Loop Type Patents (Class 343/788)
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Publication number: 20090322640Abstract: The present invention relates to a magnetic transmit antenna apparatus comprising: a toroidal core transformer having a primary winding inductively coupled to a secondary winding supplying a low voltage and high current to a magnetic transmit antenna wherein the magnetic transmit antenna includes a wire loop having multiple turns for generating a magnetic field. The toroidal core transformer includes a primary winding that operates in association with the secondary winding to match the impedance of a signal source to the magnetic transmit antenna.Type: ApplicationFiled: May 1, 2008Publication date: December 31, 2009Applicant: LOCKHEED MARTIN CORPORATIONInventor: David O. LeVan
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Publication number: 20090315787Abstract: A device having an electric antenna and a magnetic antenna is described, the antennas being spatially arranged in immediate mutual proximity. The electric antenna has at least one current-carrying electric conductor which acts as a resonator for the electric antenna, while the magnetic antenna has a coil with at least one current-carrying conductor loop which acts as an inductor of the magnetic antenna. Thus the electric antenna and the magnetic antenna are spatially arranged relative to each other such that the direction of the current in the electric conductor of the electric antenna extends substantially at right angles to the direction of the current in the conductor loop of the magnetic antenna.Type: ApplicationFiled: July 27, 2007Publication date: December 24, 2009Applicant: SIEMENS AUDIOLOGISCHE TECHNIK GMBHInventor: Ulrich Schätzle
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Publication number: 20090315799Abstract: An electronic entity (2) includes an electronic circuit (4) having connected thereto an antenna. The antenna includes a loop (6) electrically connected to the electronic circuit (4) and a resonator (8) coupled with the loop (6).Type: ApplicationFiled: May 24, 2006Publication date: December 24, 2009Inventors: Yves Eray, Guy Enouf
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Publication number: 20090305657Abstract: An antenna device receives radio waves, excites received signals corresponding to the received radio waves, and transmits the received signals to a radio wave-using operation module block including received signal using elements. The radio wave-using operation module block includes a pair of flat surfaces facing in opposite directions and an outer circumferential surface connecting the peripheral edges of the flat surfaces to each other. The antenna device includes an elongate antenna core member which extends along the outer circumferential surface of the radio wave-using operation module block, and an antenna coil which is wound around at lease a part of the antenna core member in the longitudinal direction thereof and which is connected to the received signal using elements of the radio wave-using operation module block.Type: ApplicationFiled: June 4, 2009Publication date: December 10, 2009Applicant: Casio Computer Co., Ltd.Inventor: Kaoru SOMEYA
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Publication number: 20090295663Abstract: The present invention provides a receiving antenna coil capable of realizing both improvement in the reception characteristic and miniaturization. In a receiving antenna coil, at least one of an X-axis winding core part and a Y-axis winding core part is formed in a plurality of bars. While increasing occupancy of the winding core parts (the X-axis winding core part and the Y-axis winding core part) in a region in the XY plane surrounded by a Z-axis receiving coil, the length of the winding core parts can be assured long. Further, since the X-axis winding core part and the Y-axis winding core part are provided in the same plane, the height of the core is suppressed, and the dimension of the entire receiving antenna coil can be suppressed.Type: ApplicationFiled: May 29, 2009Publication date: December 3, 2009Applicant: SUMIDA CORPORATIONInventor: Tsuyoshi Sato
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Publication number: 20090295664Abstract: An antenna device is constructed such that an antenna coil including a magnetic core and a flexible substrate is mounted to a circuit board. A first coil portion having a coil axis parallel or substantially parallel with a main surface of the magnetic core includes a first coil and a third coil. A second coil portion includes a second coil and a fourth coil. A conductor-free portion is located between the first and second coil portions. The flexible substrate includes a projection, and first to fourth coil connections are drawn out at the projection. The antenna device is constructed such that each of the coils is connected on the circuit board by connecting to a conductor pattern on the circuit board at the projection of the flexible substrate.Type: ApplicationFiled: August 17, 2009Publication date: December 3, 2009Applicant: Murata Manufacturing Co., Ltd.Inventors: Hiroyuki KUBO, Hiromitsu ITO, Kuniaki YOSUI
