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1836 results about "Dipole antenna" patented technology
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In radio and telecommunications a dipole antenna or doublet is the simplest and most widely used class of antenna. The dipole is any one of a class of antennas producing a radiation pattern approximating that of an elementary electric dipole with a radiating structure supporting a line current so energized that the current has only one node at each end. A dipole antenna commonly consists of two identical conductive elements such as metal wires or rods. The driving current from the transmitter is applied, or for receiving antennas the output signal to the receiver is taken, between the two halves of the antenna. Each side of the feedline to the transmitter or receiver is connected to one of the conductors. This contrasts with a monopole antenna, which consists of a single rod or conductor with one side of the feedline connected to it, and the other side connected to some type of ground. A common example of a dipole is the "rabbit ears" television antenna found on broadcast television sets.
Implantable medical device package antenna
InactiveUS20060020300A1Improve efficiencyImprove reliabilityElectrotherapySurgical furnitureTelecommunications linkCommunications system
A wireless communication system is provided that includes an antenna structure adapted for coupling to a medical device antenna when the medical device is not implanted in a patient's body. The antenna structure effectively extends the medical device antenna length, thereby improving the efficiency and reliability of a communication link between the medical device and a programmer or monitor outside the implanted environment. The antenna structure is fabricated from any conductive material, which may be in the form of conductive wire, tape, ink, foil, film, adhesive or the like, and is attached to a portion of a medical device packaging assembly or another accessory device or substrate such as a pouch or overlay. The antenna structure may be a monopole, dipole, slot antenna, microstrip patch, or loop antenna, and may be fixed or movable relative to the substrate on which it is implemented.
Owner:MEDTRONIC INC
High-strength microwave antenna assemblies
InactiveUS6878147B2Avoid mechanical failureSurgical needlesSurgical instruments for heatingAntenna designElectrical conductor
Various high-strength microwave antenna assemblies are described herein. The microwave antenna has a radiating portion connected by a feedline to a power generating source, e.g., a generator. The antenna is a dipole antenna with the distal end of the radiating portion being tapered and terminating at a tip to allow for direct insertion into tissue. Antenna rigidity comes from placing distal and proximal radiating portions in a pre-stressed state, assembling them via threaded or overlapping joints, or fixedly attaching an inner conductor to the distal portion. The inner conductor is affixed to the distal portion by, e.g., welding, brazing, soldering, or by adhesives. A junction member made from a hard dielectric material, e.g., ceramic, can be placed between the two portions and can have uniform or non-uniform shapes to accommodate varying antenna designs. Electrical chokes may also be used to contain returning currents to the distal end of the antenna.
Owner:COVIDIEN LP
Dipole tag antenna structure mountable on metallic objects using artificial magnetic conductor for wireless identification and wireless identification system using the dipole tag antenna structure
InactiveUS20100007569A1Easy to manufactureEasy to installAntenna feed intermediatesRecord carriers used with machinesTag antennaElectrical conductor
Provided are a dipole tag antenna using an artificial magnetic conductor (AMC) for wireless identification and a wireless identification system using the dipole tag antenna. The dipole tag antenna includes: a substrate formed of a first dielectric material; a conductive ground layer formed underneath the substrate; an AMC layer formed on the substrate; the dipole tag antenna mounted on the AMC layer and comprising a wireless identification chip; and the AMC directly mounted on a conductor.
Owner:ELECTRONICS & TELECOMM RES INST
Forward throw antenna utility meter
InactiveUS20080129536A1Impedance matchingElectric signal transmission systemsElectrical measurementsTransceiverEngineering
Systems and methods are provided for a utility meter assembly comprising: a plurality of meter components configured for measuring and collecting data, wherein the meter components include a transceiver operative for signal communications over a network; a faceplate, configured such that meter reading information is displayed on the front of the faceplate; an exterior cover configured to enclose the meter components and the faceplate, wherein the faceplate is forward of the plurality of meter components; and an internal dipole antenna situated within the exterior cover, wherein the internal dipole antenna is beyond the front of the faceplate and toward the front of the utility meter assembly. The internal dipole antenna is typically situated away from the meter components, so as to minimize interference by the meter components. The internal dipole antenna is typically tuned for optimal matching impedance in an 850 MHz or 1900 MHz receiving band, so that the desired receiving band Standing Wave Ration (SWR) is achieved, and also a specified minimum radiated power threshold is maintained.
