Plural Patents (Class 343/770)
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Patent number: 7640887Abstract: The present invention provides a surface wave excitation plasma generator in which surface wave excitation plasma is efficiently generated. A surface wave excitation plasma generator including an annular waveguide and a dielectric tube is provided. The annular waveguide 2 includes an inlet 2a for introducing a microwave M, an end plate 2b for reflecting the microwave M introduced and propagating within the waveguide, and a bottom plate 2c on which slot antennas 2d are formed at a predetermined interval. When the wavelength of the microwave M in the waveguide is ?g, the length from position b through positions c, d, e to position f on the bottom plate 2c, i.e. the circumferential length (?×D1) of the annular waveguide, is set as 2 ?g, and the positions b, c, d, e, f are spaced apart at an interval of ?g/2. Since the slot antennas 2d are arranged at two positions c and e, the interval between these two slot antennas 2d is equal to the wavelength ?g in the waveguide.Type: GrantFiled: April 20, 2006Date of Patent: January 5, 2010Assignee: Shimadzu CorporationInventor: Masayasu Suzuki
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Publication number: 20090322639Abstract: An antenna apparatus including a metal layer, a first planar antenna, a second planar antenna and a conducting wire is provided. The first planar antenna has a first ground terminal electrically connected to the metal layer. The second planar antenna has a second ground terminal electrically connected to the metal layer. The conducting wire is connected between the first planar antenna and the second planar antenna. In the whole operation, electromagnetic signals transmitted by the first planar antenna and the second planar antenna are in the same frequency band, and the coupling effect of the first planar antenna and the second planar antenna is reduced along with the formation of a current loop of the conducting wire.Type: ApplicationFiled: June 16, 2009Publication date: December 31, 2009Applicant: ASUSTeK COMPUTER INC.Inventor: Ming-Iu Lai
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Publication number: 20090322636Abstract: Described are a notch antenna and an array antenna based on a low profile stripline feed. The notch antenna includes a planar dielectric substrate having upper and lower surfaces. Each surface has a conductive layer with an opening therein. A notch antenna element is disposed on the conductive layer of the upper surface at the opening. A stripline embedded in the planar dielectric substrate extends under the notch antenna element. The stripline is adapted to couple an RF signal between the stripline and the notch antenna element. A conductive via is electrically coupled to the stripline and extends from the stripline to the opening in the conductive layer on the lower surface so that the RF signal is accessible at the lower surface.Type: ApplicationFiled: May 23, 2008Publication date: December 31, 2009Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: Glenn A. Brigham, Marat Davidovitz, Sean M. Duffy, Jeffrey Herd, Zhanna Davidovitz
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Publication number: 20090322637Abstract: In one embodiment, a wide bandwidth, reduced depth transmit/receive antenna array includes unit cells having continuous slots, a transceiver, unbalanced feeds, impedance transformers, and exciters. The continuous slots are formed in a conductive antenna plane, and the transceiver generates and/or receives electrical signals. The unbalanced feeds may be electrically connected between the transceiver and impedance transformers which match the impedance between feed lines and the exciter. They may be located in a plane perpendicular to the direction of propagation of the radiation, and also may be arranged between the conductive antenna plane and a backplane. The exciter spans a continuous slot, and emits and/or receives radiation from the slot. The antenna array is capable of operating without a radome or balun.Type: ApplicationFiled: June 27, 2008Publication date: December 31, 2009Applicant: RAYTHEON COMPANYInventors: Stan W. LIVINGSTON, Jar J. LEE, Dennis NAGATA
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Publication number: 20090322621Abstract: The present disclosure provides techniques for configuring multi-element antenna arrays. Such antenna arrays may be designed with slot pairs separated by ?/2 along perpendicular axes (e.g., x and y-directions). One such array may have four or more co-located antenna element pairs formed with cross slots having the same rotational orientation. Another such array may have four or more co-located antenna element pairs formed with some cross slots having the same rotational orientation and other cross slots having a different rotational orientation.Type: ApplicationFiled: June 30, 2008Publication date: December 31, 2009Applicant: QUALCOMM IncorporatedInventors: Hakan Inanoglu, John W. Ketchum, Leon Metreaud, Mark S. Wallace
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Publication number: 20090322638Abstract: A multiband antenna includes a conductive sheet, a feeding point, and a grounding point. The conductive sheet defines a first slot, a second slot, a third slot, a fourth slot, a fifth slot, a sixth slot, and a seventh slot thereon. The second slot and the third slot extend from a same short side of the first slot and are parallel to each other. The fourth slot, the fifth slot, the sixth slot, and the seventh slot extend perpendicularly from a short side of the third slot away from the first slot in sequence. The feeding point is formed on the conductive sheet at a long side of the first slot away from the third slot. The grounding point is formed on the conductive sheet at a margin of the slots different from the location of the feeding point.Type: ApplicationFiled: September 30, 2008Publication date: December 31, 2009Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Li-Cheng Chiang, Chih-Yuan Yang, Hung-Chang Ko, Po-Wei Kuo, Suo-Bing Su, Wen-Chun Chen