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Publication number: 20090289860Abstract: An active magnetic antenna with a ferrite core having a winding is provided, forming a frame magnetic antenna which is connected with a low-noise transistor, to amplify a signal of the frame magnetic antenna. A base of the transistor is connected directly to one contact of the winding, and a second contact of the winding is capable of shifting a voltage of the base of the transistor. The impedance of the frame magnetic antenna is adjusted as a complex conjugate with an impedance of the base of the transistor of the low-noise amplifier, and the winding eliminates its own resonances.Type: ApplicationFiled: April 30, 2009Publication date: November 26, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang-Ha LEE, Yong-Jin Kim, Jae-Ho Lee, Seung-Hwen Kim, S. Konstantin Krylov
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Publication number: 20090284422Abstract: An antenna and associated magnetic preamplifier for use with UHF and Microwave wireless telecommunications devices operating at frequencies of greater than 0.3 gigahertz. The antenna may include a plurality of concentric loops about a core. The antenna may be made of a conductor wound helically about an air core with a circumference and a number of loops, and the spacing of the loops chosen based on the desired frequency of communication. The antenna may include a plurality of loops of conductor about a core with a ferrite rod positioned within the core. The antenna may be omnidirectional and provide a high gain at the desired frequency of communication. The magnetic preamplifiers may be based on either resonant or ferrite material-enhanced amplification. Resonant and ferrite enhancements may also be used in combination.Type: ApplicationFiled: February 25, 2009Publication date: November 19, 2009Inventors: Kenneth J. Schlager, Jason W. Zehrung
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Patent number: 7616166Abstract: To achieve sensitivity not deviating in any of XYZ directions. A three-axis antenna with a cross-shaped core (2) having a pair of X-axis arms (22a, 22b) projecting in the X-axis direction in an orthogonal coordinate system and a pair of Y-axis arms (23a, 23b) projecting in the Y-axis direction orthogonal to the X-axis direction, and having Z-axis winding wire (26) provided in a substantially rectangular frame shape, outside the head sections of the X-axis arms (22a, 22b) and the head sections of the Y-axis arms (23a, 23b). The Z-axis winding wire is housed in a case having the bottom so as to cover the entire parts of head surfaces of the X-axis arms (22a, 22b) and of head surfaces of the Y-axis arms (23a, 23b).Type: GrantFiled: March 10, 2005Date of Patent: November 10, 2009Assignee: Sumida CorporationInventor: Hozumi Ueda
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Publication number: 20090267855Abstract: An antenna core produced by shaping a soft magnetic metal powder with the use of a resin as a binder, wherein the soft magnetic metal powder is an amorphous soft magnetic metal powder or a nanocrystal-containing amorphous soft magnetic metal powder, of the general formula (1): (Fe1-x-yCoxNiy)100-a-b-cSiaBbMc (1), and wherein the resin as a binder is a thermosetting resin. In the formula, M is at least one element selected from the group consisting of Nb, Mo, Zr, W, Ta, Hf, Ti, V, Cr, Mn, Y, Pd, Ru, Ga, Ge, C, P, Al, Cu, Au, Ag, Sn and Sb. Each of x and y is an atomic ratio and each of a, b and c an atomic %, satisfying the relationships: 0?x?1.0, 0?y?0.5, 0?x+y?1.0, 0?a?24, 1?b?30, 0?c?30 and 2?a+b?30.Type: ApplicationFiled: August 9, 2007Publication date: October 29, 2009Applicant: MITSUI CHEMICALS, INC.Inventors: Nobuhiro Maruko, Kunihiro Inada, Takehiko Omi, Mitsunobu Yoshida, Hiroshi Watanabe
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Publication number: 20090251997Abstract: A radio wave receiving device includes at least one magnetic drive unit and an antenna structure having a narrow core formed of magnetic material and a coil wound around the central part of the core. The device further includes two external magnetic members, each having a connecting part connected magnetically to one end part of the core. One magnetic member has a magnetism collecting part expanded in one side of the antenna structure from the connecting part to exclude the antenna structure, and the other magnetic member has a magnetism collecting part expanded in the other side of the antenna structure from the connecting part to exclude the antenna structure. These external magnetic members cover the drive unit in the both sides and shut off magnetic flux of external magnetic field from the both sides and collect magnetic flux of radio wave on the one end part of the core.Type: ApplicationFiled: April 1, 2009Publication date: October 8, 2009Applicant: Casio Computer Co., Ltd.Inventor: Soh KIMURA