Owner:ITRON +1
Dipole antenna of RF chip
ActiveCN101740862AReduce the impactImproving Impedance MatchingRadiating elements structural formsSlot antennasImpedance matchingDipole antenna
Owner:KUANG CHI INST OF ADVANCED TECH
Choked Dielectric Loaded Tip Dipole Microwave Antenna
ActiveUS20090187180A1Surgical instruments for heatingSurgical instruments using microwavesDielectricMicrowave
A microwave antenna assembly is disclosed. The antenna assembly includes a feedline having an inner conductor, an outer conductor and an inner insulator disposed therebetween. A radiating portion is also included having an unbalanced dipole antenna including a proximal portion and a distal portion that are of different lengths. The proximal portion includes at least a portion of the inner conductor and the inner insulator and the distal portion includes a conductive member.
Owner:TYCO HEALTHCARE GRP LP
IC-tag-bearing wiring board and method of fabricating the same
InactiveUS20060001138A1Improve efficiencyEasy to useAntenna supports/mountingsSemiconductor/solid-state device detailsEngineeringDipole antenna
To improve electronic part packaging efficiency without sacrificing the transmission distance of a radio IC tag, a recess is formed in the front side surface of a printed wiring board. An IC chip is placed in the recess so that the IC chip does not protrude from the front side surface, a first major surface 1a and a second major surface of the printed wiring board. Antenna elements of an antenna are formed on the front side surface on the opposite sides, respectively, of the IC chip, and the antenna is connected to the IC chip. The antenna is a dipole antenna of a length equal to half the wavelength of radio waves to be radiated by the antenna.
Owner:HITACHI LTD
Narrow gauge high strength choked wet tip microwave ablation antenna
ActiveUS8292881B2Improve performanceIncrease powerSurgical needlesSurgical instruments for heatingCooling chamberDipole antenna
An electromagnetic surgical ablation probe having a coaxial feedline and cooling chamber is disclosed. The disclosed probe includes a dipole antenna arrangement having a radiating section, a distal tip coupled to a distal end of the radiating section, and a ring-like balun short) or choke, which may control a radiation pattern of the probe. A conductive tube disposed coaxially around the balun short includes at least one fluid conduit which provides coolant, such as dionized water, to a cooling chamber defined within the probe. A radiofrequency transparent catheter forms an outer surface of the probe and may include a lubricious coating.
Owner:TYCO HEALTHCARE GRP LP
Ultra-wideband magnetic antenna
InactiveUS6091374AShort antennas for non-sinusoidal wavesAntenna adaptation in movable bodiesUltra-widebandElectrical conductor
An ultra-wideband magnetic antenna includes a planar conductor having a first and a second slot about an axis. The slots are substantially leaf-shaped having a varying width along the axis. The slots are interconnected along the axis. A cross polarized antenna system is comprised of an ultra-wideband magnetic antenna and an ultra-wideband dipole antenna. The magnetic antenna and the dipole antenna are positioned substantially close to each other and they create a cross polarized field pattern. The present invention provides isolation between a transmitter and a receiver in an ultra-wideband system. Additionally, the present invention allows isolation among radiating elements in an array antenna system.
Owner:TIME DOMAIN
Ultra-wideband magnetic antenna
InactiveUS6400329B1Short antennas for non-sinusoidal wavesAntenna adaptation in movable bodiesUltra-widebandElectrical conductor
An ultra-wideband magnetic antenna includes a planar conductor having a first and a second slot about an axis. The slots are substantially leaf-shaped having a varying width along the axis. The slots are interconnected along the axis. A cross polarized antenna system is comprised of an ultra-wideband magnetic antenna and an ultra-wideband dipole antenna. The magnetic antenna and the dipole antenna are positioned substantially close to each other and they create a cross polarized field pattern. The present invention provides isolation between a transmitter and a receiver in an ultra-wideband system. Additionally, the present invention allows isolation among radiating elements in an array antenna system.
Owner:TIME DOMAIN
Low profile dual frequency dipole antenna structure
ActiveUS6961028B2Simultaneous aerial operationsRadiating elements structural formsDual frequencyDipole antenna
An antenna includes a first dipole having first and second stripline radiating elements extending in opposite directions from a central feed point and along a generally rectangular outline of the antenna. The first dipole is operable to be resonant at a first frequency. The antenna also includes a second dipole having third and fourth stripline radiating elements extending in opposite directions from the central feed point and generally parallel to the first and second stripline radiating elements. The third and fourth stripline radiating elements generally follow and stay within the rectangular antenna outline. The second dipole is operable to be resonant at a second frequency. The antenna also includes a stripline balun electrically coupled to the central feed point and extending generally parallel with the first and second dipoles and along the rectangular antenna outline.
