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4916results about "Slot antennas" patented technology
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Aperture matched polyrod antenna
InactiveUS20080252541A1Minimizes and reduces end reflection and phase variationMinimizing and reducing diameterAdditive manufacturing apparatusWaveguide type devicesGaussian beamLight beam
A dielectric polyrod having at least one tapered section, where a section exposed outside of the waveguide is tapered a long a curve that depends on the dielectric constant of the material used. The invention also relates to an aperture matched polyrod antenna which includes the same and an inductive tuning element used to achieve wideband impedance match and to create a Gaussian beam in the radiating near field of the antenna, suitable to mimic a small region plane wave.
Owner:ARIZONA STATE UNIVERSITY
Detection of fluids in tissue
InactiveUS7122012B2Easy to detectLow profileElectrotherapyMaterial analysis using microwave meansMedicineFluid level
A method of detecting a change (that is, an increase or a decrease) in the level of fluid in tissue in a first area of a body includes the steps of: applying electromagnetic energy, preferably in the frequency range of approximately 300 MHz to approximately 30 GHz, to a first volume of the body; measuring a resultant or returned signal; comparing the signal to a reference signal to determine if the fluid level in the tissue has changed. In one embodiment, the method detects changes in the level of fluid in tissue of a body by applying electromagnetic energy to a first volume of the body over a period of time (for example, using an antenna or antennae); measuring a resultant signal or a signal returned from the tissue; and comparing the signal to a reference signal to determine if a level of fluid in the tissue has changed during the period of time.
Owner:BAYER HEALTHCARE LLC
Multi-band planar antenna
InactiveUS6911945B2Easy to manufactureImprove matchSimultaneous aerial operationsAntenna supports/mountingsMulti bandRadio equipment
A multi-band planar antenna applicable as an internal antenna in small-sized mobile stations, and to a radio device including an antenna according to the invention. The basis is a conventional dual band PIFA with its feeding and shorting conductors and a non-conducting slot. The planar element (220) has a second slot (232) known as such, which starts at the edge of the planar element on the other side of the feeding conductor (221) and shorting conductor (211) than the above-mentioned slot (231). In addition the structure comprises a second shorting conductor (212) on the other side of the second slot, than the feeding conductor. The second slot acts as a radiator, which for instance broadens the upper band of a dual band antenna. The second shorting conductor facilitates a better matching of a multi-band antenna than in corresponding prior art antennas. The antenna is simple, and its manufacturing costs are relatively low.
Owner:CANTOR FITZGERALD SECURITIES
Passive transponder identification and credit-card type transponder
InactiveUS20030006901A1Simultaneous aerial operationsDetection of traffic movementCredit cardTag antenna
A passive transponder identification system and credit card type transponder are disclosed, particularly, the transponder identification system to utilize a transmitting manner of two different RF signals is provided. The present invention directly relates to a passive transponder without any kind of power source. Therefore, the present invention has advantages of having a constant gain value by developing a high-gain dual polarizing antenna for a small credit card type passive tranponder to identify at long distance, independently to any direction of the transponder; improving gain values than conventional transponder tag antenna by 6-9 dB to ensure a sub-permanent life time by providing the desired identification performance by means of a small credit card type passive transponder without power supply; and being applicable to any systems to identify and distinguish high-speed moving objects.
Owner:CREDIPASS
Electromagnetic sensors for biological tissue applications and methods for their use
ActiveUS7591792B2Improves signal couplingImproves resulting measurementElectrotherapyAntenna supports/mountingsMeasurement pointEngineering
Tissue sensors house one or more sensor elements. Each element has a housing mounted substrate and a superstrate with a planar antenna between. A transitional periphery (TP) of a superstrate outer surface interconnects a base to a plateau. At least some of the TP has a generally smooth transition. Plural elements are spaced by the housing. Alternately, the superstrate TP is flat, the housing extends to the outer superstrate surface and a shield surrounds the element. The housing is flush with or recessed below the superstrate and defines a TP between the housing and superstrate. A method converts a reference signal to complex form; plots it in a complex plane as a reference point (RP); converts a measurement signal to complex form; plots it in the complex plane as a measurement point (MP); determine a complex distance between the MP and the RP; and compares complex distance to a threshold.