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Patent number: 7639206Abstract: A frequency selective surface-based (FSS-based) device (200) for processing electromagnetic waves providing at least a third-order response. The FSS-based device includes a first FSS (202), a second FSS (210), and a high quality factor (Q) FSS (206) interposed between the first and second FSSs. A first dielectric layer (204) and a second dielectric layer (208) separate the respective FSS layers. The first and second FSSs have first and second primary resonant frequencies, respectively. The high Q FSS has a lower primary resonant frequency relative to the first and second primary resonant frequencies. The overall electrical thickness of the FSS device can be <?/10. The high Q FSS has a loaded quality factor of at least thirty at the lower primary resonant frequency.Type: GrantFiled: May 5, 2008Date of Patent: December 29, 2009Assignee: University of Central Florida Research Foundation, Inc.Inventor: Nader Behdad
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Patent number: 7633458Abstract: Provided is an antenna which has a small-sized planar constitution as can be easily mounted on a small-sized radio device and which can form a principal beam having a vertical polarization in directions of low and high elevation angles. On the surface of a substrate 11, slot elements 13A and 13B having a length of about one half wavelength are arranged in parallel at a predetermined distance d1, and a reflecting plate 14 is arranged at a predetermined distance h from the mounting face of the slot elements 13A and 13B. On the back of the substrate 11, parasitic elements 15A to 15D are made of a copper foil pattern and are arrayed to intersect the slot elements 13A and 13B at right angles. A switching element 16A is connected with the parasitic elements 15A and 15B, and a switching element 16B is connected with the parasitic elements 15C and 15D.Type: GrantFiled: July 21, 2005Date of Patent: December 15, 2009Assignee: Panasonic CorporationInventors: Hiroyuki Uno, Yutaka Saito, Genichiro Ohta, Yoshio Koyanagi
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Publication number: 20090303146Abstract: A slot antenna is located on a substrate and includes a grounding portion, a radiating portion, and a feeding portion. The grounding portion is positioned on the substrate. The radiating portion is symmetrically octagonal-shaped and defines four trapezoidal-shaped slots on opposite sides. The radiating portion is parallel to the grounding portion. The feeding portion electrically connects the radiating portion to the grounding portion for feeding electromagnetic signals to the slot antenna.Type: ApplicationFiled: September 19, 2008Publication date: December 10, 2009Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: Sueng-Chien Wu
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Patent number: 7629936Abstract: There is provided a method for designing a corrugated Fermi antenna having a broad-band and circular directivity required for receiving an image by using a wave of millimeter order. As a first step, an inflection point of the Fermi-Dirac function as a taper function of the Fermi antenna is changed so as to set the beam width of plane H to a beam width having a target directivity. After the beam width of the plane H is set to the target value, the aperture width of the Fermi antenna is changed so as to set the beam width of the plane E to a beam width having a target directivity. Thus, by adjusting the beam width values of the planes H and E independently from each other and matching them with the target values, it is possible to design a Fermi-antenna having a broad-band and circular directivity in a short time.Type: GrantFiled: September 1, 2006Date of Patent: December 8, 2009Inventors: Koji Mizuno, Kunio Sawaya, Hiroyasu Sato, Yoshihiko Wagatsuma
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Patent number: 7626551Abstract: A multi-band planar inverted-F antenna includes a radiating unit, a ground unit and a feeding unit. The radiating unit includes a common radiating element, a high-frequency (HF) radiating element and a low-frequency (LF) radiating element. A quasi U-shaped slot is defined between the HF radiating element and the LF radiating element. The ground unit is electrically connected to one side of the common radiating element. The feeding unit includes a strip electrically connected to one side of the HF radiating element. The ground unit includes a ground point and an inverted-L short-line connected to the ground point at one end thereof. The inverted-L short-line is also electrically connected to the common radiating element at another end thereof. A loop surface current induced by the inverted-L short-line can advantageously enhance bandwidth of the multi-band planar inverted-F antenna at frequencies of interest.Type: GrantFiled: August 9, 2007Date of Patent: December 1, 2009Assignee: Foxconn Communication Technology Corp.Inventors: Chin-Cheng Chien, Chien-Hsien Ho, Chien-Jung Lin, Yu-Sheng Chang