Owner:LOCKHEED MARTIN CORP
Effectively balanced dipole microstrip antenna
InactiveUS6987483B2Simultaneous aerial operationsRadiating elements structural formsDipole antennaStripline
A effectively balanced dipole antenna is provided comprising an unbalanced microstrip antenna having a transmission line interface and a planar balun connected to the transmission line interface of the antenna. The balun can be coplanar or multi-planar. For example, a coplanar balun includes an unbalanced coplanar transmission line, with a signal line interposed between a pair of coplanar grounds, and a pair of planar stubs plan-wise adjacent the coplanar grounds. The coplanar grounds are connected to the plane stubs with conductive lines proximate to the antenna transmission line interface. A microstrip planar balun includes an unbalanced microstrip signal line, a microstrip ground formed on the dielectric layer underlying the signal line, and a pair of planar stubs, plan-wise adjacent the microstrip ground. The planar stubs can be located on the same dielectric layer as the signal line or the ground. A stripline planar balun is also provided.
Owner:DRNC HLDG INC
Printed dipole antenna
InactiveUS7034770B2Simultaneous aerial operationsRadiating elements structural formsDipole antennaAtomic physics
Owner:AVAGO TECH WIRELESS IP SINGAPORE PTE
Multiband antenna
ActiveUS20100309067A1Simultaneous aerial operationsRadiating elements structural formsClosed loopEngineering
A multiband antenna includes a first radio unit closed loop and a second radio unit connected to the first radio unit and symmetrical structure. When the multiband antenna functions, the first radio unit functions as a balanced loop antenna, and the second radio unit functions as a dipole antenna.
Owner:CHI MEI COMM SYST INC
High-strength microwave antenna assemblies and methods of use
InactiveUS7128739B2Avoid mechanical failureHigh energy concentrationSurgical needlesMicrowave therapyMicrowaveHigh intensity
High-strength microwave antenna assemblies and methods of use are described herein. The microwave antenna has a radiating portion connected by a feedline to a power generating source, e.g., a generator. The antenna is a dipole antenna with the distal end of the radiating portion being tapered and terminating at a tip to allow for direct insertion into tissue. The antenna can be used individually or in combination with multiple antennas to create a combined ablation field. When multiple antennas are used, microwave energy can be applied simultaneously to all the antennas or sequentially between the antennas. Furthermore, to facilitate positioning the antennas in or near the tissue to be treated, RF energy may be applied at the tip of the antenna to assist in cutting through the tissue.
Owner:TYCO HEALTHCARE GRP LP
Stimulating production from oil wells using an RF dipole antenna
ActiveUS20140152312A1Reduced effectivenessLow thermal conductivityFluid removalDetection using electromagnetic wavesRf fieldElectrical conductor
A system emplaced in a subsurface formation configured to produce radio frequency (RF) fields for recovery of thermally responsive constituents includes coaxially disposed inner and outer conductors connected at an earth surface to an RF power source. The inner and outer conductors form a coaxial transmission line proximate said earth surface and a dipole antenna proximate said formation. The inner conductor protrudes from the outer conductor from a junction exposing a gap between the conductors to a deeper position within the formation. The RF power source is configured to deliver, via the conductors, RF fields to the formation. The system also includes at least one choke structure attached to said outer conductor at a distance at least ¼ wavelength above said junction. The choke structure is configured to confine a majority of said RF fields in a volume of said formation situated adjacent to said antenna.
Owner:PYROPHASE INC
System and method for multi-path simulation
InactiveUS20050059355A1Reduced strengthReliable resultsTransmission monitoringMobile antennasDirect path
The present invention provides a system and method for multi-path simulation that employs a shielded anechoic chamber to avoid external electromagnetic interference and other uncontrollable transmission paths during testing, and simulates a main indirect transmission path by a reflector within the chamber. An attenuating device is used to attenuate signals, thereby simulating the signal attenuation during transmission. The shielded anechoic chamber also includes a movable platform and a turntable, both controlled by a control unit, for carrying a dipole antenna and a wireless communication device to be tested respectively. The movable platform is used to shift the antenna, thereby simulating the phase shift between a direct path and a main indirect path of the system; the turntable is used to change the reception azimuth of the communication device, thereby measuring the performance of the device in various azimuth angles.
