Having Area Increasing Means (e.g., Spiniferous, Metal Ball On Top) Patents (Class 343/899)
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Patent number: 10483649Abstract: Aspect of the present disclosure are directed to methods and apparatus producing enhanced radiation characteristics, e.g., wideband behavior, in or for antennas and related components by providing concentric sleeves, with air or dielectric material as a spacer, where the sleeves include one or more conductive layers, at least a portion of which includes fractal resonators closely spaced, in terms of wavelength. A further aspect of the present disclosure is directed to surfaces that include dual-use or multiple-use apertures. Such aperture engine surfaces can include a first layer of antenna arrays, a second layer including a metal-fractal backplane player, and a third layer including solar cells for solar cell or solar oriented power collection. Fractal metamaterial ribbons with multiple closely-packed fractal resonators are also disclosed.Type: GrantFiled: May 7, 2019Date of Patent: November 19, 2019Assignee: Fractal Antenna Systems, Inc.Inventor: Nathan Cohen
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Patent number: 10283872Abstract: Aspect of the present disclosure are directed to methods and apparatus producing enhanced radiation characteristics, e.g., wideband behavior, in or for antennas and related components by providing concentric sleeves, with air or dielectric material as a spacer, where the sleeves include one or more conductive layers, at least a portion of which includes fractal resonators closely spaced, in terms of wavelength. A further aspect of the present disclosure is directed to surfaces that include dual-use or multiple-use apertures. Such aperture engine surfaces can include a first layer of antenna arrays, a second layer including a metal-fractal backplane player, and a third layer including solar cells for solar cell or solar oriented power collection. Fractal metamaterial ribbons with multiple closely-packed fractal resonators are also disclosed.Type: GrantFiled: June 27, 2018Date of Patent: May 7, 2019Assignee: Fractal Antenna Systems, Inc.Inventor: Nathan Cohen
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Patent number: 10030917Abstract: Systems according to the present disclosure provide one or more surfaces that function as heat or power radiating surfaces for which at least a portion of the radiating surface includes or is composed of “fractal cells” placed sufficiently closed close together to one another so that a surface (plasmonic) wave causes near replication of current present in one fractal cell in an adjacent fractal cell. A fractal of such a fractal cell can be of any suitable fractal shape and may have two or more iterations. The fractal cells may lie on a flat or curved sheet or layer and be composed in layers for wide bandwidth or multibandwidth transmission. The area of a surface and its number of fractals determines the gain relative to a single fractal cell. The boundary edges of the surface may be terminated resistively so as to not degrade the cell performance at the edges.Type: GrantFiled: December 5, 2017Date of Patent: July 24, 2018Assignee: Fractal Antenna Systems, Inc.Inventor: Nathan Cohen
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Patent number: 10014586Abstract: Aspect of the present disclosure are directed to methods and apparatus producing enhanced radiation characteristics, e.g., wideband behavior, in or for antennas and related components by providing concentric sleeves, with air or dielectric material as a spacer, where the sleeves include one or more conductive layers, at least a portion of which includes fractal resonators closely spaced, in terms of wavelength. A further aspect of the present disclosure is directed to surfaces that include dual-use or multiple-use apertures. Such aperture engine surfaces can include a top (or first) layer of antenna arrays, a middle (or second) layer of a metal-fractal backplane player, and a third (or bottom) layer for solar cell or solar oriented power collection.Type: GrantFiled: April 10, 2017Date of Patent: July 3, 2018Assignee: Fractal Antenna Systems, Inc.Inventors: Nathan Cohen, Michael Chin
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Patent number: 9035849Abstract: Aspect of the present disclosure are directed to methods and apparatus producing enhanced radiation characteristics, e.g., wideband behavior, in or for antennas and related components by providing concentric sleeves, with air or dielectric material as a spacer, where the sleeves include one or more conductive layers, at least a portion of which includes fractal resonators closely spaced, in terms of wavelength. A further aspect of the present disclosure is directed to surfaces that include dual-use or multiple-use apertures. Such aperture engine surfaces can include a top (or first) layer of antenna arrays, a middle (or second) layer of a metal-fractal backplane player, and a third (or bottom) layer for solar cell or solar oriented power collection.Type: GrantFiled: April 15, 2010Date of Patent: May 19, 2015Assignee: Fractal Antenna Systems, Inc.Inventors: Nathan Cohen, Michael Chin