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Patent number: 7619577Abstract: The open-slot antenna contains a rectangular main metallic plate having a similarly shaped slot, first and second auxiliary metallic plates extended perpendicularly from the main metallic plate for about the same distance, and a coaxial cable connecting to the main metallic plate across the slot. The first auxiliary metallic plate is positioned generally along a middle range of a longer section of the main metallic plate while the second auxiliary metallic plate is positioned to a side of the first auxiliary metallic plate with an appropriate spacing therebetween. The length of the first auxiliary metallic plate is larger than that of the second auxiliary metallic plate.Type: GrantFiled: April 24, 2008Date of Patent: November 17, 2009Inventor: Yi-Tsan Cheng
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Publication number: 20090273527Abstract: A frequency selective surface-based (FSS-based) device (200) for processing electromagnetic waves providing at least a third-order response. The FSS-based device includes a first FSS (202), a second FSS (210), and a high quality factor (Q) FSS (206) interposed between the first and second FSSs. A first dielectric layer (204) and a second dielectric layer (208) separate the respective FSS layers. The first and second FSSs have first and second primary resonant frequencies, respectively. The high Q FSS has a lower primary resonant frequency relative to the first and second primary resonant frequencies. The overall electrical thickness of the PSS device can be <?/10. The high Q FSS has a loaded quality factor of at least thirty at the lower primary resonant frequency.Type: ApplicationFiled: May 5, 2008Publication date: November 5, 2009Applicant: University of Central Florida Research Foundation, Inc.Inventor: Nader Behdad
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Publication number: 20090273533Abstract: A high gain, phased array antenna includes a conducting sheet having a number of one or more slots defined therein. For each slot, an electrical microstrip feed line is electronically coupled with a corresponding slot to form a magnetically-coupled LC resonance element. A main feed line couples with the one or more microstrip feed lines. A specific azimuth pattern, antenna frequency, and/or beam direction is/are selectable in accordance with specific structural or electrical characteristics of the antenna.Type: ApplicationFiled: May 5, 2008Publication date: November 5, 2009Applicant: PINYON TECHNOLOGIES, INC.Inventors: Forrest Wolf, Debashis Bagchi
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Patent number: 7612730Abstract: An antenna system and an antenna thereof are provided. The antenna system comprises an antenna array including a plurality of antennas and at least one plate. The at least one plate is used for isolating two neighbor ones of the antennas. Each of the antennas comprises a first surface and a second surface. The first surface has a metal area and a slot area. The metal area is coated by a metal material, while the slot area consists of three slots. Each of the slots comprises a first area and a second area. The first areas are connected to each other, and each of the second areas extends to different directions individually. The second surface is coated by a metal line as a signal feed end. The metal line terminates at an opposite position of a signal feed slot, which is one of the three slots.Type: GrantFiled: March 28, 2008Date of Patent: November 3, 2009Assignee: YFY RFID Technologies Company LimitedInventors: Chan-Ping Lim, Tsung-Ying Tsai
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Patent number: 7612729Abstract: A VHTR TSA For Impedance Matching Method (NC#098835). The method includes providing a first antenna element of a tapered slot antenna pair, providing a second antenna element of the tapered slot antenna pair and operatively coupling the first antenna element and the second antenna element to form the tapered slot antenna pair having a gap height and a TSA thickness having a correlation represented by the following equation: h = w × z 0 × e r 44 × ? ; where h=gap height w=TSA thickness z0=characteristic impedance er=dielectric constant of dielectric spacing material V=a constant having a value greater than or equal to 15 and less than or equal to 100. ?=ratio of a circle's circumference to its diameter.Type: GrantFiled: August 23, 2007Date of Patent: November 3, 2009Assignee: The United States of America as represented by the Secretary of the NavyInventors: Rob Horner, Rod Cozad, Hale Simonds, Robbi Mangra
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Patent number: 7605769Abstract: In a multi-band U-slot planar antenna, a limited ground plane is provided. A connector includes a ground terminal connected to the ground plane and a feeding terminal for feeding a signal. A planar radiation device includes a feeding point connected to the feeding terminal, a central U-slot having a symmetrical configuration about a central axis thereof, the central axis extending vertically from the feeding point, and at least one pair of auxiliary U-slots symmetrical with each other about the central axis. In the multi-band U-slot planar antenna, alternatively, at least one auxiliary U-slot may have a symmetrical configuration about the central axis.Type: GrantFiled: April 16, 2007Date of Patent: October 20, 2009Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Jae Chan Lee, Jong Won Yu, Wang Sang Lee, Hyun Hak Kim
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Patent number: 7598918Abstract: The tubular slot-mode antenna includes an array of slot antenna units carried by a tubular substrate, e.g. a cylindrical substrate, and each slot antenna unit having a pair of patch antenna elements arranged in laterally spaced apart relation about at least one central feed position. Adjacent patch antenna elements of adjacent slot-mode antenna units have respective spaced apart edge portions with predetermined shapes and relative positioning to provide increased capacitive coupling therebetween. The array of slot-mode antenna units may define a plurality of ring-shaped slots coaxial with an axis of the tubular substrate, and a feed arrangement may be coupled thereto to operate the array of slot-mode antenna units in an endfire mode.Type: GrantFiled: January 21, 2008Date of Patent: October 6, 2009Assignee: Harris CorporationInventors: Timothy E. Durham, Griffin K. Gothard, Anthony Mark Jones, Jay Kralovec, Stephen R. Landers, Sean Ortiz, Chris Snyder, Ralph Trosa
