Including Magnetic Material Patents (Class 343/787)
  • Patent number: 8638268
    Abstract: The disclosure describes a compact coil antenna that can operate even if the coil antenna is arranged closely to its conductor plate, and that has a high degree of coupling with a target antenna. A lower coil conductor part and an upper coil conductor part each have a substantially rectangular and spiral form, and the inner end of the lower coil conductor part connects to the inner end of the upper coil conductor part to be connected in series to the inner end of the upper coil conductor part. In the lower coil conductor part and the upper coil conductor part, the arrangement interval in parallel-to-axis parts including segments that are parallel to the direction of the axis of a magnetic-material core is shorter than the arrangement interval of segments in orthogonal-to-axis parts that are orthogonal to the axis of the magnetic-material core.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: January 28, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kuniaki Yosui, Hiroyuki Kubo, Hiromitsu Ito
  • Patent number: 8624790
    Abstract: The present invention relates to a porous magnetic antenna, comprising: an antenna; an insulating layer, having one side next to said antenna; and a magnetic layer, placed next to the other side of the insulating layer, separated from said antenna with a distance, and having at least one hole. The porous magnetic antenna has the advantages of shaping the field pattern, lowering the sensitivity, improving the gain value and possessing stable directionality.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: January 7, 2014
    Assignee: Mingchi University of Technology
    Inventors: Wen-Cheng Lai, Ching-Wen Hsue, Li-Ming Lo
  • Publication number: 20130342414
    Abstract: An antenna is fabricated using an M-type hexaferrite, such as a tin (Sn) and zinc (Zn) substituted M-type strontium hexaferrite (Sn/Zn-substituted SrM: SrFe12?2xZnxSnxO19), thereby enabling antenna miniaturization, broad bandwidth, and high gain. In one embodiment, an antenna system has a substrate and a chip antenna formed on the substrate. The system also has a conductive radiator contacting the chip antenna, and the chip antenna comprises an M-type strontium hexaferrite for which Fe cations are substituted with tin (Sn) and zinc (Zn) to achieve soft magnetic properties for the antenna. Thus, the coercivity and permeability are lower and higher, respectively, than those of pure SrM. Such fabricated hexaferrite chip antennas have broadband characteristics and show good radiation performance at various frequencies, including in the GHz frequency range.
    Type: Application
    Filed: November 15, 2011
    Publication date: December 26, 2013
    Inventors: Yang-Ki Hong, Seok Bae, Jae-Jin Lee
  • Publication number: 20130342413
    Abstract: Antenna structures made of bulk-solidifying amorphous alloys and methods of making antenna structures from such bulk-solidifying amorphous alloys are described. The bulk-solidifying amorphous alloys providing form and shape durability, excellent resistance to chemical and environmental effects, and low-cost net-shape fabrication for the highly intricate antenna shapes.
    Type: Application
    Filed: December 3, 2012
    Publication date: December 26, 2013
    Inventors: Yun-Seung Choi, James Kang
  • Patent number: 8614648
    Abstract: An antenna module and methods for manufacturing an antenna module, the antenna module including a magnetic material sheet for focusing a magnetic flux, an antenna conductor deposited on the magnetic material sheet and formed in a predetermined pattern, and a protection layer deposited on the antenna conductor for protecting the antenna conductor.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: December 24, 2013
    Assignee: Maruwa Co., Ltd.
    Inventor: Yasushi Kojima
  • Patent number: 8608975
    Abstract: Disclosed are a ferrite for high-frequency applications and a manufacturing method thereof. The ferrite comprises the elements Mg, Cu, Fe, and O, in which the elements have a composition ratio represented by the formula Mg1-xCuxFe2O4, wherein x has a value of 0.1 or less.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: December 17, 2013
    Assignee: EMW Co., Ltd.