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Publication number: 20150102977Abstract: Some embodiments are directed to an antenna for use in interrogating RFID tags in close proximity thereto. The antenna can include an active element configured to resonate at or close to a frequency required to read an RFID tag, the active element comprising a feed point; and a plurality of passive elements, each passive element being configured to resonate at or around a frequency corresponding to said frequency, the passive elements being arranged around the active element such that the passive elements electromagnetically couple to the active element when the active element is driven by a signal supplied through the feed point.Type: ApplicationFiled: April 29, 2013Publication date: April 16, 2015Inventors: Matthew J. Lockyear, Ian Richard Hooper, Matthew Biginton, Andrew Shaun Treen
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Patent number: 8983370Abstract: A technique is proposed for reducing leakage electromagnetic field that reduces the electromagnetic leakage from a connection point between a communication coupler and a signal transmission apparatus and that can conduct both communication and transmission of electric power. The signal transmission apparatus includes: a first sheet conductive body portion constituting a lower portion electrode; and a second sheet conductive body portion in a mesh shape which is laminated on the first sheet conductive body portion while a gap area is sandwiched therebetween and which includes an uneven mesh size area on which a sheet impedance is continuously changed.Type: GrantFiled: September 1, 2010Date of Patent: March 17, 2015Assignee: NEC CorporationInventors: Tsuneo Tsukagoshi, Naoki Kobayashi, Hiroshi Fukuda, Koichiro Nakase
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Publication number: 20140340275Abstract: An antenna includes a dielectric sheet and a conductive film. The dielectric sheet is folded into a plurality of fold segments and is configured to be compressed into a compressed state and to be expanded into an expanded state. The conductive film is disposed on a portion of the dielectric sheet. The conductive film has a pattern that defines a current path from the bottom of the dielectric sheet to the top of the dielectric sheet. The pattern is configured so that the each of the plurality of fold segments includes a portion of the pattern and so that the portion of the pattern on each fold segment is substantially non-juxtaposed with respect to the portion of the pattern on each adjacent fold segment when the dielectric sheet is fully compressed into the compressed state.Type: ApplicationFiled: May 15, 2014Publication date: November 20, 2014Applicant: GEORGIA TECH RESEARCH CORPORATIONInventors: Stavros Georgakopoulos, Emmanouil Tentzeris, Benjamin Cook
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Publication number: 20140273865Abstract: The present disclosure relates to an expandable antenna for a security system that is installed within a wall. The security system may include a control unit. The control unit may include a casing that houses one or more internal components of the control unit and a radio-frequency (RF) communication module that is situated within the casing. The RF communication module includes an antenna connected that is exposed to the exterior of the casing. An expandable antenna connects to the antenna connector. The expandable antenna is fit through an aperture in a wall and is then expanded to an enlarged size within the gap of the wall.Type: ApplicationFiled: March 14, 2014Publication date: September 18, 2014Applicant: VIVINT, INC.Inventors: Brian V. Skarda, Chester Ferry
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Patent number: 8791872Abstract: The invention relates to an omni-directional ultra-wide band antenna including at least two metallic members (14, 15, 16) provided opposite an earth plane (11) and distributed about a symmetry axis (AA) perpendicular to the earth plane (11) and at the centre of the antenna, characterised in that the metallic members (14-16) each have a narrow quasi punctual geometry at their base that flares along the symmetry axis (BB) of said metallic members (14-16) in the direction of the upper end thereof, and in that said metallic members (14-16) are oriented in a direction extending from a common point (18) of said metallic members and opposite the earth plane (11).Type: GrantFiled: January 24, 2008Date of Patent: July 29, 2014Assignee: Groupe des Ecoles des Telecommunications (ENST Bretange)Inventor: Jean-Philippe Coupez