Owner:ACCTON TECHNOLOGY CORPORATION
Slidable Choke Microwave Antenna
ActiveUS20090295674A1Radiating element housingsSurgical instruments for heatingMicrowaveElectrical conductor
A microwave antenna assembly is disclosed. The antenna assembly includes a feedline having an inner conductor, an outer conductor and an inner insulator disposed therebetween and a radiating portion including a dipole antenna coupled to the feedline and a trocar coupled to the dipole antenna at a distal end thereof. The antenna assembly also includes a slidable outer jacket disposed about the radiating portion and the feedline. The slidable outer jacket being configured to slide about at least one of the radiating portion and the feedline from a closed configuration, in which the slidable outer jacket is mated with the trocar and a retracted configuration, in which the slidable outer jacket is retracted in a proximally exposing at least a portion the radiating portion.
Owner:TYCO HEALTHCARE GRP LP
Multi-band printed dipole antenna
InactiveUS20050035919A1Simultaneous aerial operationsAntennas with plural divergent straight elementsMulti bandImpedance matching
A multi-band printed dipole antenna (1) for an electronic device includes an elongate insulative substrate (2), a first, second and third pairs of dipole elements (31a, 31b, 32a, 32b, 33a, 33b) closely and parallelly disposed on the substrate, a capacitor (5) and a feeder cable (4). The first, second and third pair of dipole elements respectively couple with the feeder cable to form a first, second and third dipole antennas. The capacitor is used to improve the impedance matching of the second dipole antenna.
Owner:HON HAI PRECISION IND CO LTD
Coaxial inductor and dipole EH antenna
An antenna for generating radiation includes a primary E-field generating circuit and a secondary E-field generating circuit. The primary E-field generating circuit generates a primary E-field in response to a source RF signal being applied to the antenna. The secondary E-field generating circuit generates a secondary E-Field, disposed apart from the primary E-field, in response to the source RF signal and develops an H-field that is in time phase with the primary E-field. This causes the antenna to develop a radiation resistance as an indication of radiation.
Owner:ALPHA COGNETICS
Cooled Dielectrically Buffered Microwave Dipole Antenna
ActiveUS20100234839A1Improved strength and stiffnessReduce adverse effectsSurgical instruments for heatingSurgical instruments using microwavesMicrowaveElectrical conductor
Microwave antenna assemblies incorporating a resilient insulating coupler are described herein. The microwave antenna includes a radiating portion connected by a coaxial feedline to a power generating source, e.g., a generator. Distal and proximal radiating portions of the antenna, which correspond to inner and outer conductors provided by the coaxial feedline, are separated by the resilient insulating coupler. The described coupler includes a proximal threaded portion, and an overmolded insulating portion formed from an elastomeric material. The inner conductor of the coaxial feedline is joined to the threaded portion of the coupler, and is placed under tension to draw together the distal radiating portion, the coupler, and the proximal radiating portion into a single rigid assembly. In use, the resilient coupler provides increased strength and reliability by absorbing mechanical stresses typically encountered during microwave ablation procedures.
Owner:TYCO HEALTHCARE GRP LP
Security tag with three dimensional antenna array made from flat stock
InactiveUS20050040994A1Antenna supports/mountingsRadiating elements structural formsDipole antennaComputer science
A three-dimensional dipole antenna system for an RFID tag that optimizes detection for a given available volume in which to situate the RFID tag.
Owner:CHECKPOINT SYST INC
Slidable choke microwave antenna
A microwave antenna assembly is disclosed. The antenna assembly includes a feedline having an inner conductor, an outer conductor and an inner insulator disposed therebetween and a radiating portion including a dipole antenna coupled to the feedline and a trocar coupled to the dipole antenna at a distal end thereof. The antenna assembly also includes a slidable outer jacket disposed about the radiating portion and the feedline. The slidable outer jacket being configured to slide about at least one of the radiating portion and the feedline from a closed configuration, in which the slidable outer jacket is mated with the trocar and a retracted configuration, in which the slidable outer jacket is retracted in a proximally exposing at least a portion the radiating portion.