Owner:BAYER HEALTHCARE LLC
Wideband circularly polarized hybrid dielectric resonator antenna
ActiveUS8928544B2High bandwidthCompact geometryAntenna supports/mountingsAntennas earthing switches associationDielectric resonator antennaPhase difference
The present invention provides a dielectric resonator antenna comprising: a dielectric resonator; a ground plane, operatively coupled with the dielectric resonator, the ground plane having four slots; and a substrate, operatively coupled to the ground plane, having a feeding network consisting of four microstrip lines; wherein the four slots are constructed and geometrically arranged to ensure proper circular polarization and coupling to the dielectric resonator; and wherein the antenna feeding network combines the four microstrip lines with a 90 degree phase difference to generate circular polarization over a wide frequency band.
Owner:HER MAJESTY THE QUEEN AS REPRESENTED BY THE MINIST OF NAT DEFENCE OF HER MAJESTYS CANADIAN GOVERNMENT
Multi-band antenna with wide bandwidth
InactiveUS7333067B2Wide bandwidthCompact configurationSimultaneous aerial operationsAntenna supports/mountingsMulti bandImpedance matching
Owner:HON HAI PRECISION IND CO LTD
Multi-band horn antenna using frequency selective surfaces
InactiveUS6985118B2Grating lobe of the antenna is reducedImprove permeabilityWaveguide hornsSimultaneous aerial operationsMulti bandHorn antenna
A waveguide (100) including at least one outer surface (105, 110, 115, 120) defining a waveguide cavity (140) and at least one inner surface (130, 135) positioned within the waveguide cavity (140). The inner surface (130, 135) includes a frequency selective surface (FSS) having a plurality of FSS elements (145) coupled to at least one substrate. The substrate defines a first propagation medium such that an RF signal having a first wavelength in the first propagation medium can pass through the FSS (130, 135). The FSS (130, 135) is coupled to a second propagation medium such that in the second propagation medium the RF signal has a second wavelength which is at least twice as long as a physical distance between centers of adjacent FSS elements (145). The second wavelength can be different than the first wavelength.
Owner:NORTH SOUTH HLDG
Small ultra wideband antenna having unidirectional radiation pattern
ActiveUS7589686B2Enhancing the electromagnetic waves radiatingAntenna arraysElectrically short antennasUltra-widebandAntenna design
A small ultra wideband (UWB) antenna designed to have a unidirectional radiation pattern is disclosed. The UWB antenna includes a substrate; a power feeding part, provided on an upper surface of the substrate, for receiving a supply of an external electromagnetic energy; a dipole radiator excited by the electromagnetic energy fed through the power feeding part and radiating electromagnetic waves in one and the other directions of the substrate; and an active loop radiator excited by the electromagnetic energy fed through the power feeding part, respectively enhancing and canceling the electromagnetic fields produced in one or the other directions of the substrate by the dipole radiator.
Owner:SAMSUNG ELECTRONICS CO LTD
Planar antenna with supplemental antenna current configuration arranged between dominant current paths
InactiveUS7019704B2Simultaneous aerial operationsRadiating elements structural formsCircular segmentElectric current
An antenna arrangement is described in which a pair of at least generally planar opposing antenna arms each support a first high frequency antenna current responsive to an input. Each arm includes a peripheral outline for confining the first high frequency current to a pair of first and second dominant paths, that are defined by the peripheral outline, in a spaced apart relationship across each of the opposing antenna arms so as to define an isolated area between the first and second paths. A configuration is located in this area of at least one of the antenna arms for producing an additional high frequency current responsive to the input. The additional high frequency current cooperates with the first high frequency antenna current to produce an overall antenna response. In one feature, the opposing antenna arms are bow arms which cooperate to define an overall bow-tie configuration as the peripheral outline.
Owner:UNIV OF COLORADO THE REGENTS OF
FSS feeding network for a multi-band compact horn
A feed structure (105) for a horn antenna (100). The feed structure can include a first waveguide (110) and a second waveguide (115) having a first portion at least partially disposed within the first waveguide. The second waveguide also can include a second portion intersecting a first wall (240) of the first waveguide. The first wall can include a first frequency selective surface (244) at an intersection (280) of the first wall and the second portion of the second waveguide. The first waveguide can be operatively coupled to a first horn section (130) and the second portion can be operatively coupled to a second horn section (135).