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Patent number: 8729440Abstract: A radio frequency heater is disclosed including a vessel for containing material to be heated and a radio frequency radiating surface. The vessel has a wall defining a reservoir. The radio frequency radiating surface at least partially surrounds the reservoir. The radiating surface includes two or more circumferentially spaced petals that are electrically isolated from other petals. The petals are positioned to irradiate at least a portion of the reservoir, and are adapted for connection to a source of radio frequency alternating current. A generally conical tank or tank segment having a conically wound radio frequency applicator is also contemplated. Also, a method of heating an oil-water process stream is disclosed. In this method a radio frequency heater and an oil-water process stream are provided. The process stream is irradiated with the heater, thus heating the water phase of the process stream.Type: GrantFiled: March 2, 2009Date of Patent: May 20, 2014Assignee: Harris CorporationInventor: Francis Eugene Parsche
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Patent number: 8228241Abstract: An inverse F antenna (IFA) antenna is provided. The IFA antenna includes a ground portion, a radiation portion, a short-circuit portion and a feed-in portion. The width of the radiation portion is larger than the width of the ground portion, such that the operating band of the IFA antenna covers at least a first band and a second band at the same time. The short-circuit portion is disposed on the ground portion and is connected to the radiation portion. The feed-in portion is connected to the radiation portion.Type: GrantFiled: February 6, 2009Date of Patent: July 24, 2012Assignee: Sercomm CorporationInventor: Meng-Chien Chiang
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Patent number: 7999753Abstract: Antennas are provided which are constructed using one or more conductive via stubs as radiating elements formed in a substrate. The antennas can be integrally packaged with IC chips (e.g., IC transceivers, receivers, transmitters, etc.) to build integrated wireless or RF (radio frequency) communications systems.Type: GrantFiled: July 21, 2008Date of Patent: August 16, 2011Assignee: International Business Machines CorporationInventors: Brian Paul Gaucher, Duixian Liu, Ullrich Richard Rudolf Pfeiffer, Thomas Martin Zwick
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Publication number: 20110063189Abstract: Aspect of the present disclosure are directed to methods and apparatus producing enhanced radiation characteristics, e.g., wideband behavior, in or for antennas and related components by providing concentric sleeves, with air or dielectric material as a spacer, where the sleeves include one or more conductive layers, at least a portion of which includes fractal resonators closely spaced, in terms of wavelength. A further aspect of the present disclosure is directed to surfaces that include dual-use or multiple-use apertures. Such aperture engine surfaces can include a top (or first) layer of antenna arrays, a middle (or second) layer of a metal-fractal backplane player, and a third (or bottom) layer for solar cell or solar oriented power collection.Type: ApplicationFiled: April 15, 2010Publication date: March 17, 2011Applicant: Fractal Antenna Systems, Inc.Inventors: Nathan Cohen, Michael Chin
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Publication number: 20100156742Abstract: An antenna device includes a teardrop-shaped element including a cone-shaped part and a spherical surface part geometrically combined so that the spherical surface part is in contact with the cone-shaped part on its bottom-surface side; a ground plate opposed to the apex of the cone-shaped part of the teardrop-shaped element; and a coaxial line having an inside conductor connected to the apex of the cone-shaped part of the teardrop-shaped element and having an outside conductor connected to the ground plate. The ground plate defines a surface of a metal enclosure of a device to be connected to the antenna device, the device having at least one of a transmission function and a reception function.Type: ApplicationFiled: October 8, 2009Publication date: June 24, 2010Inventors: Masahiro Yanagi, Shigemi Kurashima, Takashi Arita
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Publication number: 20100156743Abstract: An antenna device includes an oval-shaped element which is formed by geometrically combining a spherical portion and a conical portion so that the spherical portion is tangent to a bottom side of the conical portion. A ground plate is arranged to face a vertex of the conical portion in the oval-shaped element. A coaxial line includes an inner conductor and an outer conductor, the inner conductor being connected to the vertex of the conical portion of the oval-shaped element and the outer conductor being connected to the ground plate. A conductive reflecting plate is arranged on the ground plate to reflect a receiving radio wave or a transmitting radio wave.Type: ApplicationFiled: November 23, 2009Publication date: June 24, 2010Inventors: Masahiro Yanagi, Shigemi Kurashima, Takashi Arita