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Publication number: 20090251376Abstract: Disclosed is a directional bar-type antenna which comprising a plurality of bar-shaped antenna elements including a core and a coil wound around the core. The first bar-shaped antenna element is disposed at a position of a mirror image of the second bar-shaped antenna element with respect to the core of the third bar-shaped antenna element. The first and second bar-shaped antenna elements is positioned such that one end of each of the first and second bar-shaped antenna elements is close to the third bar-shaped antenna element, and the other end is far from the third bar-shaped antenna element. In the present invention, a winding direction of the coil of the first bar-shaped antenna element is preferably identical to that of the coil of the second bar-shaped antenna element, and is opposite to that of the coil of the third bar-shaped antenna element.Type: ApplicationFiled: April 3, 2009Publication date: October 8, 2009Applicant: Toko, Inc.Inventors: Masayuki TAKAHASHI, Shuichi OGATA, Masanori EIRI, Kinya KISHITA, Satoru KIMURA
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Publication number: 20090243952Abstract: An antenna coil includes a wound body including a magnetic core, a bobbin surrounding the magnetic core, and a coil wound around the bobbin, a case in which the wound body is placed, and a foam disposed in a gap between the wound body and the case. The foam is compressed at a rate of about 45% to about 65% on the basis of a thickness of the foam in a non-load state. The antenna coil prevents breakage of the magnetic core and is suitable for use in a short-distance communication system in an LF-band.Type: ApplicationFiled: June 10, 2009Publication date: October 1, 2009Applicant: Murata Manufacturing Co., Ltd.,Inventors: Yoshihiro SAKO, Kenji NAITO, Takaaki OOI
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Patent number: 7592964Abstract: The present invention relates to a surface mounted coil (200) for wireless communication. The coil (200) comprises a wire (202) wounded about a core (204) thereby establishing a plurality of windings and having its ends terminated on mounting sections (208) at each end of the core (204). The coil (200) further comprises a shielding layer (212, 300) wound about a central part of the core (204) thereby covering said windings. The shielding layer (212, 300) comprises a shielding pattern and a contact section (214) for connecting to a ground level and to the shielding pattern.Type: GrantFiled: November 17, 2006Date of Patent: September 22, 2009Assignee: Oticon A/SInventors: Matthias Müllenborn, Frank Engel Rasmussen, Mohamad Essabar, Mogens Øllgaard, Christian Nielsen
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Publication number: 20090231227Abstract: An antenna includes a coil that is formed such that one end of the coil is short circuited or open to a ground and a current standing wave is generated when a high frequency signal is applied to another end of the coil. The coil generates a magnetic field standing wave having a frequency corresponding to the high frequency signal, and thereby detects or radiates an electromagnetic wave having the frequency.Type: ApplicationFiled: December 4, 2008Publication date: September 17, 2009Inventor: Takanori WASHIRO
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Publication number: 20090213023Abstract: A portal antenna (10) particularly suited for enabling low frequency RFID devices carried by animals to be read when animals are proceeding through a stock race or the like. The portal antenna includes a portal structure (11) through which an animal can pass and about which is wound at least one coil (18/19) of antenna conductor. At least one elongate radiator element (21) preferably projects to at least one side of the portal structure (11). Preferably the radiator(s) (21) is/are of ferrous/magnetically conductive metal. The radiator(s) can form a separate structure or be part of the wall structure of a stock race.Type: ApplicationFiled: September 19, 2006Publication date: August 27, 2009Inventors: Patrick Bernard Gunston, Kevin Paul Ford, Christopher John McLoughin, Paul Anthony Turnbull, David Low Scott
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Publication number: 20090207083Abstract: An antenna that can ensure a sufficient radio receiving level and a radio-wave receiving device on which the antenna is equipped are provided. The antenna includes a columnar magnetic core formed by a ferromagnetic body, a coil portion wound around the magnetic core, a flat-plate state extension portion extended from an end portion of the magnetic core, and a standing portion provided at least on a one-direction face of the extension portion. Such antenna is suitable for installation on a wrist-watch type radio controlled timepiece, particularly requiring a reduction in size and weight. By this arrangement, while the time display dial is more easily viewable, the radio controlled timepiece ensures that a sufficient standard-wave receiving level is provided.Type: ApplicationFiled: March 22, 2007Publication date: August 20, 2009Applicant: CITIZEN HOLDINGS CO., LTD.Inventors: Ryo Miyazaki, Nobuhiro Sato
