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| Number | Title | Issue Date |
| 7830320 | Antenna with active elements A multi-frequency antenna comprising an IMD element, active tuning elements and parasitic elements. The IMD element is used in combination with the active tuning and parasitic elements for enabling a variable frequency at which the antenna operates, wherein, when ex... | 11/09/2010 |
| 7417549 | Automated antenna trim for transmitting and receiving semiconductor devices A radio frequency communication device and method for tuning an antenna attached thereto are disclosed. A radio frequency communication device is disclosed comprising internal circuitry and an antenna having a plurality of antenna segments associated therewith. Each... | 08/26/2008 |
| 7319435 | Balun for an antenna A balun used in high-power applications capable of accommodating a transmission line includes a core with a top surface and a bottom surface formed from soft iron material. At least two holes are provided through the core between the top surface and the bottom surfa... | 01/15/2008 |
| 7305357 | Method and system for providing and controlling delivery of content on-demand over a cable television network and a data network A system and method for delivering content on-demand by way of a cable network are disclosed. Provision of such content is controlled over a data network. Advantageously, a user interface at a conventional computing device may be used to order content and to control... | 12/04/2007 |
| 7298345 | Dipole antenna element Described is a dipole which may includes a feed line electrically coupled to a first antenna element; a balun electrically coupled to a second antenna element; and a short assembly slidably coupled to the feed line and the balun to create a short circuit at variable... | 11/20/2007 |
| 7271779 | Method, system and apparatus for an antenna 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 en... | 09/18/2007 |
| 7256751 | Fractal antennas and fractal resonators An antenna includes at least one element whose physical shape is at least partially defined as a second or higher iteration deterministic fractal. The resultant fractal antenna does not rely upon an opening angle for performance, and may be fabricated as a dipole, a... | 08/14/2007 |
| 7253737 | Automated antenna trim for transmitting and receiving semiconductor devices A radio frequency communication device and methods of testing and tuning an antenna attached thereto are disclosed. A radio frequency communication device comprises internal circuitry and an antenna having a plurality of antenna segments associated therewith. Each a... | 08/07/2007 |
| 7209096 | Low visibility dual band antenna with dual polarization A low visibility, field-diverse, dual band antenna provides cross-polarized fields enhancing signal communications. A generally flat, but helical, antenna is achieved in conjunction with a core substrate about which the antenna is wrapped, wound, or fixed. The core ... | 04/24/2007 |
| 7183988 | Directional antenna mechanism A directional antenna mechanism of a mobile radio tracking receiver, includes four antenna elements pivotably fastened to the body of the receiver. In use, the elements are turned to an operating position, in which they are pointed away from the body. After use, the... | 02/27/2007 |
| 7151497 | Coaxial antenna system An antenna system of coaxial elements and terminating impedances produces controlled bandwidth, broadband, and wideband performance under a variety of near field influences, with capability for simultaneous and alternating reception and radiation of electromagnetic ... | 12/19/2006 |
| 7116281 | Universal dipole with adjustable length antenna elements Described is a universal dipole which may include a feed line coupled to a first fitting; a balun coupled to a second fitting; a first variable length antenna element coupled to the first fitting; a second variable length antenna element coupled to the second fittin... | 10/03/2006 |
| 7109946 | Hectometric wave transmission antenna To avoid searching for a new location for very high hectometric wave antennas, an antenna according to the invention comprises an existing vertical structure having a height of at least approximately ten meters and including at least one electrically conductive elem... | 09/19/2006 |
| 7050018 | Multi-band antenna system A radio antenna having radiating conductors (28,30,32) which can be connected together by the action of antenna switch modules (20,22,24), whereby the electrical length of said antenna can be changed. Power and control signals to said antenna switch mo... | 05/23/2006 |
| 6917341 | Top-loading monopole antenna apparatus with short-circuit conductor connected between top-loading electrode and grounding conductor A top-loading monopole antenna apparatus having a feeding point is provided for use in a communication system such as a mobile communication system or the like. The top-loading monopole antenna apparatus includes a grounding conductor, a top-loading electrode, a lin... | 07/12/2005 |