Owner:NORTH SOUTH HLDG
MMW electronically scanned antenna
A millimeter wave (MMW) antenna array includes a continuous transverse stub (CTS) radiating aperture comprising a set of spaced continuous transverse stubs, each having a longitudinal extent. A series feed system is coupled to an excitation source for exciting the stubs with MMW electromagnetic energy having a linear phase progression along the longitudinal extent of the stubs to produce an array beam which can be scanned over a beam scan range by changing the excitation frequency.
Owner:RAYTHEON CO +1
Aperture matched polyrod antenna
InactiveUS7889149B2Minimizes and reduces end reflection and phase variationMinimizing and reducing diameterAdditive manufacturing apparatusCoupling devicesGaussian beamLight beam
A dielectric polyrod having at least one tapered section, where a section exposed outside of the waveguide is tapered a long a curve that depends on the dielectric constant of the material used. The invention also relates to an aperture matched polyrod antenna which includes the same and an inductive tuning element used to achieve wideband impedance match and to create a Gaussian beam in the radiating near field of the antenna, suitable to mimic a small region plane wave.
Owner:ARIZONA STATE UNIVERSITY
Antenna for radio frequency identification
InactiveUS20050134460A1Integrated and compact antennaSmall sizeSimultaneous aerial operationsAntenna supports/mountingsMillimeterPhysics
To provide an antenna shape devised to be integrated and compact. The antenna connected to an IC chip that performs wireless identification includes a slit that separates two connection points with respect to the IC chip, in which a length of the slit is approximately 3 millimeters, and a width of the slit is in a range of from 0.8 millimeter to 1.4 millimeters.
Owner:HITACHI LTD
Planar Inverted-F-Antenna (PIFA) having a slotted radiating element providing global cellular and GPS-bluetooth frequency response
InactiveUS6741214B1Simultaneous aerial operationsAntenna supports/mountingsPlanar inverted f antennaResonance
Owner:LAIRDTECH INC
Handheld device with two antennas, and method of enhancing the isolation between the antennas
ActiveUS20090262028A1Avoid less flexibilityDistance minimizationSimultaneous aerial operationsAntenna supports/mountingsHand held devicesSlot antenna
The invention relates to a handheld device comprising a first antenna (401, 701, 901, 931, 961, 1101, 1151, 1301, 1501) arranged to operate in at least a first frequency band, and a second antenna (402, 702, 902, 1102, 1302, 1502, 2210) arranged to operate in at least a second frequency band, wherein said second frequency band is different from said first frequency band. According to the invention, the second antenna comprises a slot antenna comprising at least one slot in at least one conductive layer. The invention also relates to enhancement of the isolation between first and second antennas in a handheld device.
Owner:FRACTUS
Dipole antenna of RF chip
ActiveCN101740862AReduce the impactImproving Impedance MatchingRadiating elements structural formsSlot antennasImpedance matchingDipole antenna
Owner:KUANG CHI INST OF ADVANCED TECH
Dual-Polarized Microstrip Antenna
InactiveUS20130044035A1Excellent polarization isolationReduce areaAntenna arraysSimultaneous aerial operationsAntenna designDielectric layer
A dual-polarized microstrip antenna includes: at least one metal radiating patch, i.e. a first metal radiating patch; at least one ground metal layer whereon excitation micro-slots are etched; at least one dielectric layer, i.e. a first dielectric layer it is preferred that the dielectric layer is a resonant dielectric layer such as a resonant dielectric layer of air or other layers of optimization resonant materials; at least one set of bipolar excitation microstrip lines; the dielectric layer is between the first metal radiating patch and the ground metal layer. The dual-polarized microstrip antenna of multi-layer radiation structure is designed in a relatively small volume, which effectively saves the cost of antenna installation and maintenance, and is widely applied in the fields of mobile communication and internet technology.
Owner:ZHUANG KUNJIE
Multiband composite right and left handed (CRLH) slot antenna
This application relates to slot antenna devices based on Composite Right and Left Handed (CRLH) metamaterial (MTM) structures.