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Publication number: 20090201771Abstract: An electronic timepiece with an internal antenna includes an outside case including a metal back cover, an antenna for receiving external radio frequency information, the antenna including a magnetic core that is long in one direction and is made from a magnetic material, and a coil that is wound around the magnetic core, a reception processor that processes the external radio frequency information received by the antenna, a module that houses the antenna and the reception processor and is housed inside the outside case, and a metal magnetic foil member that has greater magnetic permeability than the back cover and is positioned outside at least the lead-facing areas opposite the lead parts on the inside surface of the back cover facing the module. The magnetic core has a coil winding part around which is wound the coil positioned in the middle part in the lengthwise direction, and a pair of lead parts projecting from both sides of the coil winding part.Type: ApplicationFiled: January 29, 2009Publication date: August 13, 2009Applicant: SEIKO EPSON CORPORATIONInventor: Fumiaki Miyahara
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Patent number: 7573431Abstract: The broadband small antenna has equal magnetic electric proportions, circular polarization, and an isoimpedance magnetodielectric (?r??r) shell for controlled wave expansion. The shell is a radome without bandwidth limitation, with reflectionless boundary conditions to free space, providing loading and broad bandwidth antenna size miniaturization. The system is spherically structured based upon size, quality (Q) and bandwidth.Type: GrantFiled: February 13, 2006Date of Patent: August 11, 2009Assignee: Harris CorporationInventor: Francis Eugene Parsche
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Patent number: 7570223Abstract: An antenna core comprises a flexible stack of a plurality of oblong soft-magnetic strips consisting of an amorphous or nanocrystalline alloy. The strips of said antenna core are separated from one another by an electrically insulating film each. The amorphous or nanocrystalline alloy has a magnetostriction value lambdas in the range of +4 <·>10<?6> to ?4<·>10<?6> and a linear BH loop. The coefficient of induction L of the antenna core changes at 60 kHz at a center distortion by 25% of its length by less than 10% and the quality Q of the antenna core is >=10 at 60 kHz.Type: GrantFiled: July 21, 2005Date of Patent: August 4, 2009Assignee: Vacuumschmelze GmbH & Co. KGInventors: Giselher Herzer, Franz Till, Harald Hundt
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Publication number: 20090179812Abstract: An antenna apparatus is featured by that a base member 4 has an antenna unit 3 and a loop pattern 2 wound in such a manner that a magnetic field of the loop pattern 2 is generated along the same direction as that of the antenna unit 2, and the loop pattern 2 has been formed by a plurality of loops connected parallel to each other.Type: ApplicationFiled: January 7, 2009Publication date: July 16, 2009Applicant: PANASONIC CORPORATIONInventors: Kouichi NAKAMURA, Kuniaki KIYOSUE, Kenji TANIGUCHI, Naoyuki KOBAYASHI
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Patent number: 7557763Abstract: A fob for a remote keyless entry system includes a printed circuit board (PCB) located within a housing. The PCB includes a surface on which circuitry is printed and components are mounted. A coil is mounted to the surface and provides an antenna for the fob. The coil includes a frame spaced apart from the PCB to provide room for other components on the PCB. Coil mounts extend from the frame and are received by the PCB at coil mount locations. The coil mounts contact the surface of the PCB to form an electrical connection.Type: GrantFiled: September 20, 2006Date of Patent: July 7, 2009Assignee: Continental Automotive Systems US, Inc.Inventors: Duane Bilyeu, Jill Sara Logsdon, Michael J. Zaitz
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Patent number: 7557766Abstract: A portable remote controller for a tire status detector, includes a portable casing, a transmission circuit disposed in the casing, a low-pass filter disposed at an output side of the transmission circuit for permitting a signal with a frequency of not more than the first frequency to pass through the low-pass filter, a receiving circuit disposed in the casing, a high-pass filter disposed at an input side of the receiving circuit for permitting a signal with a frequency of not less than the second frequency to pass through the high-pass filter, a ferrite bar antenna housed in the casing and having a ferrite bar wound with an antenna coil, the antenna coil having two terminals, one of which being connected to the ground and the other being connected in common to the low-pass and high-pass filers and a duplexer composed of the low-pass and high-pass filters. The ferrite bar antenna is used both for transmission of the long wave signals and for receipt of the ultra high frequency signals.Type: GrantFiled: March 3, 2008Date of Patent: July 7, 2009Assignee: Pacific Industrial Co., Ltd.Inventors: Shinichi Kawase, Takashi Takeyama, Syuji Aoyama
