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7609213 |
Two-branch broadband antenna
A broadband antenna is capable of generating an upper resonant mode (at about 700 MHz) from a first radiating arm and a lower resonant mode (at about 500 MHz) from a second radiating arm. The first...
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7411559 |
Headset loop antenna
A headset has a first and an optional second earpiece 12, 16 respectively coupled to a plug 30 via first and an optional second conductors 14, 20, 18, 22 . An antenna loop section 36 has a...
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7315287 |
Antenna device having enhanced reception sensitivity in wide bands
An antenna device includes a rectangular parallelepiped base member made of a dielectric or magnetic material, a band-shaped first radiation conductor, including a plurality of divided first...
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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...
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7289075 |
Planar antenna
There are disposed first coupling conductors, which comprise a pair of coupling branch lines 1 and 2 connected to the first antenna conductor 3 and extend inward from the first antenna...
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7253779 |
Multiple antenna diversity for wireless LAN applications
An antenna system comprising a plurality of antennas designed and oriented to provide one or more of radiation pattern, signal polarization and spatial diversity. The various diversity operational...
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7071887 |
Antenna device capable of being tuned in wide band
The present invention provides an antenna device capable of automatically obtaining excellent receiving sensitivity over a wide band. The antenna device comprises a rod-shaped base made of a...
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7053846 |
Spherical ring antenna
An antenna includes a radiating ring element formed as a spherical sector or about a one-half wavelength circumference in natural resonance for obtaining uniform current distribution and enhancing...
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7034760 |
Antenna device and transmitter-receiver using the antenna device
An antenna device of transmission line type having two antenna elements opposed to each other, and a signal is fed between the two antenna elements. A variable-capacitance unit capable of changing...
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6961024 |
Transmitting and receiving apparatus
An antenna for transmitting information by means of electromagnetic fields in free space is formed as a supertoroidal conductor, comprising a helical coil of wire with the coil itself being wound...
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6960984 |
Methods and systems for reactively compensating magnetic current loops
Methods and systems for compensating magnetic current loops provide current magnitude and phase uniformity within the magnetic current loops. A magnetic current loop is divided into k sections....
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6919857 |
Differential mode capacitively loaded magnetic dipole antenna
Differential mode capacitively loaded magnetic dipole designs are provided for usage in various applications. Impedance matching may be accomplished with changes to antenna structures without...
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6906672 |
Planar Antenna Arrangement
An antenna arrangement for use over a metallic surface in motor vehicles is adapted to improve reception in the AM frequency range. An FM loop includes two conductor sections separated by a...
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6900773 |
Active configurable capacitively loaded magnetic diploe
A capacitively coupled dipole antenna is provided with one or more active control elements. The active control elements may be used to effectuate changes in the operating characteristics of the...
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6864844 |
Antenna device capable of being commonly used at a plurality of frequencies and electronic equipment having the same
In an antenna device 10 including a line-shaped or belt-shaped first conductor 11 having an electrically half length of a wave-length of a first resonant frequency, a feed point 12 to which...
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6856288 |
Ferrite loaded meander line loaded antenna
A meander line loaded antenna is provided with a ferrite donut surrounding a portion of the meander line so as to effectively lower the operating range of the meander line loaded antenna by as much...
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6844859 |
Loop antenna, loop antenna system and wireless communication system
A loop antenna is constructed by bending a linear conductor so that it forms concavo-convex portions within an antenna plane. As an example, the shape of the loop antenna comprises a long straight...
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6753816 |
Dual band/dual mode meander line antenna
A dual band/dual mode meander line antenna which include a ground plane, and a pair of substantially vertical radiating surface elements disposed substantially parallel to one another and...
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6690331 |
Beamforming quad meanderline loaded antenna
Meanderline loaded antennas having a wide bandwidth available for simultaneous or instantaneous use are disclosed. In one embodiment, the azimuthal angle of arrival associated with the antenna is...
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6677915 |
Shielded spiral sheet antenna structure and method
The shielded spiral sheet antenna concept permits a small efficient antenna structure that is much smaller than the electromagnetic wavelength. In such small structures, the radiation usually goes...
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6630909 |
Meander line loaded antenna and method for tuning
The present invention offers an alternative method of tuning a meander line antenna. A layer of PN semiconductor material is inserted between a ground plane and a base element. A dc voltage is...
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6600452 |
Loop antenna parasitics reduction technique
An antenna circuit and matching technique that cancels the inductive reactance of an antenna and thereby reduces the reactive voltage of the antenna are provided. Serial tuning capacitors are...
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6600451 |
Ring resonator and antenna
Two conducting lines are arranged in a ring form in a TEM-mode transmission line. The end of one of the lines is connected to the end of the other line with opposite polarity, thus forming a...
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6597321 |
Adaptive variable impedance transmission line loaded antenna
There is disclosed a meanderline-loaded antenna comprising a ground plane, a non-driven element affixed substantially perpendicular to the ground plane, a driven element affixed substantially...