    Inventors: Byung Hoon Ryou, Won Mo Sung, Sang Hoon Park
  • Patent number: 8604992
    Abstract: A spiral coil conductor defining its winding central section as a conductor opening section is formed on a flexible substrate. The flexible substrate has a U shaped bend along a line passing through the conductor opening section so as to envelop a magnetic material core. The magnetic material core is arranged in a state where its end face faces the bend of the flexible substrate, and the magnetic material core includes cut shapes provided at a portion of the end face. The portion at the end face faces coil conductor sections at the bend of the flexible substrate, and the cut shapes separate the portion apart from the coil conductor sections.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: December 10, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Eiichi Kobayashi, Takuma Sawaya, Hiroyuki Kubo
  • Patent number: 8604993
    Abstract: In an antenna coil including a first magnetic core, a second magnetic core, and a flexible board, coil conductors are provided on a surface of the flexible board. By winding the flexible board around the first magnetic core and the second magnetic core, a first coil portion is disposed around the first magnetic core, and a second coil portion is disposed around the second magnetic core. The winding direction of the second coil portion is opposite to that of the first coil portion. The first coil portion and the second coil portion are connected to define one coil as a whole.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: December 10, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kuniaki Yosui, Hiroyuki Kubo, Hiromitsu Ito
  • Publication number: 20130321230
    Abstract: Active load modulation antennas for contactless systems typically require the presence of a battery power source in the transponder device. The transponder typically cannot be powered by the reader device alone and also transmit an active load modulation signal. Embodiments in accordance with the invention are disclosed that allow transponder devices to transmit an active load modulation signal when powered only by the reader in the contactless system.
    Type: Application
    Filed: May 29, 2012
    Publication date: December 5, 2013
    Applicant: NXP B.V.
    Inventors: Erich MERLIN, Christoph CHLESTIL, Michael GEBHART
  • Patent number: 8594584
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, a tuning system for a communication device having an antenna, where the tuning system includes at least one first tunable element connected with at least one radiating element of the antenna for tuning the antenna where the adjusting of the at least one first tunable element is based on at least one of a use case associated with the communication device and location information associated with the communication device, and a matching network having at least one second tunable element coupled at a feed point of the antenna, wherein the matching network receives control signals for adjusting the at least one second tunable element to tune the matching network. Additional embodiments are disclosed.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: November 26, 2013
    Assignee: Blackberry Limited
    Inventors: Matthew R. Greene, Keith R. Manssen, Gregory Mendolia
  • Patent number: 8581796
    Abstract: The present invention relates to an antenna using a complex structure in which dielectric substances having a low dielectric constant and magnetic substances having a high magnetic permeability are arranged vertically and periodically in order to improve the gain, efficiency, and bandwidth of the antenna while maintaining a small size which is an advantage of a conventional antenna using dielectric substances having a high dielectric constant. The present invention provides the antenna using a complex structure having a vertical and periodic structure of dielectric substances and magnetic substances, comprising a substrate and a radiation patch formed on the substrate. The substrate includes a plurality of layers. Each of the layers has the dielectric substances and the magnetic substances of a bar shape alternately arranged therein and has the dielectric substances and the magnetic substances alternately laminated thereon even in a height direction.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: November 12, 2013
    Assignee: EMW Co., Ltd.
    Inventors: Byung Hoon Ryou, Won Mo Sung, Jeong Keun Ji
  • Patent number: 8564493
    Abstract: A method of making Y-type hexagonal ferrite and an antenna using the same are provided. Y-type hexagonal ferrite includes a base ferrite composed of iron oxide, barium carbonate and cobalt oxide, and silicate glass ranging from 0.5 to 5 weight percent added to 100 weight percent of base ferrite. An antenna apparatus includes a magnetic carrier and an antenna pattern formed thereon. The magnetic carrier is formed of such Y-type hexagonal ferrite, and the antenna pattern resonates in a specific frequency band when electric power is supplied. To fabricate the Y-type hexagonal ferrite, a calcination process is performed in which iron oxide, barium carbonate and cobalt oxide are combined into base ferrite at a given calcination temperature after being mixed. A sintering process is performed to sinter the base ferrite and the silicate glass at a given sintering temperature which is lower than the calcination temperature after adding the silicate glass to the base ferrite.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: October 22, 2013
    Assignees: Samsung Electronics Co, Ltd., SUNGKYUNKWAN UNIVERSITY Foundation for Corporate Collaboration
    Inventors: Joong Hee Lee, Young Ho Han, Il Jeong Park
  • Publication number: 20130265205
    Abstract: The present invention relates to a folded dipole antenna comprising a magnetic material comprising a hexagonal Z-type ferrite and/or a hexagonal Y-type ferrite as a main component in which a radiation element and a reflection element each having a folded dipole structure are disposed, and an RF tag comprising the folded dipole antenna and an IC chip connected to the folded dipole antenna. The RF tag according to the present invention has a smaller size than that of the conventional RF tags and is not susceptible to adverse influence from ambient environments, and can be operated at an UHF band or surrounding frequency bands thereof.
