Class 343/743 - Feed coupling at spaced points on loop

Subclass of Class 343 - Communications: radio wave antennas
Definition: Subject matter wherein the antenna feed line is connected
No. of patents: 37
Last issue date: 08/03/2010

Number	Title	Issue Date
7768467	Circularly polarized loop antenna An easy-to-fabricate and relatively strong circularly polarized loop antenna of a simple construction is built. A circularly polarized loop antenna 1 has a loop section 11, which is made up of a loop-shaped conductor whose length is equal to 1 waveleng...	08/03/2010
7385561	Multiple monopole antenna The present invention seeks to provide a multiple monopole antenna including a looped conductor having at least two conductive arms extending therefrom and a common feed point located on the looped conductor. ...	06/10/2008
7315278	Multiple frequency antenna structures and methods for receiving navigation or ranging signals In a local positioning system, augmentation of the land-based system is provided by receiving signals from a GNSS. The signals from the land-based positioning system have a code phase accuracy better than one wavelength of a carrier of the signals from the GNSS. Dif...	01/01/2008
7292195	Energy diversity antenna and system An energy density diversity antenna (EDA) has a least a pair of antenna elements, whose feeding points are connected to outputs of a hybrid coupler configured such that a sum and a difference signal may exist at the feed points of the antenna elements. First reactiv...	11/06/2007
7132948	System for optimally placing radio frequency identification (RFID) antennas, tags, and interrogators A system and method for optimally placing radio frequency identification (RFID) antennas. The system varies the placement of RFID tag and interrogator antennas with respect to each other and a stationary object or objects. A signal generator sends a known reference ...	11/07/2006
7129900	Meter antenna The antenna configuration presented is an integral component of a retrofit module designed to incorporate a data telemetry transceiver within the confines of a utility meter. ...	10/31/2006
7123203	Circularly polarized wire antenna Each of the strands being powered by a single conducting wire wherein each of these strands describes an initial segment which is radial relative to a geometric axis perpendicular to the main plane, each of the strands is extended along a circle arc center on this g...	10/17/2006
7113138	Radio antennas A radio transmitting or receiving antenna which is physically compact being typically no more than three percent of a wavelength in any dimension. The antenna comprises two electrical conducting surfaces (2) and (4) across which radio frequency electri...	09/26/2006
7113148	Bifilar helical antenna A bifilar helical antenna includes an output/input unit formed by disposing a hybrid on a substrate, wherein the surface of the substrate is coated with a metallic conductive layer; the hybrid is a microstrip-line pattern formed by the conductive layer, and it furth...	09/26/2006
7076374	Methods and systems for detecting and locating damage in a wire Methods, systems, and articles of manufacture consistent with the present invention provide for identifying and locating wire damage on a wire. Broadband impedance phase and magnitude information for the wire is obtained. Potential wire damage on the wire is identif...	07/11/2006
7064723	Spectral control antenna apparatus and method A spectral control antenna apparatus includes a feed region or feed gap and a surrounding space or medium. A signal path between a feed region and a surrounding space or medium is characterized by a length dependent impedance with a plurality of extrema whereby the ...	06/20/2006
7026939	Livestock data acquisition and collection Acquiring and collecting data from a subject animal. A system includes a passive data acquisition device associable with a subject animal including: a sensor, a radio frequency identification (RFID) transponder, and a magnet separate form the transponder. The system...	04/11/2006
6956533	Antenna having a monopole design, for use in several wireless communication services A monopole antenna for use with at least two wireless communication services, having a monopole element (10) disposed along a straight line (11) and connected with a roof capacitor (1) that is designed as a flat area, the area normal line (12...	10/18/2005
6946997	Dual band antenna allowing easy reduction of size and height A radiating conductor having first and second meandering portions and capacitive conductor portions is provided on a surface of a dielectric substrate perpendicularly provided on a grounding conductor plate. The first meandering portion and one of the capacitive con...	09/20/2005
6922173	Reconfigurable scanner and RFID system using the scanner A scanner has plasma loop or plasma window antennas for selectively scanning for ID tags along distinct radials of the scanner. Scanner elements are made electromagnetically invisible to adjacent elements by removing power or lowering plasma densities so that the sc...	07/26/2005
6816122	Four-point feeding loop antenna capable of easily obtaining an impedance match In an electromagnetic coupling type four-point feeding loop antenna (10) comprising a tubular body (11), a loop portion (12) having a loop width (W1), four feeders (13) each having a feeder width (W2), and four elect...	11/09/2004
6700547	Multidirectional walkthrough antenna A flexible interrogator antenna design having a single antenna with an inner and an outer antenna coil positioned in a flat, flexible, rectangular housing or mat which can be positioned in a configuration having two sides and a top across an easily erecte...	03/02/2004
6590542	Double loop antenna Compensating electrical circuits are incorporated into loop antenna configurations for improved energy efficiency and extension of the magnetic fields for improved magnetic field coupling and reading of the tag by a reader. The tuning and compensating cir...	07/08/2003