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Publication number: 20100127953Abstract: An antenna is disclosed. The antenna comprises a first antenna element; a second antenna element arranged along the first antenna element; and an electroactive polymer element arranged between the first and the second antenna elements, wherein the electroactive polymer element is connected to electrodes through which a voltage is applicable across the electroactive polymer element such that the distance between the first and the second antenna elements is adjustable by changing the voltage. An antenna arrangement and a radio communication apparatus are also disclosed.Type: ApplicationFiled: November 25, 2008Publication date: May 27, 2010Applicant: SONY ERICSSON MOBILE COMMUNICATIONS ABInventor: Daniel WIK
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Publication number: 20090267864Abstract: A patched inverse F antenna (PIFA) antenna is provided. The PIFA antenna includes a ground portion, a radiation portion, a short-circuit portion and a feed-in portion. The width of the radiation portion is larger than the width of the ground portion, such that the operating band of the PIFA antenna covers at least a first band and a second band at the same time. The short-circuit portion is disposed on the ground portion and is connected to the radiation portion. The feed-in portion is connected to the radiation portion.Type: ApplicationFiled: February 6, 2009Publication date: October 29, 2009Applicant: SERCOMM CORPORATIONInventor: Meng-Chien Chiang
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Patent number: 6933909Abstract: A wireless telecommunications device is disclosed including a plurality of wireless antennas, each respectively for transmitting and/or receiving wireless signals into a predetermined sector of an omnidirectional space. A mounting structure is included for retaining the respective plurality of wireless antennas, wherein the mounting structure is configured so as to isolate the respective wireless signals.Type: GrantFiled: March 18, 2003Date of Patent: August 23, 2005Assignee: Cisco Technology, Inc.Inventor: David M. Theobold
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Patent number: 6870514Abstract: A monopole antenna having a ground plane, a vertically extending feed line passing through a feed hole in the ground plane, a top hat in the shape of a disk connected to the feed line, the top hat being spaced from and extending over at least a portion of the ground plane, and a matching network disposed in a space between the top hat and ground plane, the matching network being arranged to effectively extend the feed hole in the ground plane. Such an antenna structure improves antenna bandwidth without increasing antenna volume or requiring external matching circuitry.Type: GrantFiled: June 20, 2003Date of Patent: March 22, 2005Assignee: Honeywell International Inc.Inventor: Robert G. Simpson
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Patent number: 6292152Abstract: A disk antenna for use in a PCMCIA card or the like having a disk made from conventional moldable plastics and a radiating element that has a low capacitive impedance relative the inductance of the antenna feed such that the tuning element is capacitive. The disk antenna maximizes the ratio of bandwidth to disk size by maximizing the surface area of the radiating element. The antenna is application specific in that it can be adapted for various environmental resonant variations.Type: GrantFiled: September 29, 1998Date of Patent: September 18, 2001Assignee: Phazar Antenna Corp.Inventors: John Cosenza, John Kryspin
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Patent number: 6140975Abstract: An antenna system includes a ground counterpoise or a top-hat located load assembly having at least one element whose physical shape is at least partially defined as a first or higher iteration deterministic fractal. The resultant ground counterpoise may rely upon an opening angle for performance, and produces a more compact antenna system relative to prior art non-Euclidean ground counterpoise elements. A vertical antenna system may be fabricated with fractal ground elements and a vertical element that may also be a fractal. Gain characteristics of antenna systems utilizing a fractal ground counterpoise are no worse than prior art, larger, systems, and exhibit improved vertical polarization characteristics, and a termination impedance of about 30.OMEGA.. A vertical antenna system preferably includes vertically spaced-apart fractal conductive and passive elements, and one or more fractal ground elements.Type: GrantFiled: November 7, 1997Date of Patent: October 31, 2000Inventor: Nathan Cohen