Owner:TYCO HEALTHCARE GRP LP
High-strength microwave antenna assemblies and methods of use
InactiveUS20060282069A1Avoid mechanical failureEasy to insertSurgical needlesMicrowave therapyMicrowaveHigh intensity
Owner:TYCO HEALTHCARE GRP LP
System and method for quantum information transfer between optical photons and superconductive qubits
ActiveUS20140314419A1Modulation frequencyQuantum computersNanoinformaticsMicrowave cavityDirect coupling
An electro-optical system for exchanging quantum information between optical qubits and including a superconductive microwave cavity; an electro-optical material: a superconductive qubit circuit formed on the electro-optical material including a superconductive qubit; a dipole antenna, formed on the electro-optical material for directly coupling the superconductive qubit to the superconductive microwave cavity; an optical input for receiving input optical photons; a microwave input for receiving input microwave photons; and an optical output for outputting modulated optical photons, wherein a frequency and a phase of the optical photon is modulated with a state of the superconducting qubit by the dipole antenna.
Owner:RAYTHEON BBN TECH CORP
Choked Dielectric Loaded Tip Dipole Microwave Antenna
ActiveUS20100097284A1Surgical instruments using microwavesAntenna feed intermediatesDielectricElectrical conductor
A microwave antenna assembly is disclosed. The antenna assembly includes a feedline having an inner conductor, an outer conductor and an inner insulator disposed therebetween and a radiating section coupled to the feedline, the radiating section including a dipole antenna and a tubular dielectric loading disposed about the dipole antenna.
Owner:TYCO HEALTHCARE GRP LP
Portable wireless machine
InactiveUS20050239519A1Reduce thicknessHigh antenna gainAntenna supports/mountingsElongated active element feedElectrical conductorEngineering
An upper case (1) is connected to a lower case (2) in a hinge portion (3) so as to freely rotate. A plate shaped conductor (4) and a plate shaped conductor (5) are disposed along the surface of the case in the upper case (1). A ground plate (6) is formed in a ground pattern of a circuit board disposed in the lower case (2). The plate shaped conductor (4) and the plate shaped conductor (5) are selected by a high frequency switch (14) and connected to one end of a feeding portion (15). The other end of the feeding portion (15) is connected to the ground plate (6) to form a dipole antenna.
Owner:PANASONIC CORP
Method, system and apparatus for an antenna
InactiveUS7271779B2Easy transitionTotal current dropSimultaneous aerial operationsRadiating elements structural formsBroadbandWide band
Embodiments of the present invention provide a microstrip-coupled dipole antenna. A microstrip of the antenna may be formed on top of a printed circuit board (PCB) and coupled to a transmission line such that the microstrip is operable to transfer electromagnetic energy fed to it by the transmission line to a dipole structure on the bottom of the PCB that, in turn, radiates a broadband electromagnetic signal.
Owner:ALEREON
WLAN device having smart antenna system
InactiveUS20050058111A1Increase the number ofHigh gainNetwork topologiesData switching by path configurationOmnidirectional antennaTransceiver
A WLAN (Wireless Local Area Network) device having a smart antenna system is disclosed for increasing the number of user under a limited bandwidth and a confined environment. The WLAN device having the smart antenna system comprises: a plurality of WLAN transceiver module; and a plurality of directional antennas or array antennas installed on the WLAN transceiver modules by the way of one-to-one, wherein each of the array antennas is composed of a plurality of omni-directional antenna, such as dipole antennas.
Owner:ACCTON TECHNOLOGY CORPORATION
Tag-use antenna and tag using the same
ActiveUS20070252770A1Little changeRadiating elements structural formsAntenna feed intermediatesDielectricResonance wavelength
The present invention relates to a tag-use antenna allowing a miniaturization while maintaining a constant minimal change of a communication distance. The tag-use antenna has a feed part of a folded dipole antenna of a size of 53 mm long and 7 mm wide being connected to, and equipped with, an LSI chip of Rc=500 ohms and Cc=1.4 pF and is covered with plastic resin 13 of the dielectric constant εr=3 and thickness of t=0.75 mm on both sides of the antenna. The dipole part of 1 mm wire path width of the tag-use antenna is formed in a rectangular spiral by being bent inward from both ends at bending parts at four places. The entire length of the dipole antenna when extending the four bending parts straight is featured so as to be shorter than one half of a resonance wavelength of the antenna. An inductance part is featured in the intermediate part of the both dipole parts in the neighborhood of the center of the antenna. The inductance part is connected to the chip equipment part in parallel with the both dipole parts.
Owner:FUJITSU LTD
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