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Patent number: 7592963Abstract: A multi-band slot resonating ring antenna (SRRA) is suitable to be manufactured on a circuit board. A first conductive plane includes concentric slots corresponding to different frequency bands. The antenna may be fed by microstrip feed lines. The antenna may also be fed by probes. A conductive layer may include coupling apertures to couple signal energy to the concentric slots.Type: GrantFiled: September 29, 2006Date of Patent: September 22, 2009Assignee: Intel CorporationInventor: Dajun Cheng
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Publication number: 20090231225Abstract: Embodiments of wireless antenna array systems to achieve three-dimensional beam coverage are described herein. Other embodiments may be described and claimed.Type: ApplicationFiled: June 27, 2008Publication date: September 17, 2009Inventors: Debabani Choudhury, Richard D. Roberts, Ulun Karacaoglu
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Publication number: 20090231226Abstract: An exemplary embodiment of a dual band antenna array includes a folded thin circuit board structure with a thin dielectric layer and a conductor layer pattern formed on a first surface of the dielectric layer, the circuit board structure folded in a plurality of folds to form a pleated structure. A first array of radiator structures on the first surface is configured for operation in a first frequency band in a first polarization sense. A second array of radiator structures is configured for operation in a second frequency band in a second polarization sense. A conductor trace pattern is formed on the folded circuit board to carry control signals, DC power and RF signals. Active RF circuit devices are attached to the folded circuit board in signal communication with the conductor trace pattern.Type: ApplicationFiled: March 12, 2009Publication date: September 17, 2009Inventors: Clifton Quan, Fangchou Yang
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Patent number: 7589692Abstract: A planar inverted F antenna having a radiation patch having an asymmetric shape of linearly-tapered rectangle with a plurality of corrugated hollows is disclosed. The planar inverted F antenna having a radiation patch, includes: a first radiation patch for radiating a signal; a ground plate for grounding the first radiation patch; a feeding line for supplying an electric power to the first radiation patch; a short plate having one side coupled to the first radiation patch and other side coupled to the ground plate for shorting the first radiation patch, wherein the first radiation patch having an asymmetrical shape of linearly tapered rectangle and has one or more corrugated hollows.Type: GrantFiled: October 15, 2004Date of Patent: September 15, 2009Assignee: Electronics and Telecommunications Research InstituteInventors: Byung-Chan Kim, Je-Hoon Yun, Hyung-Do Choi
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Patent number: 7583233Abstract: A log-periodic antenna having a layer of dielectric media interposed between a microstrip log-periodic portion and a slot log-periodic portion where an array of two or more log-periodic antennas that may be placed about vehicles, such as air vehicles, or mounted on stationary structures, such as communication towers.Type: GrantFiled: September 26, 2007Date of Patent: September 1, 2009Assignee: Alliant Techsystems Inc.Inventors: Mark Russell Goldberg, Harold Kregg Hunsberger
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Publication number: 20090195469Abstract: An antenna system and an antenna thereof are provided. The antenna system comprises an antenna array including a plurality of antennas and at least one plate. The at least one plate is used for isolating two neighbor ones of the antennas. Each of the antennas comprises a first surface and a second surface. The first surface has a metal area and a slot area. The metal area is coated by a metal material, while the slot area consists of three slots. Each of the slots comprises a first area and a second area. The first areas are connected to each other, and each of the second areas extends to different directions individually. The second surface is coated by a metal line as a signal feed end. The metal line terminates at an opposite position of a signal feed slot, which is one of the three slots.Type: ApplicationFiled: March 28, 2008Publication date: August 6, 2009Inventors: Chan-Ping LIM, Tsung-Ying TSAI
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Patent number: 7570225Abstract: An RFID antenna that can be disposed in a space-saving manner. The RFID antenna comprises an outermost peripheral conductive line that is bent in a manner extending along sides of a generally rectangular shape having a predetermined size, and a power-feeding conductive line that is disposed close to an inner periphery of the outermost peripheral conductive line in a manner extending parallel therewith, and is electrically connected to the outermost peripheral conductive line at ends thereof, the power-feeding conductive line including a portion thereof formed with a feeder part. Therefore, the antenna fits into a rectangle having a predetermined size, such as a card size.Type: GrantFiled: April 26, 2007Date of Patent: August 4, 2009Assignee: Fujitsu LimitedInventors: Manabu Kai, Toru Maniwa, Takashi Yamagajo