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Publication number: 20090167624Abstract: This invention provides an antenna apparatus (60) for use in a non-contact type IC card into and from which data can be written and read by electronic apparatuses having a communication function, by virtue of inductive coupling. The antenna apparatus comprises a loop coil (61) and a magnetic member (62). The loop coil is produced by winding a conductive wire in a plane and configured to perform the inductive coupling. The magnetic member covers one region (61a) of the loop coil, provided at one side, from one surface of the loop coil, passes through the loop coil, and covers the other region (61b) of the loop coil, provided at the other side, from the other surface of the loop coil. The entire region of the loop coil is thus covered.Type: ApplicationFiled: February 6, 2009Publication date: July 2, 2009Applicants: SONY CHEMICAL &INFORMATION DEVICE CORPORATION, SONY CORPORATIONInventors: KEISUKE ARAMAKI, SATORU SUGITA, HIRAKU AKIHO
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Publication number: 20090160719Abstract: A radio frequency IC device includes a radio frequency IC chip, a feeder circuit substrate, and a radiating plate. The feeder circuit substrate includes a feeder circuit that electrically connects to the radio IC chip and that includes a resonance circuit and/or a matching circuit including inductance elements. The feeder circuit substrate is bonded to the radiating plate, which radiates a transmission signal supplied from the feeder circuit and supplies a received signal to the feeder circuit. The inductance elements are arranged in spiral patterns wound in opposite directions and couple to each other in opposite phases. The radio frequency IC device is able to obtain a radio frequency IC device that is not susceptible to being affected by a usage environment, minimizes variations in radiation characteristics, and can be used in a wide frequency band.Type: ApplicationFiled: December 17, 2008Publication date: June 25, 2009Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Noboru KATO, Jun SASAKI
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Publication number: 20090161491Abstract: An antenna device includes an antenna for receiving a time information radio wave, and an antenna support member. In the antenna, a coil is wound around a center portion of a core. In the support member, a non-magnetic portion supports two magnetic portions independently and both end portions of the core of the antenna are magnetically coupled with the magnetic portions. A radio wave controlled timepiece includes a case in an inner space of which the antenna and the support member are installed as described above. In the inner space, a time counting unit, a time display unit connected to the time counting unit, and a time updating unit configured to update the time displayed on the display unit, based on the time information radio wave received by the antenna, are installed.Type: ApplicationFiled: February 23, 2009Publication date: June 25, 2009Applicant: Casio Computer Co., Ltd.Inventors: Kaoru SOMEYA, Kazuaki Abe
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Publication number: 20090160723Abstract: A magnetic and/or magneto-electric antenna that has a plurality of conducting loops that each can be resonated at a frequency that is offset from the other loops to provide a composite band-pass response that is broader than that of the individual loops.Type: ApplicationFiled: December 18, 2008Publication date: June 25, 2009Inventors: Mark Rhodes, Brendan Hyland
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Publication number: 20090160722Abstract: A magnetic and/or magneto-electric antenna is provided that has a plurality of conducting loops. Two or more of the loops are driven by separate drivers.Type: ApplicationFiled: December 5, 2008Publication date: June 25, 2009Inventors: Mark Rhodes, Brendan Hyland
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Patent number: 7548213Abstract: The present invention relates to the technology of recognizing and reading each game chip although game chips are stacked. The present invention is a game chip storing data readable by a reader/writer having an antenna which emits an electromagnetic wave and available in a stack of game chips, and includes: an IC device for communicating data at a request from the reader/writer; an antenna electrode connected to the IC device, and configured such that the antenna electrode can enter a resonant state with an antenna of the reader/writer through an electromagnetic wave; and a reflection member for reflecting an electromagnetic wave reflected from the antenna of the reader/writer toward upper game chips in the stack.Type: GrantFiled: December 15, 2005Date of Patent: June 16, 2009Assignees: Aruze Corp., Seta Corp., Minerva Corp.Inventors: Toshimi Koyama, Nobuyuki Nonaka, Jituo Migita
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Patent number: 7545337Abstract: An antenna arrangement for the inductive transmission of energy has magnetic cores made of a composite material with amorphous or nanocrystalline flakes and a moulded plastic material, so that the magnetic properties suitable for effective energy transmission can be adjusted at the same time as high security against fracture and a small overall height are achieved.Type: GrantFiled: November 13, 2006Date of Patent: June 9, 2009Assignee: Vacuumscmelze GmbH & Co. KGInventor: Wulf Guenther