Owner:TYCO ELECTRONICS SERVICES GMBH
RFID tag with enhanced readability
ActiveUS20050093678A1Improve performanceSimultaneous aerial operationsAntenna supports/mountingsConductive materialsLength wave
A radio frequency identification (RFID) system includes an RFID device, and a conductive material that cooperates with the RFID device to enhance performance of the RFID device. The RFID device and the conductive material may be within a distance of about one-quarter of a wavelength of energy most preferentially received by the RFID device. The RFID device may be mounted at an angle to the conductive material. Alternatively, or in addition, the RFID device may be partially overlapped by the conductive material. The RFID device may include a conductive antenna structure having an aperture therein.
Owner:AVERY DENNISON CORP
Radio frequency identification tag and radio frequency identification tag antenna
InactiveUS8098201B2Efficiently receiving electromagnetic wave transmittedMaximize readable rangeResonant long antennasSimultaneous aerial operationsTag antennaRadio frequency
An RFID tag includes an antenna and a chip, and the antenna includes a first polygonal dielectric material, first and second microstrip lines partially formed in the first dielectric material, a second polygonal dielectric material stacked on the first dielectric material, and a third microstrip line partially formed in the second dielectric material. According to the present invention, the RFID tag can efficiently receive electromagnetic waves to thereby maximize a readable range.
Owner:ELECTRONICS & TELECOMM RES INST +1
Microstrip antenna
InactiveUS7994999B2FlexibilityImproving Impedance MatchingAntenna arraysSimultaneous aerial operationsDual frequencyCapacitance
A microstrip antenna that can be linear, co-circular, or dual-circularly polarized having co-planar radiating elements and operating at dual frequency bands wherein an inner radiating element is surrounded by and spaced from an outer radiating element. Each radiating element resonates at a different frequency. In one embodiment of the invention a feed network has a single, cross-shaped, feed line that is positioned between the inner and outer radiating elements and capacitively coupled to the inner and outer radiating elements. In another embodiment of the present invention, the radiating elements are fed separately by first and second feed networks each having a plurality of feed points. The radiating elements each have one active feed point that is either directly or indirectly coupled to its respective feed network.
Owner:HARADA IND OF AMERICA
Antenna device
InactiveUS7057558B2Reduce spacingLow costAntenna arraysSimultaneous aerial operationsElectrical conductorDiagonal
A small antenna has two or more feeding ports. A radiator is made of a planar conductor having a substantially circular shape having the diameter of a substantially half wavelength or a substantially regularly polygonal shape where the length of a diagonal line passes through the center point is the substantially half wavelength. A ground plate is faced to the radiator. On the radiator, the feeding ports are connected to feeding points on two orthogonal line segments passing through the center of the radiator. This antenna is used as not only a single antenna but also two independent antennas having secured isolation between the feeding ports. A small antenna device used as two independent antennas is thus provided. The radiator is formed in a hat shape having an edge, has an Stepped Impedance Resonator (SIR) structure where the diameter of a crest part is a quarter wavelength, and is shortened.
Owner:PANASONIC CORP
IC tag and IC tag attachment structure
InactiveUS20060145872A1Wide directivityImpedance matchingSemiconductor/solid-state device detailsSolid-state devicesSurface mountingMetal
A first metal plate for transmission and a second metal plate for transmission are closely-attached to a first surface and a second surface of a dielectric body, respectively. An outer edge of the first metal plate substantially symmetrically faces an outer edge of the second metal plate via the dielectric body. A metal plate for matching is arranged inside a hole formed on the second metal plate, with a slit formed with an inner wall of the hole, and is fixed to the dielectric body. The metal plate for matching is electrically connected to the first metal plate via a through hole penetrating the dielectric body. An IC chip is surface-mounted to connect the second metal plate with the metal plate for matching.
Owner:DENSO CORP
Dual feel multi-band planar antenna
InactiveUS6670923B1Reduce Design ComplexityCompromise performanceSimultaneous aerial operationsAntenna supports/mountingsMulti bandPlanar inverted f antenna
A three-band, two-antenna, assembly includes a planar inverted-F antenna (PIFA) having a radiating / receiving element that is spaced from and extends generally parallel to a ground plane element. The planar radiating / receiving element of an inverted-F antenna (IFA) is located in an open space that exists between the radiating / receiving element of the PIFA and the ground plane element. The radiating / receiving element of the IFA extends either perpendicular to, or parallel to, the radiating / receiving element of the PIFA. The radiating / receiving element of the PIFA includes one or more open slot configurations that operate to provide dual resonant frequencies for the IPFA (AMPS / PCS or GSM / DCS). The radiating / receiving element of the IFA operates in a non-cellular frequency band (ISM or GPS).