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Patent number: 7561046Abstract: A reader antenna is connected to an interrogator. Conductors are arranged at two places at the opposed marginal edge portions of a radiation plane of the reader antenna along a radiation direction of an electromagnetic wave from the reader antenna. The conductors raises the electric power density above the reader antenna. A storage case is set above the reader antenna and has many items arranged at narrow intervals with radio tags attached thereto. The storage container has the radio tags arranged substantially parallel to the polarization direction of the reader antenna. By doing so, adequate drive power is applied to the radio tag by an electromagnetic wave from the reader antenna.Type: GrantFiled: September 7, 2006Date of Patent: July 14, 2009Assignee: Toshiba Tec Kabushiki KaishaInventors: Masakazu Kato, Sadatoshi Oishi
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Patent number: 7557765Abstract: A smart antenna with an adjustable radiation pattern is described. A plurality of slot antennas are formed at a metal layer which is grounded, wherein openings of the slot antennas point to different directions. One surface of an insulated layer is covered by the metal layer. A coaxial feeding structure is provided through the insulated layer. A plurality of microstrip lines are formed at the other surface of the insulated layer and can feed the radio frequency signals to the slot antennas, respectively. Pluralities of switches are connected to each microstrip line and the coaxial feeding structure. A plurality of bias circuits are electrically connected to each switch, respectively, to control the status of the switch and adjust the operation statuses of the slot antennas individually to form an adjustable radiation pattern.Type: GrantFiled: June 7, 2007Date of Patent: July 7, 2009Assignee: Asustek Computer Inc.Inventors: Ming-Iu Lai, Tzung-Yu Wu, Chun-Hsiung Wang, Yung-Chi Fan
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Patent number: 7554491Abstract: This invention provides low profile distributed antenna which comprises a first and second elongated continuous conductors being kept parallel to each other and forming a transmission line, a plurality of perturbation radiators on the first elongated continuous conductor, wherein a substantial amount of radio frequency energy transmitted by the transmission line radiates from the plurality of perturbation radiators, therefore, the transmission line serves as a low profile distributed antenna.Type: GrantFiled: March 23, 2007Date of Patent: June 30, 2009Assignee: Ohio State University Research FoundationInventors: Robert Burkholder, Walter D. Burnside
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Patent number: 7551145Abstract: An antenna (10) having a top (14), a bottom (16), and a longitudinal axis (20). An outer shell (12) of electrically conductive material is provided which is coaxial with the longitudinal axis, and which includes an outer top wall (22) joining with an outer side wall (24) that extends toward the bottom of the antenna. The shell defines an interior region (18) that is filled with a dielectric material, and the shell has at least one slot (30) with opposed slot ends. Each slot extends from one opposed slot end in the side wall, and at least partially across the top wall to an opposed other slot end. A coaxial feed (32) extends from the bottom of the antenna to the top of the antenna, to convey electromagnetic energy to or from the top wall of the antenna.Type: GrantFiled: June 7, 2007Date of Patent: June 23, 2009Assignee: Wide Sky Technology, Inc.Inventor: Behzad Tavassoli Hozouri
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Publication number: 20090153410Abstract: Electronic devices and antennas for electronic devices are provided. The antennas may have ground plane elements with dielectric-filled openings. The dielectric-filled openings may be configured to form one or more rectangular slots. The antennas may be fed using transmission lines having first and second conductors. The first conductor of a given transmission line may be coupled to the ground plane element on one side of the slots. The second conductor of the transmission line may be coupled to a planar conductive element. The planar conductive element may couple to the ground plane element on the other side of the slots. The slots may be separated by a portion of the ground plane element. The planar conductive element may bridge at least one of the slots and may overlap the portion of the ground plane element that separates the slots without electrically contacting that portion of the ground plane element.Type: ApplicationFiled: December 18, 2007Publication date: June 18, 2009Inventors: Bing Chiang, Gregory Allen Springer, Douglas B. Kough, Enrique Ayala, Matthew lan McDonald
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Publication number: 20090153409Abstract: Microslot antennas may be provided for electronic devices such as portable electronic devices. The microslot antennas may have dielectric-filled microslots that are formed in a ground plane element. The ground plane element may be formed from part of a conductive device housing. The microslots may be narrow enough that they are not readily noticeable to the naked eye. The microslots may have lengths that allow the microslot antenna to provide antenna coverage in one or more communications bands. A first group of the microslots may be used to provide coverage in a first communications band and a second group of the microslots may be used to provide coverage in a second communications band.Type: ApplicationFiled: December 18, 2007Publication date: June 18, 2009Inventors: Bing Chiang, Gregory Allen Springer, Douglas B. Kough, Enrique Ayala, Matthew Ian McDonald