| 6317099 | Folded dipole antenna A folded dipole antenna for transmitting and receiving electromagnetic signals is provided. The antenna includes a ground plane and a conductor extending adjacent the ground plane and spaced therefrom by a first dielectric. The conductor includes an open-... | 11/13/2001 |
| 6208306 | Compact, broadband antennas based on folded, top-loaded broadband dipoles with high-pass tuning elements A compact, electrically-small broadband antenna which combines a folded, top-loaded antenna geometry using broadband radiating elements with a series capacitance applied at the antenna feed is provided. The antenna can be used alone or in combination with... | 03/27/2001 |
| 5625367 | Variable capacitance antenna for multiband reception and transmission A variable capacitance antenna allows individual adjustment of linear resonators on a beam antenna. A linear resonator is associated with each dipole element on a common support boom. A variable capacitance is positioned inside the boom and created using ... | 04/29/1997 |
| 5424751 | Motor driven shunt for gamma match antenna The invention is to a gamma matching antenna in which a motor driven shunt is used to adjust the gamma match feed line. The shunt is movable along the antenna driven element and the gamma march rod on brushes or rollers that are in good electrical contact... | 06/13/1995 |
| 5187488 | Tunable high-frequency antenna Tunable high-frequency antenna which has, over its length dimension, a number of built-in switches by means of which antenna sections are defined and frequency tuning takes place through antenna length matching by disconnecting and connecting said antenna... | 02/16/1993 |
| 4785308 | Antenna Antenna for operation on a plurality of frequencies, the antenna including apex fed opposing swept elements and a plurality of stubs parallel to a central element, a plurality of capacitors connected between one end of the central element and ends of the ... | 11/15/1988 |
| 4620194 | Tunable antenna with variable series L-C network Emitting and receiving antenna system for accommodating all bands and frequencies and for operating selectively adjustably in resonance at a given emitting or receiving frequency, formed by one antenna component or two counterpart antenna components, each... | 10/28/1986 |
| 4593289 | Multi-band dipole antenna with matching stubs Antenna for operation on a plurality of frequencies, the antenna including apex fed opposing swept elements and a plurality of stubs parallel to a central element, a plurality of capacitors connected between one end of the central element and ends of the ... | 06/03/1986 |
| 4381566 | Electronic tuning antenna system At the feed side of each antenna element having transmitting conductor paths formed in continuous meandering shapes and having distributed constant impedances are electrically connected a variable tuning unit including a voltage variable reactance circuit... | 04/26/1983 |
| 4201990 | Tunable dipole antenna A radio antenna having linear radiating elements, a loading coil electrically connected to these linear radiating elements and a tuning disc located within the loading coil and rotatable about a diameter of the loading coil whereby said antenna can be eas... | 05/06/1980 |
| 4193077 | Directional antenna system with end loaded crossed dipoles An electrically directable antenna system is provided which is tunable to individual stations in the FM band. The antenna system includes a pair of crossed, forshortened dipole components which are arranged to be mutually perpendicular. Each of the dipole... | 03/11/1980 |
| 4117492 | Low profile remotely tuned dipole antenna A center-fed VHF dipole antenna structure particularly adapted for 30-80MHz peration wherein one half of the radiating structure comprises the outer conductor of a coaxial feedline which includes a low-loss cable choke at the lower end of the half dipole l... | 09/26/1978 |
| 4015265 | Folded doublet antenna A thick folded doublet antenna, the diameter of the current-receiving wire of which is on the order of ten times greater than that of the folded wire, the current-receiving wire comprising two half-wires of exterior symmetrical cylindrical form terminatin... | 03/29/1977 |
| 4005430 | Thick folded dipole which is tuneable within a frequency band of two octaves A thick folded dipole having an operating frequency which is far less than he first resonance frequency. The dipole includes a folded strand and a thick fed strand having a diameter which is about ten times greater than the diameter of the folded strand. T... | 01/25/1977 |
| 4001832 | Vertical antenna having an off-center supply A vertical grounded antenna is supplied at one third of its height. The antenna is substantially a whole wave antenna and, in order to reduce the secondary lobes of the vertical pattern of said antenna, its height is so determined as to produce an inversi... | 01/04/1977 |
| 4001833 | Whole wave vertical antenna A whole wave antenna is placed on an insulating support and has its feed input located a little above its middle. In order to reduce secondary lobes inductive reactances are serially inserted in the antenna on each side of its feed input so as to produce ... | 01/04/1977 |