    Type: Application
    Filed: November 10, 2011
    Publication date: October 10, 2013
    Applicant: TODA KOGYO CORPORATION
    Inventors: Yoji Okano, Tetsuya Kimura, Kazumi Yamamoto, Takanori Doi, Yoshiro Sato
  • Publication number: 20130267170
    Abstract: An antenna and a mobile terminal having the antenna are discussed. According to an embodiment, the antenna can include a flexible board having a first region and a second region; a high frequency antenna pattern formed in the first region of the flexible board to transceive a wireless signal by detecting a magnetic flux; a low frequency antenna pattern formed in the second region of the flexible board to generate an induced current; and a magnetic sheet stacked on one surface of the flexible board to simultaneously cover both of the high frequency antenna pattern and the low frequency antenna pattern, the magnetic sheet having a high magnetic permeability for both a high frequency and a low frequency.
    Type: Application
    Filed: November 26, 2012
    Publication date: October 10, 2013
    Applicant: LG ELECTRONICS INC.
    Inventors: Kabsung CHONG, Jongoh KIM, Youngtae KIM, Mizi YI, Kiwon HAN, Euntaek JEOUNG
  • Patent number: 8519897
    Abstract: A low-profile antenna assembly includes at least two antennas co-located under a cover. At least one of the at least two antennas includes an antenna configured for use with AM/FM radio. And, at least one of the at least two antennas includes an antenna configured for use with at least one or more of SDARS, GPS, cell phones, Wi-Fi, DAB-VHF-III, DAB-L, etc.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: August 27, 2013
    Assignee: Laird Technologies, Inc.
    Inventors: Ayman Duzdar, Gary Keith Reed, Thomas Arthur Shirley, David Allen Swartwood
  • Patent number: 8514141
    Abstract: A low frequency inductive two-way radio transceiver tag is provided that has separate antennas for transmitting and receiving signals within a reading volume. Thus, the tag of the invention includes both a transmit antenna and a receiving antenna, either separately or as a single antenna tuneable between two functional states with different impedances. The impedance of the receiving antenna is greater than the impedance of the transmitting antenna. For example, the impedance of the receiving antenna may be greater than the impedance of the transmitting antenna by a factor of 103.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: August 20, 2013
    Assignee: Visible Assets, Inc.
    Inventors: M. Jason August, John K. Stevens, Paul Waterhouse
  • Patent number: 8507072
    Abstract: An antenna apparatus used in a wireless communication medium or a wireless communication medium processing apparatus constructed by a constitution of including a magnetic member in which a magnetic ceramic powder is used as a major component thereof and which is provided with flexibility; an antenna formed at a surface or inside of the magnetic member, and a matching circuit of the antenna formed at the surface or the inside of the magnetic member.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: August 13, 2013
    Assignee: Panasonic Corporation
    Inventors: Hidetsugu Fujimoto, Kengo Shiiba, Hiromi Sakita, Kouji Nishimura, Hatsuhiro Yano, Yoshihiko Takayama, Yoshitaka Mizoguchi, Yumie Watanabe
  • Patent number: 8508423
    Abstract: The present invention provides a small antenna device realizing both miniaturization including lower profile and a broader band in a frequency band of hundreds MHz to 5 GHz and which can be mounted on a small device such as a cellular phone. An antenna device includes: a finite ground plane; a rectangular conductor plate provided above the finite ground plane, whose one side is connected to the finite ground plane, and having a bent portion substantially parallel with the one side; an antenna disposed substantially parallel with the finite ground plane above the finite ground plane, extending in a direction substantially perpendicular to the one side, and having a feeding point positioned near the other side facing the one side of the rectangular conductor plate; and a magnetic material provided in at least a part of space between the finite ground plane and the antenna.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: August 13, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomohiro Suetsuna, Makoto Higaki, Kouichi Harada, Seiichi Suenaga, Mitsuru Ishibashi, Maki Yonetsu
  • Publication number: 20130194147
    Abstract: A patch antenna as an antenna device comprises an antenna electrode, a ground portion, an antenna substrate and a feed point. A feed angle Fang which is an angle of the feed point is larger than a characteristic curve of a feed angle of a patch antenna having an antenna substrate composed of only a dielectric in terms of the feed angle with respect to a shortening rate based on a relative permittivity and a relative magnetic permeability of the antenna substrate. The feed angle is an angle based on a middle axis between long and short axes in a direction of rotation from the short axis to the long axis around a central point of the plane of the antenna electrode. The long axis is a current route which is the longest in the antenna electrode and the short axis is orthogonal thereto.