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Patent number: 7545336Abstract: An antenna coil includes: an air-core type flat coil body; and a coil support member disposed between the coil body and a substrate so that the coil body is supported on a surface of the substrate. The thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular to the axial direction of the coil body. The coil support member is made of resin hardened soft magnetic material.Type: GrantFiled: April 19, 2006Date of Patent: June 9, 2009Assignee: Denso CorporationInventor: Hiromichi Naito
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Publication number: 20090140946Abstract: Planar (two-dimensional) and volumetric (three-dimensional), metamaterial-inspired, efficient electrically-small antennas. The electric-based and magnetic-based antenna systems are shown to be naturally matched to a source and are linearly scalable to a wide range of frequencies. The systems include a radiating element that is fed by the source through a finite ground plane via a feedline and an electrically-small, one-unit cell made of a metamaterial that is adapted to match the input impedance of the antenna.Type: ApplicationFiled: October 31, 2008Publication date: June 4, 2009Inventors: Richard W. Ziolkowski, Aycan Erentok
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Patent number: 7538743Abstract: An antenna for radiating and/or receiving signals. The antenna includes (i) a first hollow and helical pipe, (ii) a second hollow and helical pipe, (iii) a first transmission wire, (iv) a second transmission wire, and (v) a dielectric connector. The dielectric connector physically couples to the first hollow and helical pipe and the second hollow and helical pipe. The first hollow and helical pipe and the second hollow and helical pipe comprise an electrically conductive material. The first transmission wire comprises a first portion and a second portion. The second transmission wire comprises a third portion and a fourth portion. The first portion of the first transmission wire and the third portion of the second transmission wire are inside the first hollow and helical pipe.Type: GrantFiled: November 15, 2007Date of Patent: May 26, 2009Assignee: International Business Machines CorporationInventor: Hyman D. Chantz
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Publication number: 20090128437Abstract: There is provided an antenna whose outside shape can be miniaturized while maintaining a gain at a desired level with respect to a radio wave of a wide frequency range. The antenna is configured by using a core of a laminate structure. The core is a plate of a rectangular outside shape, configured to have a laminate structure including each of first, second and third resin layers. The first resin layer has magnetic powder mixed therein and formed as a middle layer, and the second resin layer and the third resin layer made of resin only without magnetic powder mixed therein are formed to sandwich the first resin layer therebetween. In the core of the laminate structure, it is preferable to use a polymer resin for each of the resin layers, and to use soft ferrite powder as the magnetic powder.Type: ApplicationFiled: May 26, 2008Publication date: May 21, 2009Inventors: Kensaku Sonoda, Rikiya Kan, Kenichi Shirota, Kiyoshi Koike
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Publication number: 20090121955Abstract: An antenna coil is obtained by winding a flexible substrate around a magnetic core. Conductors are provided on the flexible substrate, whereby a first coil portion and a second coil portion are provided on either side of the magnetic core except for in a middle portion. A non-winding portion including no conductors is provided between the first coil portion and the second coil portion on a main surface of the magnetic core.Type: ApplicationFiled: January 22, 2009Publication date: May 14, 2009Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Hiroyuki KUBO, Hiromitsu ITO, Kuniaki YOSUI
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Publication number: 20090109113Abstract: An accessory comprising at least two antennas for receiving and/or transmitting radio signals on a portable electronic appliance with the help of compact and self-contained means suitable for use while mobile.Type: ApplicationFiled: October 30, 2008Publication date: April 30, 2009Applicant: ARCHOS S.A.Inventor: Henri CROHAS
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Publication number: 20090102590Abstract: An underwater connector (10) comprising a magnetic coupler for passing communications signals and/or power from one part (12) to another part (13) using magnetic coupling and without requiring direct electrically conductive contact between the parts (12, 13).Type: ApplicationFiled: February 27, 2007Publication date: April 23, 2009Applicant: WIRELESS FIBRE SYSTEMSInventors: Mark Rhodes, Brendan Hyland
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Publication number: 20090096693Abstract: An antenna includes a core formed of a high-permeability material and a coil wire wrapped around at least a part of the core. In one embodiment, the high-permeability material includes ferrite material.Type: ApplicationFiled: October 10, 2007Publication date: April 16, 2009Inventors: Rowland Jones, Jeffrey Shamblin, Sebastian Rowson, Laurent Desclos