Owner:LAIRD CONNECTIVITY LLC
RFID tag with enhanced readability
ActiveUS20050093677A1Improve performanceSimultaneous aerial operationsAntenna supports/mountingsEngineeringConductive materials
A radio frequency identification (RFID) device includes a conductive antenna structure having an elongated slot therein. Parts of the antenna structure on both sides of one end of the elongated slot are coupled to a wireless communication device, such as an RFID chip or interposer. On the opposite end of the elongated slot, parts of the antenna structure at both sides of the elongated slot are electrically coupled together, for instance by being coupled together by other conductive parts of the antenna structure. All of the parts of the antenna structure may be parts of a continuous unitary layer of conductive material. The antenna structure with the elongated slot therein may facilitate increased readability of the RFID device, particularly in directions out from the edges of the RFID device.
Owner:AVERY DENNISON CORP
Wideband antenna array
InactiveUS7109939B2Increased frequency rangeEfficient connectionParticular array feeding systemsAntenna arrays manufactureEngineeringWide band
An antenna array comprises a substrate; a plurality of projecting, tapering structures disposed in an array and attached to a first major surface of said substrate, the plurality of projecting, tapering structures defining a plurality of waveguides therebetween; and a plurality of box-shaped structures disposed in an array and attached to a second major surface of the substrate, the plurality of box-shaped structures defining a plurality of waveguides therebetween, the plurality of waveguides defined by the plurality of projecting, tapering structures aligning with the plurality of waveguides defined by the plurality of box-shaped structures. The substrate includes a plurality of probes for feeding the plurality waveguides.
Owner:HRL LAB
Integrated circuit package including miniature antenna
InactiveUS7095372B2Minimize coiling effectEfficient integrationResonant long antennasSimultaneous aerial operationsSemiconductor chipEngineering
The present invention relates to an integrated circuit package comprising at least one substrate, each substrate including at least one layer, at least one semiconductor die, at least one terminal, and an antenna located in the integrated circuit package, but not on said at least one semiconductor die. The conducting pattern comprises a curve having at least five sections or segments, at least three of the sections or segments being shorter than one-tenth of the longest free-space operating wavelength of the antenna, each of the five sections or segments forming a pair of angles with each adjacent segment or section, wherein the smaller angle of each of the four pairs of angles between sections or segments is less than 180° (i.e., no pair of sections or segments define a longer straight segment), wherein at least two of the angles are less than 115°, wherein at least two of the angles are not equal, and wherein the curve fits inside a rectangular area the longest edge of which is shorter than one-fifth of the longest free-space operating wavelength of the antenna.
Owner:FRACTUS
Antenna using exterior metal frame and electronic device utilizing the same
ActiveUS20160064820A1Improve Radiation PerformanceSimultaneous aerial operationsAntenna supports/mountingsEngineeringPrinted circuit board
An antenna device that uses an exterior metal frame is provided. The antenna includes a Printed Circuit Board (PCB); a plurality of segment-type exterior metal frames spaced apart from the PCB; a feeding portion connected to one metal frame of the plurality of segment-type exterior metal frames; and a slit located between the PCB and the one metal frame, wherein the one metal frame fed through the feeding portion operates with radiation, or the slit operates with radiator, or another exterior metal frame fed through the feeding portion operates with radiation.
Owner:SAMSUNG ELECTRONICS CO LTD
Wave-Guide-Notch Antenna
A dual polarised wave-guide notch antenna array is disclosed. The device comprises a feed section (1) having at least two input transmission lines, a feed / wave-guide interface (5) providing an aperture for transferring a radio frequency electromagnetic wave between the feed section (1) and a wave-guide mode in a wave-guide section (3) having ridges. The wave-guide section transfers energy between the feed / wave-guide interface and a tapered notch section (7), thereby gradually adjusting a created electromagnetic field towards free space conditions.
Owner:TELEFON AB LM ERICSSON (PUBL)
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