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6590543 |
Double monopole meanderline loaded antenna
A wideband double monopole meanderline loaded antenna having a single feed a single feed is disclosed. Equalizing delay lines of the antenna can be manipulated to equalize reactance of the antenna...
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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...
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6492953 |
Wideband meander line loaded antenna
A meander line loaded antenna provides a wide instantaneous bandwidth with a first planar conductor extending orthogonally from a ground plane, a second planar conductor substantially parallel to...
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6489925 |
Low profile, high gain frequency tunable variable impedance transmission line loaded antenna
There is disclosed a meanderline-loaded antenna comprising a ground plane, a non-driven element affixed thereto, a driven or receiving element affixed thereto and a horizontal element between the...
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6486844 |
High gain, frequency tunable variable impedance transmission line loaded antenna having shaped top plates
There is disclosed a meanderline loaded antenna comprising a ground plane, a non-driven vertical element affixed thereto, a driven vertical element and a shaped top radiating element conductively...
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6480158 |
Narrow-band, crossed-element, offset-tuned dual band, dual mode meander line loaded antenna
The present invention features a dual-band meander line loaded antenna (MLA) that operates in a loop mode for a first frequency band and utilizes capacitive tuning to adjust the monopole resonant...
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6469675 |
High gain, frequency tunable variable impedance transmission line loaded antenna with radiating and tuning wing
There is disclosed a meanderline loaded antenna comprising a ground plane, two vertical elements orthogonally affixed thereto, and a horizontal element between the two vertical elements. A...
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6404391 |
Meander line loaded tunable patch antenna
The present invention features a compact tunable meander line loaded patch antenna where switches or the like are used to electrically connect and disconnect sections of the meander line adjusting...
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6384792 |
Narrowband/wideband dual mode antenna
The present invention features a dual mode, meander line loaded antenna (MLA) having an additional wideband plate or hat located above the horizontal top surface of the MLA antenna. The upper plate...
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6373440 |
Multi-layer, wideband meander line loaded antenna
A meander line loaded antenna (MLA) that utilizes more two or more layers of meander lines to greatly extend the operating frequency range. The antenna of the present invention can achieve an...
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6320550 |
Contrawound helical antenna
A contrawound helical antenna produces a uniformly directed circulation of magnetic current with a plurality of magnetic dipole elements. In one embodiment, the magnetic dipole elements have the...
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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...
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6304230 |
Multiple coupled resonant loop antenna
A loop antenna which is electrically small relative to a wavelength of a signal which it is designed to receive. The antenna is an electrically small, low profile, band switchable antenna which can...
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6300920 |
Electromagnetic antenna
An electromagnetic antenna includes a multiply connected surface, such as a toroidal surface; a first conductive loop proximate to the toroidal surface; a second conductive loop proximate to the...
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6239760 |
Contrawound toroidal helical antenna
An electrically small broadband antenna comprises a plurality generalized contrawound toroidal helical antenna elements, each made from a single continuous conductor divided into two length...
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6133886 |
Antenna for a wireless communication module
An antenna (28) for use in a wireless communication module (10) includes a shield plate (40), an antenna loop element (42), and a transmission line element (44). The wireless communication module...
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6118411 |
Loop antenna and antenna holder therefor
A closed loop is formed by loop antenna elements which equivalently function as inductance, a capacitor inserted in such a manner as to divide the loop antenna into the loop antenna elements, and...
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6108213 |
Retainer for electronic apparatus
A retainer for an electronic apparatus includes a housing member in the form of a frame, an antenna holding member, and rib elements for assuring a distance between a main printed board and a...
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6104354 |
Radio apparatus
A small radio apparatus such as a pager has a printed circuit loop antenna(12) comprising a generally elongate loop formed by first and second electrical conductors(22,24) interconnected by first...
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6028559 |
Loop antenna
A first loop antenna apparatus is disclosed which includes an open loop antenna portion and an inductor having a predetermined inductance and first and second ends connected to first and second...
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6025813 |
Radio antenna
A radio antenna system comprises a single low impedance feed socket coupled to a junction point splitting the feeder power into two separate circuits each of which passes approximately half the...
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6016129 |
Antenna system, in particular an antenna system for traffic communicating systems
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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...
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5952978 |
Contrawound toroidal antenna
An electrically small antenna is disclosed that is constructed from a generalized contrawound toroidal helix made from a single continuous conductor divided into two length portions each of which...
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5943022 |
Portable communication device including loop antenna
A portable communication device is described comprising a loop antenna. The loop antenna consists of a dielectric strip with overlapping conductive plates on both sides, so that capacitors are...
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5936586 |
VHF-UHF waveguide non-metal and metal detector
A VHF-UHF waveguide non-metal and metal detector is disclosed having a waveguide antenna system of aluminum tubing with 4 aperture/slits at critical angles including dielectric centers in...
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