    Type: Application
    Filed: January 28, 2013
    Publication date: August 1, 2013
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Hiroki YOSHIOKA
  • Publication number: 20130187819
    Abstract: A magnetic sheet that is omnidirectionally flexible, particularly one that is thin, reliably divided into small fragments and has flexibility, is fired in a planar shape. A magnetic sheet of the claimed invention includes: a magnetic body; a protective member provided on at least one face of the magnetic body; and a plurality of holes provided in at least one face of the magnetic body. The magnetic body is divided into a plurality of small fragments using the plurality of holes. The plurality of small fragments vary in shape.
    Type: Application
    Filed: January 18, 2013
    Publication date: July 25, 2013
    Applicant: PANASONIC CORPORATION
    Inventor: PANASONIC CORPORATION
  • Patent number: 8493269
    Abstract: A magnetodielectric substrate includes a first dielectric layer, a second dielectric layer, conductive patterns, and a plurality of air vias. The first dielectric layer has a predetermined height, and the second dielectric layer is stacked on the first dielectric layer. Conductive patterns are coated on an upper surface and a lower surface of one of the first and second dielectric layers. A plurality of air vias is formed with a predetermined diameter and a predetermined interval such that they pass through up to the conductive patterns of the upper and lower surfaces from the dielectric layer on which the conductive patterns are coated.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: July 23, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soo-Yong Jang, Austin Kim, Jae-Ho Lee, Young-Soon Lee, Ui-Jung Kim
  • Publication number: 20130176186
    Abstract: The present invention relates to active electronically scanned array antennas. A thin, low cost design is provided by coupling electromagnetic energy into periodically driven long slots (205) using circulators with integrated probes (107). The long slots (205) are formed as grooves (114) in a conductive base plate (103), each groove (114) bracketed on both sides by conductive strips (108). The circulators with integrated probes (107) are installed between the conductive strips (108) and the base plate (103), to reduce fabrication costs of the machined parts and to facilitate the making of connections between the circulators and the antenna electronics. The probes (128) protrude partway into the slots (205) and provide coupling to waves propagating in free space.
    Type: Application
    Filed: January 11, 2012
    Publication date: July 11, 2013
    Inventors: Robert G. Yaccarino, James A. Carr, Rohn Sauer, Thomas C. Da Veiga, John A. Crockett, JR., Steven E. Bradshaw, John M. Hadden, IV, Lonny Richard Walker
  • Patent number: 8475922
    Abstract: According to one embodiment, there is provided a nanoparticle composite material, including nanoparticle aggregates in a shape having an average height of 20 nm or more and 2 ?m or less and having an average aspect ratio of 5 or more, the nanoparticle aggregates including metal nanoparticles having an average diameter of 1 nm or more and 20 nm or less and containing at least one magnetic metals selected from the group consisting of Fe, Co and Ni and binder existing between the nanoparticle aggregates.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: July 2, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomohiro Suetsuna, Seiichi Suenaga, Tomoko Eguchi, Koichi Harada, Maki Yonetsu, Yasuyuki Hotta, Toshihide Takahashi
  • Publication number: 20130113662
    Abstract: In antenna device, a coil conductor of an antenna coil module and a conductor layer at least partially overlap. A current flows in the conductor layer to block a magnetic field generated by a current flowing in the coil conductor. A current flows along the periphery of a slit and around the periphery of the conductor layer due to a cut-edge effect. Since magnetic flux does not pass through the conductor layer, magnetic flux attempts to bypass the conductor layer along a path in which the conductor opening of the conductor layer is on the inside and the outer edge of the conductor layer is on the outside. As a result, the magnetic flux generates large loops that link the inside and the outside of a coil conductor of an antenna on a reader/writer side to couple an antenna device and the antenna on the reader/writer side.
    Type: Application
    Filed: September 6, 2012
    Publication date: May 9, 2013
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Noboru KATO, Katsumi TANIGUCHI, Jun SASAKI, Naoki GOCHI
  • Publication number: 20130099994
    Abstract: In an antenna apparatus, a first current is induced in a first booster conductor by a current flowing through a coil conductor of a power feed antenna, and the first current circulates along a circumference of the first booster conductor. A second current is induced in a second booster conductor by the current flowing through the coil conductor of the power feed antenna, and the second current circulates along a circumference of the second booster conductor. A third current is induced in the first booster conductor by the second current flowing through the second booster conductor, and the third current circulates along the circumference of the first booster conductor. Thus, the antenna apparatus is much less influenced by nearby metallic objects and a shape of an included radiation plate may be more freely determined without requiring a highly accurate positional relationship between the radiation plate and the coil conductor.