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Publication number: 20090153425Abstract: The present invention relates to a multiple-port dual-band antenna system and the associated interface formed by DPDT or SPDT switches, that can be integrated on one and the same multi-layer structure.Type: ApplicationFiled: November 28, 2006Publication date: June 18, 2009Inventors: Jean-Yves Le Naour, Ali Louzir, Philippe Minard, Jean-Luc Robert, Francoise Le Bolzer
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Publication number: 20090153411Abstract: Dual slot antennas are provided for portable electronic devices such as handheld electronic devices. A dual slot antenna may have an open slot that has an open end that is not encircled by conductive material and may have a closed slot in which each end is surrounded by conductor. The closed and open slots may have portions that run parallel to each other. The antenna may be fed using feed terminals that bridge the closed and open slots in the vicinity of the portions of the slots that run parallel to each other. The slots may have portions that are angled with respect to each other. An end portion of one of the slots may be bent and widened for impedance matching and broadened bandwidth. Other portions of the slots may also be angled with respect to their main longitudinal axes.Type: ApplicationFiled: December 18, 2007Publication date: June 18, 2009Inventors: Bing Chiang, Gregory Allen Springer, Douglas B. Kough, Enrique Ayala, Matthew Ian McDonald, Hao Xu
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Patent number: 7548167Abstract: An RF tag to accompany a conductive object is disclosed that includes an antenna and an integrated circuit connected to the antenna. The antenna includes a first radiating element, a second radiating element, a feeding part connected in series between the first and second radiating elements, and an impedance control part connected parallel to the feeding part. The antenna has an effective length shorter than half of a wavelength used in communication.Type: GrantFiled: January 14, 2008Date of Patent: June 16, 2009Assignee: Fujitsu LimitedInventors: Takashi Yamagajo, Toru Maniwa, Manabu Kai
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Publication number: 20090146897Abstract: Recovery of hydrocarbons, such as petroleum products, from a liquid or solid substrate is facilitated by the use of microwave energy to energize and separate molecular bonds between the hydrocarbons and the substrate. A radio frequency (RF) applicator delivers microwave energy to a treatment volume containing an emulsion of a hydrocarbon and a substrate. Delivering the microwave energy to the emulsion facilitates separation of the hydrocarbon and substrate molecules into layers. Hydrocarbons and other products can then be recovered from their respective layers. The treatment volume may be located either above or below ground. The RF applicator may include an antenna body with slots formed substantially parallel to one another in a substantially horizontal orientation. The RF applicator efficiently delivers microwave energy into the treatment volume. Substantially all of the power supplied to the RF applicator is radiated, with very little power reflected internally within the RF applicator.Type: ApplicationFiled: December 29, 2008Publication date: June 11, 2009Inventors: James Michael Halek, Philip Aaron Harris, Richard Thompson, Robert Ferri, Jonathan Squires
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Patent number: 7545335Abstract: The invention is a novel solution to circumvent the fundamental gain bandwidth limitations of an antenna of a given size by using a traveling-wave (TW) antenna and strongly coupling it with the mounting platform to enlarge the effective size of the antenna. A preferred form of this invention comprises a conducting ground surface generally curvilinear and conformal to said platform, a broadband TW surface radiator positioned above and spaced apart from said ground surface, an impedance matching structure between the surface radiator and the conducting ground surface, and a reactive impedance matching network positioned on the periphery of said surface radiator.Type: GrantFiled: March 12, 2008Date of Patent: June 9, 2009Assignee: Wang Electro-Opto CorporationInventor: Johnson J. H. Wang
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Patent number: 7545334Abstract: It is an object of the present invention to provide an antenna capable of reducing a backside gain while keeping the sensitivity of overall antenna to a certain level. Particularly, in the case of an antenna subject to a circularly polarized wave, it is an object of the invention to provide an antenna capable of reducing the sensitivity of a left-handed circularly polarized wave more than ever before as well as keeping the sensitivity of a right-handed circularly polarized wave to a certain level. The antenna of the invention includes a plurality of ground conductors, a radiation conductor provided via a dielectric on a part of the above-mentioned ground conductor. The notch is formed on at least one of the above-mentioned ground conductors. The notch is formed outside of the area opposite to the above-mentioned radiation conductor.Type: GrantFiled: May 11, 2007Date of Patent: June 9, 2009Assignee: Furuno Electric Co., Ltd.Inventor: Ken'ichi Iio