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Patent number: 6054964Abstract: In an umbrella top-loaded monopole (UTLM) antenna, the charge distribution n top-load radials increases approximately linearly from the top of the antenna because the activated top-load wires are separating from the tower and each other at the same time they are getting closer to ground. The UTLM antenna of the invention incorporates a top-load configuration in which top-load elements, whether they be radiating or receiving, are arranged in sections of rhombic-shaped frames that originate at the top of the antenna and that extend away from the antenna towards the antenna's base where, at those points of the configuration furthest from the antenna tower and closest to ground at least two top-load elements converge to shield each other and hence reduce charge density. The top-load sections are disposed between the vertical guy wire planes of an antenna to ease their installation, repair and maintenance. The self-shielding effect of the invention permits an antenna to operate at considerably higher voltage.Type: GrantFiled: May 30, 1997Date of Patent: April 25, 2000Assignee: The United States of America as represented by the Secretary of the NavyInventors: Peder M. Hansen, James H. Schukantz, Robert D. Prince
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Patent number: 5831579Abstract: A latch mechanism for a cellular phone includes a rotatable detent portion attached to the helix of the antenna. A fixed detent member permanently attached to the phone includes a passageway to allow the antenna and rotatable detent to pass therethrough. A biased teeth is mounted between a plurality of guide detents formed on the inner surface within the fixed detent member and the base of the phone. While the teeth ring is allowed to move axially, it is keyed to prevent rotation. Accordingly, the detents formed on the rotatable detent member cause the rotatable detent member to rotate as it passes between the guide detents and as it engages the teeth ring. The forced rotations cause the detents of the rotatable detent portion to become engaged and disengaged with a latching undercut portion formed on a bottom portion of the guide detents.Type: GrantFiled: April 15, 1997Date of Patent: November 3, 1998Assignee: Ericsson, Inc.Inventor: Charles Albert Rudisill
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Patent number: 5673055Abstract: In an umbrella top-loaded monopole (UTLM) antenna, the charge distribution on top-load radials increases approximately linearly from the top of the antenna because the activated wires are separating from the tower and each other at the same time they are getting closer to ground. The UTLM antenna of the invention incorporates a top-load configuration in which top-load elements, whether they be radiating or receiving, are arranged in the shape of frames that originate at the top of the antenna and that extend away from the antenna towards the antenna's base where, at those points of the configuration furthest from the antenna tower and closest to ground at least two top-load elements converge to shield each other and hence reduce charge density. The top-load frames may be arranged contiguously such as in a rosette configuration. The self-shielding effect of the invention permits an antenna to operate at considerably higher voltage.Type: GrantFiled: April 21, 1994Date of Patent: September 30, 1997Assignee: The United States of America as represented by the Secretary of the NavyInventor: Peder M. Hansen
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Patent number: 5353493Abstract: A whip antenna made of a material having high tensile strength, such as stainless steel, including a tapered antenna body and a rounded end, both formed as a single integral unit. The antenna is formed by beating a rod having high tensile strength towards its center and pulling the rod in one direction to form the rod into a tapered shape and forming a rounded top section at the tapered end.Type: GrantFiled: June 12, 1992Date of Patent: October 11, 1994Assignee: Harada Kogyo Kabushiki KaishiInventors: Jiro Harada, Heizo Tsuchida
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Patent number: 5329287Abstract: A device is provided for use in a helical antenna having an antenna element wound about the periphery of a dielectric support post, the post being in the form of a tube or cylinder. The device has an electrically conductive member electrically connected to one end of said antenna element. The conductive member is of any appropriate shape or configuration and is operable to increase the loading on the antenna whereby standing waves on the antenna element are reduced and a more uniform electrical current is produced along the antenna element.Type: GrantFiled: June 4, 1992Date of Patent: July 12, 1994Assignee: CAL CorporationInventor: Peter C. Strickland
