireless integrated circuit is disclosed. In one embodiment, the modular connector comprises an RJ45 modular jack, and the wireless transceiver comprises a Bluetooth transceiver transmitting via an integrated antenna disposed on the front face of the Faraday shield at least partly surrounding the modular connector. In another embodiment, an 802.11 transceiver is used. In yet another embodiment, an ultra-wideband (UWB) interface is used.

Abstract: Mobile antenna system comprising rotary part by azimuth, which is an electronically steered in elevation phase array antenna, comprising: plurality of (multi)layered structures, placed at certain levels, said structures include microstrip antenna elements (12), feeding lines (20), which properly combined and guide the electromagnetic energy, forming the necessary phase and amplitude distribution over the antenna elements, a plurality of electronic modules (28) providing amplification, phase change, frequency conversion and steering of the received signal, power supply and control circuits for the same electronic modules; a plurality of vertical transitions (13), providing the passing of the electromagnetic energy between the layered structures from different levels; frequency converting device and rotary joint (18), passing the received signal, the power supply and control circuits to the static part; sensors detecting the spatial movement of the system, and power supply and control units; static part, compri

Abstract: A broadband circularly polarization antenna device includes: a dielectric body, a patch, an antenna feed pin, and a grounding layer. The patch is disposed on a top surface of the dielectric body. The antenna feed pin is extended outward from a bottom surface of the dielectric body. One part of the grounding layer is coated on the bottom surface of the dielectric body, and the other part of the grounding layer is coated entirely around a lateral side of the dielectric body. Because the grounding layer is coated on the bottom surface and the lateral side of the dielectric body, the bandwidth of the antenna device is increased and interference from a PCB and other surrounding circuits to the antenna device is greatly reduced, thereby ensuring the antenna device performs well.

Abstract: An antenna device includes a coupling tube, a conductor member received in the coupling tube and having one end for electrically coupling to an electric facility, a socket member electrically coupled to the other end of the conductor member and having a socket opening for coupling to an antenna member. An insert may be disposed in the coupling tube and engaged between the coupling tube and the conductor member. A housing includes a chamber for receiving the socket member. The antenna member includes an antenna core having two or more electric rods wound together to form a helical structure having a decreased length.

Abstract: Disclosed are deactivatable RFID labels and tags in individual and web form, and methods of making same. When it is desired to deactivate the label or tag, the tag or label is subjected to tearing. One arrangement involves providing the label or tag with a tear strip by which the RFID transponder in the label or tag is destroyed, and in another arrangement a tag can be torn along a weakening line to destroy the RFID transponder.

Abstract: Apparatus and methods are provided for packaging IC chips together with integrated antenna modules designed to provide a closed EM (electromagnetic) environment for antenna radiators, thereby allowing antennas to be designed independent from the packaging technology.

Abstract: A radio frequency identification (RFID) system including a transponder, an antenna, and a reader, the antenna coupled to the reader, the antenna and the reader for transmitting a radio signal to the transponder and for receiving a response radio signal from the transponder, the response radio signal including data from the transponder, the system further including: a curtain that limits propagation of the radio signal; wherein the curtain includes a plurality of flexible strips transparent to visible light, the long edge of each of the strips is oriented in substantially the vertical direction, more than one strip overlaps a portion of the width of an adjacent strip along the length of the adjacent strip, and the length of each of the strips is substantially greater than the width of each of the strips.

Abstract: A curtain for a radio frequency identification (RFID) system including a transponder, an antenna, and a reader, the antenna coupled to the reader, the antenna and the reader for transmitting a radio signal to the transponder and for receiving a response radio signal from the transponder, the response radio signal including data from the transponder, the curtain including: a plurality of flexible strips that limit propagation of the radio signal; wherein the strips are transparent to visible light, the long edge of each of the strips is oriented in substantially the vertical direction, more than one strip overlaps a portion of the width of an adjacent strip along the length of the adjacent strip, and the length of each of the strips is substantially greater than the width of each of the strips.

Abstract: A method for using a radio frequency identification (RFID) system including a transponder, an antenna, and a reader, the antenna coupled to the reader, the antenna and the reader for transmitting a radio signal to the transponder and for receiving a response radio signal from the transponder, the response radio signal including data from the transponder, the method including: selecting a curtain that limits propagation of the radio signal; and placing the curtain in an area through which the radio signal would otherwise propagate; wherein the curtain includes a plurality of flexible strips transparent to visible light, the long edge of each of the strips is oriented in substantially the vertical direction, more than one strip overlaps a portion of the width of an adjacent strip along the length of the adjacent strip, and the length of each of the strips is substantially greater than the width of each of the strips.

Abstract: A wireless RF data transmission system subscriber station has a fixed, overhead bracket secured, spindle. An open sided housing is rotatably mounted to the spindle. The housing has a finned heat sink and is interiorly coated with heat absorbing paint. Emissions shielding enclosures secured within the housing house an RF transceiver. An antenna array mounted to an enclosure is operatively connected to the transceiver through the enclosures for communicating RF data signals. An A/D-D/A board is mounted to an enclosure on an opposite side from the array. A radome is secured over a face of the array, sealed to the housing by a carbon impregnated gasket. An electric motor mounted within the housing and operatively engaging the spindle is controlled by antenna aiming logic for aiming the station and its array. An orifice sealed with a waterproof, breathable membrane allows moisture to escape the housing and prevents moisture infiltration.

Abstract: A method for tuning the antenna of a portable terminal including the steps of applying electromagnetic interference (EMI) paint to the inner surface of a case of the terminal; positioning a PCB having a ground inside the terminal; positioning an internal antenna above the upper end of the printed circuit board (PCB) while being spaced at a predetermined height; applying EMI paint to the inner surface of the case in a predetermined pattern to provide a first region having a ground; and applying EMI paint while changing the application pattern to provide a second region extending from the first region and having a ground, the shape of which is varied to change the frequency tuning of the antenna.

Abstract: The invention relates to a device shielding especially an electronic unit with a transmitter, such as a mobile phone, against electromagnetic radiation. The device includes a crystal and an winding/spiral, where the winding/spiral is wound with the crystal arranged in the middle. One end of the winding extends immediately adjacent the antenna of the electronic unit. The device includes also a second winding of ferromagnetic material and a metallic film.

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.