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Patent number: 7541999Abstract: A polarization switching/variable directivity antenna according to the present invention includes a ground conductor plate 12 on a surface of a dielectric substrate 11, and has a radiation element 13, a directivity switching element 15, and polarization switching elements 16 provided on the ground conductor plate 12 side of the dielectric substrate 11. The radiation element 13 includes a first slot 17a formed by removing a loop-like portion from the ground conductor plate 12. The directivity switching element 15 includes a second slot 17b formed by removing a loop-like portion from the ground conductor plate 12 and directivity switching switches 18. The polarization switching elements 16 includes a third slot 17c formed by removing a linear-shaped portion from the ground conductor plate 12 and polarization switching switches 19a to 19d. Through control of the directivity switching switches 18, switching of a maximum gain direction of radiation directivity of the antenna is realized.Type: GrantFiled: March 31, 2008Date of Patent: June 2, 2009Assignee: Panasonic CorporationInventors: Akio Matsushita, Tomoyasu Fujishima
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Patent number: 7542004Abstract: A horizontally polarized, substantially omnidirectional broadband transmitting antenna uses parasitic dipoles to increase azimuthal circularity over frequency. Because the magnitude of nulls in the field strength increases with frequency, the dipoles are preferentially sized for optimum reradiation at the highest frequency expected for the antenna. For maximum reinforcement of signal strength in the nulls, the longitudinal axes of the dipoles in a preferred embodiment lie in the center planes of the multiple bays of the antenna, are perpendicular to the proximal axes of radiation, and are centered on the nulls. The dipoles are suitable for use with several antenna styles, and are expressly compatible with crossed bowtie slot antennas.Type: GrantFiled: May 2, 2006Date of Patent: June 2, 2009Assignee: SPX CorporationInventors: Andre Skalina, John L. Schadler
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Patent number: 7538736Abstract: A variable slot antenna includes: ground conductors 101a and 101b, which are divided by a slot region 109 both of whose both ends are open ends 111a and 111b; a feed line 115 for feeding power to the slot region 109; a first selective conduction path 119 connecting between the ground conductors 101a and 101b in a direction of the open end 111a as viewed from a feeding site 113; and a second selective conduction path 121 connecting between the ground conductors 101a and 101b in a direction of the open end 111b as viewed from the feeding site 113. In a first driving state, the first selective conduction path 119 is allowed to conduct and the second selective conduction path 121 is left open, so that a main beam is emitted in a direction 123a of the second selective conduction path 121 as viewed from the feeding site 113. In another driving state, the selective conduction paths are controlled differently so that the main beam direction is switched to a direction 123b.Type: GrantFiled: July 24, 2008Date of Patent: May 26, 2009Assignee: Panasonic CorporationInventors: Hiroshi Kanno, Tomoyasu Fujishima
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Publication number: 20090128435Abstract: A slot-coupled microstrip antenna includes a first substrate, a second substrate, and a support base. The first substrate having a first surface and a second surface, in which a ground surface that is formed on the first surface, and a plurality of slots are formed on the ground surface. A feeding network is formed on the second surface. A plurality of antenna corresponding to the slots are formed on the second substrate disposed above the first surface. The support base having two fillisters at two side of the support base. The design of slot structure often has adverse influence on cross polarization and a front-to-back ratio of antenna radiation. The support base having two fillisters of the slot-coupled microstrip antenna can effectively inhibit the influence on the cross polarization and raise the front-to-back ratio from the slots.Type: ApplicationFiled: November 16, 2007Publication date: May 21, 2009Applicant: SmartAnt Telecom Co., Ltd.Inventor: Jr-Ren Jeng
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Publication number: 20090121953Abstract: The present invention relates to a transmission/reception antenna with diversity of radiation comprising on a substrate at least a first and a second radiating elements connected by a network of feeder lines to a transmission/reception circuit of electromagnetic signals, wherein the network is constituted by a first feeder line connected to a first radiating element and by a set of two second feeder lines each connected by means of a switching element to the second radiating element in such a manner as to supply the two radiating elements in phase or in phase opposition, the set of the two second feeder lines being connected to the first feeder line by a third feeder line, the first and third feeder lines being connected by a feeder line common to the transmission/reception circuit of electromagnetic signals.Type: ApplicationFiled: October 18, 2006Publication date: May 14, 2009Inventors: Nicolas Boisbouvier, Jean-Francois Pintos, Philippe Minard
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Patent number: 7532172Abstract: With a differential feed line 103c, open-ended slot resonators 601, 603, 605, and 607 are allowed to operate in pair, a slot length of each slot resonator corresponding to a ¼ effective wavelength during operation. Slot resonators which are excited out-of-phase with an equal amplitude are allowed to appear within the circuitry. Thus, positioning condition of the open end points of the selective radiation portions 601b, 601c, 603b, 603c, 605b, and 607b in the respective slot resonators is dynamically switched.Type: GrantFiled: June 26, 2008Date of Patent: May 12, 2009Assignee: Panasonic CorporationInventor: Hiroshi Kanno