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Patent number: 5218372Abstract: A new wide-frequency-band spherical antenna structure which comprises a spherical antenna, an insulating sleeve, an impedance-matching element, a fixed disc, a center-needle seat, and a socket member with a high-frequency connector; the impedance-matching element (inductance coil) is to be fitted in the spherical antenna and the socket member; the impedance-matching element and the socket member of the high-frequency connector form an impedance-matching network to provide a nominal capacitance; the structure not only can facilitate the assembling procedures thereof, but also can omit the test and adjustment procedures as required by the conventional antenna; moreover, such an antenna has a small size without affecting the excellent reception efficiency.Type: GrantFiled: May 15, 1992Date of Patent: June 8, 1993Inventor: Chen-Sheng Cheng
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Patent number: 5216436Abstract: A collapsible `bedspring` monopole antenna is configured to be effectively non-observable in its collapsed condition and, when deployed, remains sufficiently compact to ensure very low observability characteristics, while providing broadband coverage over a wide viewing aperture. The antenna is comprised of a conductor formed as a tapered helix. One end of the conductor is coupled to an antenna feed. The outer end of the helix is looped around on itself to form a circular loop. A plurality of substantially rectilinear `radials` are soldered to distributed locations around its circular loop, so as to extend outwardly and tangentially from the outer perimeter of the loop and provide `top hat` capacitive matching elements. To define the height of the deployed antenna and to electrically short out plural locations of the helix, a plurality of conductive straps are joined to respective spaced apart locations of the helix.Type: GrantFiled: May 31, 1991Date of Patent: June 1, 1993Assignee: Harris CorporationInventors: John P. Hall, Thomas J. Kabana, Albert J. Massanova, M. Phillip Arnold
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Patent number: 5166696Abstract: Provided is a method and apparatus for deploying an inflatable antenna from a compressed storage position on the trailer bed of a transport vehicle. A support structure is provided having a pair of spaced apart actuating rails for engagement with the antenna during deployment and a storage compartment stored on the trailer bed of the transport vehicle. The storage compartment is formed of a base wall which is pivotally affixed to both the trailer bed and one end of the compressed antenna, and a deployment structure affixed to the opposing end of the compressed antenna. The deployment structure is partitioned lengthwise to form first and second shelter compartments which are hinged together at one end and pivotable with respect to one another between a closed storage position and an open A-frame position.Type: GrantFiled: November 20, 1990Date of Patent: November 24, 1992Assignee: LTV Aerospace and Defense Co.Inventors: Richard B. Rupp, Richard J. Blum
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Patent number: 4692772Abstract: A supplemental device is provided for mounting on a rod-type antenna for CB radio, cellular telephone, telephone, television and satellite communications for reducing the overall noise level in connection with the operation of, for example, the squelch control structure of the associated radio apparatus. The device comprises a pair of assemblies each having at least one ring and a plurality of cooperable radially-extending rods symmetrically arranged and intersecting the axis of the associated ring or rings, with such rings and rods secured in rigid relation any lying in substantially a common plane. The assemblies are disposed in spaced parallel planes and rigidly connected substantially of their common axis by a cross member which is adapted for adjustable securement to an antenna, whereby the supplemental device may be secured to the antenna at an optimum location therealong, with the antenna extending in a plane parallel to and between the first-mentioned planes.Type: GrantFiled: September 13, 1984Date of Patent: September 8, 1987Inventor: Joseph P. Bell
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Patent number: 4443803Abstract: A low-profile survivable antenna suitable for military use is described. pite its small size, which might be one tenth of a wavelength, the antenna has reasonable transmission range for these applications. Very little operator attention is needed in use, since a special matching circuit within the antenna network enables effective impedance matching, over a 3:1 frequency range, without necessity of switching to different matching circuits over different frequency bands. By including resistive components along with other passive inductive or capacitive elements, the reactance of the single matching circuit is made to effectively compensate the antenna's impedance over the entire frequency range. The impedance of the circuit has a decreasing positive reactance which compensates for the decreasing negative reactance, with frequency, of the antenna.Type: GrantFiled: November 23, 1981Date of Patent: April 17, 1984Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Charles M. DeSantis, Albert H. Zannella, Michael W. Begala, John R. Wills, Watson P. Czerwinski