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Publication number: 20090096694Abstract: An antenna device having a magnetic core to be surface-mounted on a circuit substrate includes a pair of coil portions spaced apart from each other at a predetermined interval. The coil portions are connected by a connecting conductor. An end of the magnetic core includes a curved or bent portion curved toward the circuit substrate. This structure defines an RFID antenna device having an improved receiving sensitivity that can be surface-mounted without increasing the thickness of a casing of a mobile electronic device.Type: ApplicationFiled: December 22, 2008Publication date: April 16, 2009Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Hiromitsu ITO, Hiroyuki KUBO, Kuniaki YOSUI
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Patent number: 7515112Abstract: An antenna device includes an antenna for receiving a time information radio wave, and an antenna support member. In the antenna, a coil is wound around a center portion of a core. In the support member, a non-magnetic portion supports two magnetic portions independently and both end portions of the core of the antenna are magnetically coupled with the magnetic portions. A radio wave controlled timepiece includes a case in an inner space of which the antenna and the support member are installed as described above. In the inner space, a time counting unit, a time display unit connected to the time counting unit, and a time updating unit configured to update the time displayed on the display unit, based on the time information radio wave received by the antenna, are installed.Type: GrantFiled: March 6, 2007Date of Patent: April 7, 2009Inventors: Kaoru Someya, Kazuaki Abe
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Publication number: 20090085820Abstract: A magnetic material used for an antenna module of an RFID (radio frequency identification) system that uses a communication frequency of 13.56 MHz, includes an Fe alloy magnetic material containing Fe as a primary component, and Si and Al added thereto, and phosphorous of 0.2 to 0.5 wt % added to the Fe alloy magnetic material.Type: ApplicationFiled: August 20, 2008Publication date: April 2, 2009Applicant: SONY CORPORATIONInventor: Hiraku Akiho
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Publication number: 20090085807Abstract: An electromagnetic tracking system comprising a transmitter coil array with two or more transmitter coils and a receiver coil array with one or more ferrite rod antennas. A transmitter or receiver coil array for an electromagnetic tracking system comprising a plurality of ferrite rod antennas positioned on a plane at different locations, with different orientations, and pointing in different directions.Type: ApplicationFiled: October 2, 2007Publication date: April 2, 2009Applicant: GENERAL ELECTRIC COMPANYInventor: Peter Traneus Anderson
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Patent number: 7511679Abstract: A magnetic sensor-type antenna comprising a magnetic core and a coil wound around the magnetic core for receiving electromagnetic waves, which is disposed in a housing such that the end portion of the magnetic core is bent away from the housing or a metal portion of the housing, and a timepiece, a keyless entry system and an RFID system each comprising such an antenna.Type: GrantFiled: November 29, 2004Date of Patent: March 31, 2009Assignee: Hitachi Metals Ltd.Inventors: Hirokazu Araki, Masahiro Mita, Chiharu Mitsumata
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Publication number: 20090079652Abstract: A portable remote controller for a tire status detector, includes a portable casing, a transmission circuit disposed in the casing, a low-pass filter disposed at an output side of the transmission circuit for permitting a signal with a frequency of not more than the first frequency to pass through the low-pass filter, a receiving circuit disposed in the casing, a high-pass filter disposed at an input side of the receiving circuit for permitting a signal with a frequency of not less than the second frequency to pass through the high-pass filter, a ferrite bar antenna housed in the casing and having a ferrite bar wound with an antenna coil, the antenna coil having two terminals, one of which being connected to the ground and the other being connected in common to the low-pass and high-pass filers and a duplexer composed of the low-pass and high-pass filters. The ferrite bar antenna is used both for transmission of the long wave signals and for receipt of the ultra high frequency signals.Type: ApplicationFiled: March 3, 2008Publication date: March 26, 2009Applicant: PACIFIC INDUSTRIAL CO., LTD.Inventors: Shinichi Kawase, Takashi Takeyama, Syuji Aoyama