    Type: Application
    Filed: December 6, 2012
    Publication date: April 25, 2013
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Murata Manufacturing Co., Ltd.
  • Patent number: 8420188
    Abstract: A resin member fitting structure including a first resin member, which is a rectangular hollow tube, has at least one inner wall surface. A second resin member, which is a hollow or solid rectangular tube, has at least one outer wall surface fitted to the at least one inner wall surface of the first resin member. The inner wall surface of the first resin member and the outer wall surface of the second resin member come into contact with each other and define at least one set of fitting surfaces. The second resin member has a hygroscopic expansion coefficient that is smaller than that of the first resin member. The at least one fitting surface includes a plurality of recess-projection engagement structures spaced apart from each other in a circumferential direction that intersects a longitudinal direction of the first and second resin members.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 16, 2013
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Masaki Kawashima, Shinji Hasegawa, Giko Makino
  • Publication number: 20130088401
    Abstract: The invention relates to an antenna core, an antenna comprising an antenna core, and to methods for producing an antenna core and an antenna. The antenna core used in each case consists of a continuous soft-magnetic strip having a plurality of layers which are stacked one on top of the other and each of which is formed by a section of the strip. The layers are connected to one another by curved sections of the strip at end regions of the antenna core.
    Type: Application
    Filed: January 28, 2011
    Publication date: April 11, 2013
    Applicant: Vacuumschmelze GmbH & CO KG
    Inventors: Johannes Binkofski, Markus Brunner, Klemens Trabold, Ralf Koch
  • Patent number: 8410989
    Abstract: An antenna for receiving electromagnetic waves in a desired frequency band, includes a radiating conductor and a ground conductor, a feeder part, a wavelength-shortening section, and a magnetic field applying section. The radiating conductor and a ground conductor resonate at a resonance point frequency. The feeder part is configured to feed the radiating conductor with electricity. The wavelength-shortening section in which a magnetic body having both a dielectric property and a magnetic property is disposed close to the radiating conductor shifts the resonance point frequency into a band lower than the desired frequency band by a wavelength-shortening effect obtained based on the dielectric property and the magnetic property. The magnetic field applying section is configured to apply a magnetic field to the magnetic body so as to reduce a magnetic loss due to the magnetic body.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: April 2, 2013
    Assignee: Sony Corporation
    Inventors: Masatoshi Hayakawa, Kiyotada Yokogi, Yoshimi Takahashi, Kenji Asakura, Shuichi Goto
  • Publication number: 20130076585
    Abstract: An antenna device for generating a reconfigurable high-order mode conical beam, includes a micro-strip radiator having multiple feeding points, wherein one of the feeding points is a fixed feeding point, and a feeding unit for providing two signals having a same amplitude and a preset phase difference, wherein one of the two signals is fed through the fixed feeding point and the other is fed through any one of remaining feeding points. A mode reconfigurable switching unit, connected to the feeding unit, performs a switching operation to select any one of the remaining feeding points so that the other signal is feed through the selected feeding point in accordance with mode control data.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 28, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventor: Joung Myoun KIM
  • Patent number: 8405565
    Abstract: An antenna coil includes a magnetic layer such as a flat magnetic sheet, a transmission coil portion defined by a coiled conductor, a reception coil portion defined by a coiled conductor, a transmission coil connection defined by the conductor and defining a portion of the transmission coil portion, and a reception coil connection defined by the conductor and defining a portion of the reception coil portion. The transmission coil portion and the reception coil portion are at least partly formed side by side on the magnetic layer and are arranged to be connected to a wiring pattern on an external circuit.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: March 26, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki Kubo, Hiromitsu Ito, Kuniaki Yosui
  • Patent number: 8399960
    Abstract: A plurality of semiconductor chips are juxtaposed, each having an electromagnetic induction coil disposed thereon. A signal is transmitted by way of electromagnetic induction between the electromagnetic induction coils disposed on a pair of adjacent semiconductor chips.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: March 19, 2013
    Assignee: NEC Corporation
    Inventors: Yoshihiro Nakagawa, Koichiro Noguchi, Yoshio Kameda, Masayuki Mizuno
  • Patent number: 8395552