6563469	Four-point loop antenna into which a matching circuit is integrated In order to feed at four points to a loop portion (12) made of conductor formed around a central axis (O) in a loop fashion along a peripheral surface of a cylindrical body (11) formed by rounding a flexible insulator film member (20) around the central a...	05/13/2003
6559804	Electromagnetic coupling type four-point loop antenna An electromagnetic coupling type four-point feeding loop antenna (10) comprises a cylindrical body (11) formed by rounding a flexible insulator film member (20) around a central axis (O) in a cylindrical fashion and a loop portion (12) made of conductor t...	05/06/2003
6307518	Antenna configuration of an apparatus for detecting a child safety seat placed on a seat of a motor vehicle An antenna configuration in an apparatus for detecting a child safety seat placed on a seat in a motor vehicle. A single transmitting antenna formed as a loop surrounds two loop-shaped receiving antennas. The receiving antennas receive electromagnetic mea...	10/23/2001
5995054	Communications device A communications device comprises a loop antenna having a plurality of feed terminals defining at least two terminal pairs. A controller is provided for selecting one terminal pair to enable reception or transmission from the loop antenna using the select...	11/30/1999
5767813	Efficient electrically small loop antenna with a planar base element An efficient electrically small loop antenna includes a radiation device, an impedance matching network, and a connector that interfaces to associated electronic circuitry. The radiation device includes a conductive planar base element extending in a base...	06/16/1998
5485165	Broadband high efficiency full wave open coaxial stub loop antenna A broadband, high-efficiency loop radiator is characterized by a coaxial loop one wavelength in circumference with a continuous center conductor fed through a coaxial T feed and a discontinuity of the outer shield next to the feed point of 50 ohms input i...	01/16/1996
5485166	Efficient electrically small loop antenna with a planar base element An efficient electrically small loop antenna includes a radiation device, an impedance matching network, and a connector that interfaces to associated electronic circuitry. The radiation device includes a conductive planar base element extending in a base...	01/16/1996
5128615	Resonator for a magnetic resonance imaging apparatus A resonator for use in a magnetic resonance imaging apparatus for transmitting and receiving high frequency signals is formed by a combination of two antenna sub-systems, which generate respective magnetic fields which are perpendicular to each other, wit...	07/07/1992
4987423	Wide band loop antenna with disymmetrical feeding, notably antenna for transmission, and array antenna formed by several such antennas Disclosed is a loop type antenna, fed by a coaxial line, comprising: a symmetrical, plane, loop-shaped radiating element enclosed on itself, connected to the core of the coaxial feed line at one point of the loop; a reflector plane extending in parallel to the plan...	01/22/1991
4947180	FM antenna An antenna assembly which is suited for receiving FM signals, comprises a pair of insulating disc shaped substrates which each have conductive patterns deposited on one surface thereof. The first insulating substrate has an electrically conductive loop el...	08/07/1990
4785303	Omnidirectional dipole loop antenna array An omni-directional aerial, more especially for the reception of domestic television programs in the U.H.F. band, comprises four folded dipole elements (1-4), each formed as a self-supporting open-ended wire loop (1A, 1B, 1C, 1D) integral with twin feeder...	11/15/1988
4746927	VOR antenna design A VOR antenna array with a plurality of radiating antenna elements spaced around and arranged on the periphery of an essentially circular path. The elements extend in the same direction around the periphery of the circular path and a central feed point is...	05/24/1988
4661821	Vandalism-resistant UHF antenna A vandalism-resistant antenna for the UHF band comprises a ring-shaped radiator printed on a dielectric board or disc mounted within a shallow enclosure of insulating material having high impact strength. The radiator is approximately 1/4 wavelength long ...	04/28/1987
4647937	Antenna apparatus with tuned loop An antenna apparatus including a small loop antenna element fabricated by printed circuit method, a variable capacitor for matching the antenna element to broadcasting frequency and an amplifier for the received signal. The variable capacitor and the ampl...	03/03/1987
4518965	Tuned small loop antenna and method for designing thereof The invention is directed to a tunable loop antenna design which provides impedance matching between the loop antenna and a feed line despite variations of the resonant frequency fo over a wide range of frequencies. The antenna has a maximum le...	05/21/1985
4358769	Loop antenna apparatus with variable directivity A loop antenna apparatus is disclosed which includes a main conductive loop arranged on a first surface, a plurality of supplemental conductive loops connected to the main conductive loop and arranged on different surfaces from the first surface, respecti...	11/09/1982
4236160	Loop driven element antenna system and voltage feed system A system particularly useful for feeding antennas employing one electrical wavelength closed loop driven elements. Single or dual wire transmission line sections provide impedance match between the high voltage, high impedance feed point on the loop and a...	11/25/1980
3987450	Open rectangular antenna conductively supported on mast A pair of conductive members oriented in coplanar relationship are joined at their ends to a common length of a grounded conductive support element. A first piece of conductive material extends from the center of one member to the center of the common len...	10/19/1976

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Class 343/743 - Feed coupling at spaced points on loop