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Patent number: 7508350Abstract: A highly bendable antenna core (8) which is highly bendable for high-frequency identification systems substantially retains its soft-magnetic properties when bending occurs. The antenna core is produced by using specific amorphous or nanocrystalline alloys having a very low magnetostriction value. The antenna core (8) is embodied in the form of a laminate with/or without insulating layers placed therebetween. An antenna can be provided with one such antenna core.Type: GrantFiled: July 22, 2005Date of Patent: March 24, 2009Assignee: Vacuumschmelze GmbH & Co. KGInventors: Herbert Hein, Wulf Guenther, Harald Hundt, Achim Kipper, Matthias Reidel
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Patent number: 7503509Abstract: This invention provides an antenna apparatus (60) for use in a non-contact type IC card into and from which data can be written and read by electronic apparatuses having a communication function, by virtue of inductive coupling. The antenna apparatus comprises a loop coil (61) and a magnetic member (62). The loop coil is produced by winding a conductive wire in a plane and configured to perform the inductive coupling. The magnetic member covers one region (61a) of the loop coil, provided at one side, from one surface of the loop coil, passes through the loop coil, and covers the other region (61b) of the loop coil, provided at the other side, from the other surface of the loop coil. The entire region of the loop coil is thus covered.Type: GrantFiled: June 15, 2006Date of Patent: March 17, 2009Assignees: Sony Chemical & Information Device Corp., Sony CorporationInventors: Keisuke Aramaki, Satoru Sugita, Hiraku Akiho
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Patent number: 7503491Abstract: A “coil-on-a-chip” RFID tag having an rfid integrated circuit and an antenna contemporaneously formed on a substrate. The antenna is a helical multiple layer, multi-turn coil having an axis of revolution oriented at an angle, preferably ninety degrees, with respect to the major body plane of the rfid integrated circuit. The coil has a central opening with an annular core of magnetically permeable material. The RFID tag has an increased operating range over known ID tags.Type: GrantFiled: October 29, 2005Date of Patent: March 17, 2009Assignee: Magnex CorporationInventors: Shengbo Zhu, Su Shiong Huang
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Patent number: 7501955Abstract: An RFID device includes an antenna structure that provides good performance throughout a range of different positions relative to nearby materials, such as metallic objects in a carton or other container. The antenna structure has compensation elements that interact with the nearby materials to provide good performance over the range of different positions. The compensation elements include both electrical compensation elements, which interact with the nearby materials primarily using electric fields, and magnetic compensation elements, which interact with the nearby materials primarily using magnetic fields. The electrical compensation elements and the magnetic compensation elements may be selected and may be positioned within the antenna structure such that the performance of the antenna structure is substantially unchanged (or at least acceptable) through the range of different positions.Type: GrantFiled: September 2, 2005Date of Patent: March 10, 2009Assignee: Avery Dennison CorporationInventors: Ian J. Forster, Adrian N. Farr
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Patent number: 7495626Abstract: An antenna for generating electron spin radiation corresponding to a signal from a radio frequency communications device includes a substantially cylindrical conductor, a first spiral-wound flat inductor, a second spiral-wound flat inductor and a reactive element. The first spiral-wound flat inductor is wound in relation to the second spiral-wound flat inductor so that when a current flows from the first signal terminal to the second signal terminal, a first magnetic field is generated from the first spiral-wound flat inductor and a second magnetic field is generated from the second spiral-wound flat inductor. The first magnetic field is in an opposite direction from the second magnetic field. The substantially cylindrical conductor is disposed so as to intersect the first magnetic field and the second magnetic field. The antenna may also be used to receive electron spin radiation.Type: GrantFiled: July 12, 2005Date of Patent: February 24, 2009Assignee: HZ Antenna, LLCInventors: Robert T. Hart, Vladimir I. Korbejnikov
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Patent number: 7495625Abstract: A soft magnetic member which is formed by a composite of an organic object to satisfy a predetermined relationship with an antenna area, a circumference length, and a magnetic transmission ratio and a conductive member are provided between an antenna coil which is formed by at least one loop and a metal surface of the conductive member such as a metal casing. The magnetic flux which invades into the conductive object is blocked by the soft magnetic member and the conductive member so as to restrict the influence thereof.Type: GrantFiled: January 17, 2003Date of Patent: February 24, 2009Assignee: Mitsubishi Materials CorporationInventors: Takanori Endo, Seirou Yahata, Takashi Tsuchida