    Abstract: A broadband integrated circulator antenna (BICA) module for receiving and transmitting signals with high efficiency and high gain. The BICA can have a bandwidth of over 70% of a radar band and can operate in frequencies from UHF to S-band and above. The BICA has a stack configuration that includes a low profile antenna, a reflecting layer or a metamaterial substrate layer, and a circulator. The circulator is placed proximal to antenna, which greatly reduces the size of the BICA. The circulator can be a stripline Y-junction ferrite circulator and the antenna can be a coaxial center fed bow-tie antenna. The reflecting layer or metamaterial substrate layer can comprise electronic bandgap metamaterial and a high permeability ferrite substrate. The high permeability ferrite substrate can be cobalt substituted Z-type barium hexaferrite.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: March 12, 2013
    Assignees: Metamagnetics, Inc., Northeastern University
    Inventors: Anton L. Geiler, Carmine Vittoria, Vincent G. Harris
  • Patent number: 8390524
    Abstract: An antenna device including: an antenna unit having an oscillating body capable of oscillating at a predetermined natural frequency and being displaceable by an external magnetic field, and a converter for converting motion of the oscillating body to an electrical signal, when a radio wave signal having a frequency band for inducing resonance of the oscillating body comes, the oscillating body resonating with a magnetic field component of the radio wave signal, the converter converting resonance of the oscillating body to the electrical signal, and an electrical signal corresponding to the radio wave signal being outputted; a sensitivity varying section capable of varying degree of displacement of the oscillating body occurring by the external magnetic field; and a sensitivity controller for adjusting the degree of the displacement by using the sensitivity varying section in accordance with the electrical signal outputted from the antenna unit.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: March 5, 2013
    Assignee: Casio Computer Co., Ltd.
    Inventor: Kaoru Someya
  • Publication number: 20130050042
    Abstract: Provided is a cobra antenna including a relay unit forming a feeding point; an antenna element formed from a plate-like conductor that is electrically connected to one terminal of the relay unit and, when a wavelength of radio waves is represented as ?, has a surface area capable of obtaining a length of ?/4 as a path through which a current generated by reception of the radio waves flows to the one terminal of the relay unit; a coaxial line having one end electrically connected to the other terminal of the relay unit; and a first ferrite core that is provided at a position away from the other terminal of the relay unit to which the one end of the coaxial line is connected by a length of about ?/4, and through which the coaxial line penetrates or is wound around.
    Type: Application
    Filed: April 22, 2011
    Publication date: February 28, 2013
    Applicant: SONY CORPORATION
    Inventors: Yoshitaka Yoshino, Satoru Tsuboi
  • Publication number: 20130050041
    Abstract: Disclosed are synthetic garnets and related devices that can be used in radio-frequency (RF) applications. In some embodiments, such RF devices can include garnets having reduced or substantially nil Yttrium or other rare earth metals. Such garnets can be configured to yield high dielectric constants, and ferrite devices, such as TM-mode circulators/isolators, formed from such garnets can benefit from reduced dimensions. Further, reduced or nil rare earth content of such garnets can allow cost-effective fabrication of ferrite-based RF devices. In some embodiments, such ferrite devices can include other desirable properties such as low magnetic resonance linewidths. Examples of fabrication methods and RF-related properties are also disclosed.
    Type: Application
    Filed: May 30, 2012
    Publication date: February 28, 2013
    Applicant: SKYWORKS SOLUTIONS, INC.
    Inventors: David Bowie CRUICKSHANK, Rickard Paul O'DONOVAN, Iain Alexander MACFARLANE, Brian MURRAY, Michael David HILL
  • Patent number: 8378908
    Abstract: An electromagnetic antenna for Measurement-While-Drilling (MWD) applications is disclosed. The antenna can include several array elements that can act alone or together in various measurement modes. The antenna elements can be disposed in tool body recesses to be protected from damage. The antenna elements can include a ferrite plate crossed or looped by independent current carrying conductors in two or more directions forming a bi-directional or crossed magnetic dipole. Although disclosed as a MWD system conveyed by a drill string, basic concepts of the system are applicable to other types of borehole conveyance.
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: February 19, 2013
    Assignee: Precision Energy Services, Inc.
    Inventors: Macmillan M. Wisler, Larry W. Thompson, Jian-Qun Wu, Michael S. Spencer
  • Publication number: 20130038497
    Abstract: A method for manufacturing an antenna is disclosed, and the method includes the steps of: providing a wire and a stamping tool, stamping the wire into a flat antenna pattern by the stamping tool, providing a ferrite plate with the antenna pattern attached to the ferrite plate.