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Publication number: 20090109109Abstract: A communication device (110, 210) has an antenna (150, 152, 250, 252) positioned on a multilayer substrate/printed circuit board (154, 254, 254?). A first high frequency material (116, 216) is disposed over a first side of the substrate (154, 254) characterized for low frequency devices. A conductive layer (118, 218) is patterned over the first high frequency material (116, 216), defining first and second circuit traces (122, 124, 222, 224) and first and second antenna traces (132, 134, 232, 234). The first and second antenna traces (132, 134, 232, 234) define a first slot (116, 216) in the first conductive layer (122, 222), which is aligned with a cutout (162, 262) defined by the substrate (154, 254). One of a transmitter (112, 212) and a receiver (114, 214) are disposed over the high frequency material (116, 216) and coupled to the edge emitting antenna (150, 250) by the first and second circuit traces (122, 124, 222, 224).Type: ApplicationFiled: October 25, 2007Publication date: April 30, 2009Applicant: MOTOROLA, INC.Inventors: Steven Franson, Bruce Bosco
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Patent number: 7525499Abstract: Opposite ends open slot resonators (601, 605) having a slot length during an operation set to become one half of effective wavelength are operated by a differential feeder liner (103c) and a slot resonator group excited with a reverse phase/equal amplitude is made to emerge in the circuit, and arrangement conditions of the open end points of selective radiation parts (601b, 601c, 603b, 603c, 605b, 605c, 607b, 607c) in each slot structure are switched dynamically.Type: GrantFiled: June 26, 2008Date of Patent: April 28, 2009Assignee: Panasonic CorporationInventor: Hiroshi Kanno
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Patent number: 7525498Abstract: An antenna array includes a folded thin flexible circuit board with a thin dielectric layer and a conductor layer pattern formed on a first surface of the dielectric layer. The circuit board may be folded in a plurality of folds to form a pleated structure. An array of radiator structures is formed on the first surface, A conductor trace pattern is formed on the folded circuit board. A plurality of active RF circuit devices is attached to the folded circuit board in signal communication with the conductor trace pattern.Type: GrantFiled: October 11, 2006Date of Patent: April 28, 2009Assignee: Raytheon CompanyInventors: Clifton Quan, Mark S. Hauhe
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Publication number: 20090102734Abstract: This invention relates to a radiating element 20 for use in array antennas. The radiating element 20 is of simplified design and comprises a front region 26 and a rearward region 28 that are preferably substantially rectangular, which permit higher frequency limits than more conventional Vivaldi elements while maintaining the lower frequency limit. Additionally, by deployment of an array of a plurality of such elements 20 such that no gaps are formed between adjacent elements 20 along the array antenna, very wide bandwidth can be obtained using the array.Type: ApplicationFiled: November 14, 2006Publication date: April 23, 2009Inventors: Graeme Byrne, Ronald William Lyon, Robert Ian Henderson
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Patent number: 7522114Abstract: A high gain, phased array antenna includes a conducting sheet having a number of one or more slots defined therein. For each slot, an electrical microstrip feed line is electronically coupled with a corresponding slot to form a magnetically-coupled LC resonance element. A main feed line couples with the one or more microstrip feed lines. At least one slot and/or microstrip feed line includes at least one segment with greater width than other segments.Type: GrantFiled: March 30, 2007Date of Patent: April 21, 2009Assignee: Pinyon Technologies, Inc.Inventors: Forrest J. Brown, Forrest Wolf
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Patent number: 7518565Abstract: A Tapered Slot Antenna Cylindrical Array (NC#97194). The apparatus includes a base and a tapered slot antenna array. The base is capable of retaining a plurality of tapered slot antenna pairs. The tapered slot antenna array is operatively coupled to the base in a cylindrical configuration. The tapered slot antenna array comprises at least two tapered slot antenna pairs. Each tapered slot antenna pair of the at least two tapered slot antenna pairs is capable of operating independently of or in conjunction with other tapered slot antenna pairs of the at least two tapered slot antenna pairs to enable direction finding, acquisition, communication and electronic attack capabilities.Type: GrantFiled: June 15, 2006Date of Patent: April 14, 2009Assignee: The United States of America as represented by the Secretary of the NavyInventors: Rob Horner, Rod Cozad, Bruce Calder, Hale Simonds, Robbi Mangra, Rolf Dahle, Dennis Bermeo
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Patent number: 7511674Abstract: A shunt antenna mountable on an aircraft comprises a lower plate, an antenna element formed above the lower plate and integrated within a dorsal fin of the aircraft where the antenna element is substantially slant relative to the lower plate; one or more couplers formed on the lower plate and operatively connected to a lower forward end of the antenna element. The couplers transmit radio frequency signals to the antenna element, and the antenna element and the lower plate are separated by air to produce a capacitor effect.Type: GrantFiled: October 11, 2006Date of Patent: March 31, 2009Assignee: ASB Avionics, LLC.Inventor: Duane K. McNutt