    Type: Application
    Filed: July 13, 2012
    Publication date: February 14, 2013
    Applicants: AAC TECHNOLOGIES HOLDINGS INC., AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
    Inventors: JungHoon Chae, JungMin Kim
  • Publication number: 20130033406
    Abstract: A method for manufacturing an antenna includes the steps of: providing a ceramic substrate and forming an antenna pattern on the ceramic substrate using screen printing with metallic material; firing the ceramic substrate and the antenna pattern by a high temperature; treating the ceramic substrate by chemical wet-etching process; pasting an adhesive tape to the antenna pattern, then detaching the antenna pattern from the ceramic substrate, and the combination of the adhesive tape with the antenna pattern forming a conductor tape; making the conductor tape attached to a first face of a ferrite plate.
    Type: Application
    Filed: June 25, 2012
    Publication date: February 7, 2013
    Applicants: AMERICAN AUDIO COMPONENTS INC., AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
    Inventors: JungHoon Chae, JungMin Kim
  • Publication number: 20130033405
    Abstract: An antenna comprises a ring-shaped radiofrequency resonator that defines a path for a circulating magnetic current. In an implementation, the resonator has a height of no more than 2% of an operating wavelength, and it has an electromagnetic resonance at the operating frequency. In an implementation, the antenna is of a type having a vertical, short electric dipole radiation or sensitivity pattern. It comprises, as the dominant radiative element, a ring of material disposed transverse to the vertical dipole axis and having an average magnetic permeability more than ten times the magnetic permeability of air. The ring has a maximum outer diameter and a height that is less than the maximum outer diameter. The antenna further includes a feed structure adapted to couple radiofrequency energy into and/or out of a magnetic current circulating in the ring.
    Type: Application
    Filed: August 1, 2011
    Publication date: February 7, 2013
    Inventor: Howard R. Stuart
  • Publication number: 20130033407
    Abstract: A method for manufacturing an antenna is disclosed, and the method includes the steps of: providing a ceramic substrate and forming an antenna pattern on the ceramic substrate using screen printing with metallic material, co-firing the ceramic substrate and the antenna pattern by a high temperature, treating the ceramic substrate by chemical wet-etching process, providing a ferrite plate with an adhesive layer disposed on a first face thereof, pasting the ceramic substrate to the ferrite plate with the antenna pattern attached to the adhesive layer, and detaching the ferrite plate from the ceramic substrate with the antenna pattern remained on the ferrite plate.
    Type: Application
    Filed: June 25, 2012
    Publication date: February 7, 2013
    Applicants: AMERICAN AUDIO COMPONENTS INC., AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
    Inventors: JungHoon Chae, JungMin Kim
  • Patent number: 8368615
    Abstract: The device, a conformal antenna, includes an antenna element directly coupled to a layer of gyrotropic material and means for creating a magnetic field, the magnetic field having a component substantially perpendicular to, and passing through, the layer of gyrotropic material and the antenna element. The gyrotropic material may be at least partially disposed on a ground plane and may comprise a material such as yttrium iron garnet. The means for creating a magnetic field can be located within the layer of gyrotropic material and may comprise at least one external magnet. The reflective metal ground plane can be the outer surface of a vehicle. The antenna element could have a dipole antenna configuration, and can produce a wave that is linearly polarized. The operation of the device may be at or above the resonant frequency of the gyrotropic material.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: February 5, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Brock David, Thomas O. Jones, III
  • Publication number: 20130021215
    Abstract: An injection-molded and in-mold decorated article with an antenna includes an injection molded article, a decorative film which covers and decorates at least one part of an outer surface of the injection molded article, a planar antenna arranged between the injection molded article and the decorative film, and a thickness absorbing sheet arranged between the planar antenna and the injection molded article so as to cover the whole planar antenna to absorb a thickness of the planar antenna. The decorative film, the planar antenna, and the thickness absorbing sheet are integrally formed through injection molding simultaneous decoration. Since the thickness absorbing sheet absorbs concavo-convex shapes of an antenna pattern, quality of an appearance design can be improved in the injection-molded and in-mold decorated article with the antenna provided for a communication function of a small mobile device.
    Type: Application
    Filed: January 18, 2011
    Publication date: January 24, 2013
    Inventors: Takahiro Suzuki, Shuzo Okumura, Takafumi Minami
  • Patent number: 8358250
    Abstract: 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: Grant
    Filed: June 10, 2009
    Date of Patent: January 22, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yoshihiro Sako, Kenji Naito, Takaaki Ooi
  • Patent number: 8354971
    Abstract: 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: Grant
    Filed: January 18, 2012
    Date of Patent: January 15, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hiromitsu Ito, Hiroyuki Kubo, Kuniaki Yosui
  • Publication number: 20120326937
    Abstract: An apparatus comprising: a deformable antenna configured to operate in a first physical configuration and configured to operate in a second physical configuration that is deformed relative to the first physical configuration; and magnetic material located in close proximity to the deformable antenna and configured to have a first physical configuration when the deformable antenna is in its first physical configuration and configured to have a second physical configuration that is deformed relative to the first physical configuration when the deformable antenna is in its second physical configuration, wherein the magnetic material when in its first physical configuration has a first magnetic permeability and when in its second physical configuration has a second magnetic permeability.
    Type: Application
    Filed: November 19, 2009
    Publication date: December 27, 2012
    Applicant: NOKIA CORPORATION
    Inventors: Markku Anttoni Oksanen, Pekka Martti Tapio Ikonen, Jussi Olavi Rahola, Jaakko Timonen, Reijo Lehtiniemi, Markku Heino
  • Publication number: 20120326886
    Abstract: A telemetry head for communication with an implantable medical device comprises a telemetry antenna and a shield substantially surrounding at least a portion of the antenna, the shield having a coating comprising a ferromagnetic material applied to at least a portion of the shield, wherein the coating is configured to shield at least the portion of the telemetry antenna from electromagnetic interference fields while permitting telemetry signals to pass through the coating.
    Type: Application
    Filed: June 24, 2011
    Publication date: December 27, 2012
    Applicant: Medtronic, Inc.
    Inventors: Gerald M. Herman, David R. Walsh, Richard O. Berg, Lester O. Stener
  • Publication number: 20120319911
    Abstract: A wide bandwidth antenna, wherein, at least an antenna module is provided on a substrate, said antenna module includes a plurality of antenna elements having spiral geometric patterns, that are connected one by one in series. Each antenna element is formed by an electrically conductive trace winding from outside said spiral geometric pattern to inside, then it winds back from inside to outside. A first antenna element in the antenna module is connected to a signal input terminal, and that is connected electrically to a signal transmission line.
    Type: Application
    Filed: December 20, 2011
    Publication date: December 20, 2012
    Applicant: UNICTRON TECHNOLOGIES CORPORATION
    Inventor: CHIH-SHEN CHOU
  • Publication number: 20120320715
    Abstract: A sensitivity adjustment device adjusts radio wave sensitivity of an antenna which wirelessly transmits/receives a signal to/from an external device. The sensitivity adjustment device includes a case and a ring-shaped rotating member. The case houses the antenna. The rotating member is disposed on the outside of the case in such a way as to be rotatable. The rotating member includes (a) a shielding part which shields a radio wave and (b) a penetration part which allows penetration of a radio wave. A positional relationship between (a) the antenna and (b) the shielding part and the penetration part is changed by rotation of the rotating member so that the radio wave sensitivity of the antenna is adjusted.
    Type: Application
    Filed: June 13, 2012
    Publication date: December 20, 2012
    Applicant: CASIO COMPUTER CO., LTD.
    Inventor: Yoshihiro MARUYAMA
  • Publication number: 20120313834
    Abstract: An antenna device attains good antenna performance using at least one or more metal members installed in a portable terminal The antenna device includes a main board equipped with a power supply part for supplying power, a slot part which is positioned in at least one or more metal members or is formed by a combination of the metal members, and a power supply antenna member for receiving power from the power supply part and which is electromagnetically coupled with the slot part.
    Type: Application
    Filed: March 30, 2012
    Publication date: December 13, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-Jin EOM, Hoon PARK, Ho-Saeng KIM, Austin KIM, Yong-Jin KIM, Chi-Hyung AHN
  • Patent number: 8325100
    Abstract: Antenna structures made of bulk-solidifying amorphous alloys and methods of making antenna structures from such bulk-solidifying amorphous alloys are described. The bulk-solidifying amorphous alloys providing form and shape durability, excellent resistance to chemical and environmental effects, and low-cost net-shape fabrication for the highly intricate antenna shapes.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: December 4, 2012
    Assignee: Crucible Intellectual Property, LLC
    Inventors: Yun-Seung Choi, James Kang