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Patent number: 4366486Abstract: A top-loaded low profile antenna for data transponders includes an antenna pin mounted vertically, affording vertical polarization for the antenna, an aluminum plate mounted in a horizontal plane and connected to an upper end of the pin, providing top-loading of the antenna, the plate being supported by a lucite frame mounted on an upper surface of the data transponder and which also dielectrically loads the antenna feed region. The load plate and lucite frame enclose the antenna pin so that the antenna is less susceptible to vandalism, and the top-loading results in a reduction in the height of the antenna structure improving the aesthetics of the antenna and data transponder installation.Type: GrantFiled: March 16, 1981Date of Patent: December 28, 1982Assignee: Northern Illinois Gas CompanyInventor: Peter P. Toulios
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Patent number: 4328501Abstract: A low-profile survivable antenna suitable for military use is described. pite its small size, which might be one tenth of a wavelength, the antenna has reasonable transmission range for these applications. Very little operator attention is needed in use, since a special matching circuit within the antenna network enables effective impedance matching, over a 3:1 frequency range, without necessity of switching to different matching circuits over different frequency bands. By including resistive components along with other passive inductive or capacitive elements, the reactance of the single matching circuit is made to effectively compensate the antenna's impedance over the entire frequency range. The impedance of the circuit has a decreasing positive reactance which compensates for the decreasing negative reactance, with frequency, of the antenna.Type: GrantFiled: April 23, 1980Date of Patent: May 4, 1982Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Charles M. DeSantis, Albert H. Zannella, Michael W. Begala, John R. Wills, Watson P. Czerwinski
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Patent number: 4313121Abstract: A VHF monopole antenna unit, particularly adapted for operation in the 30 MHz frequency range, yet capable of embodiment in a compact structure only approximately 11/2 feet in height is described. Coarse tuning is accomplished in a number of switched bands, for each of which is provided a specially designed matching network comprised of inexpensive L-networks of inductors and capacitors. Tuning is accomplished through adjustment of inductor elements. The simple, inexpensive design of the matching circuits eliminates need for intricate mechanisms typically used for automatic impedance matching over a wide band and also for a broadband impedance matching transformer. The compactness made available by the unique top-load structure design is further made possible by provision of a specially designed dielectric filled vertical antenna element, accomplishing the same range and efficiency in an even more compact antenna.Type: GrantFiled: March 13, 1980Date of Patent: January 26, 1982Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Donn V. Campbell, Charles M. DeSantis, John R. Wills
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Patent number: 4238801Abstract: A supplemental device for mounting on a rod-type antenna, particularly the antenna of a mobile C-B installation, for reducing the overall noise level in connection with the operation of the squelch control, utilizing a pair of assemblies each having at least one ring member and a plurality of cooperable radially extending rod members symmetrically arranged and intersecting the axis of the associated ring member, with such ring and rod members secured in rigid relation and lying substantially in a common plane, such assemblies being disposed in spaced parallel planes and rigidly connected substantially on their common axis by a cross member having means cooperable therewith for adjustably securing the device to an antenna, whereby it may be secured thereto at an optimum location therealong, with such antenna extending thereat in a plane parallel to said first mentioned planes.Type: GrantFiled: May 4, 1979Date of Patent: December 9, 1980Inventor: Joseph P. Bell
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Patent number: 4208662Abstract: An omnidirectional, vertically polarized antenna having a lower, 1/4 wavelength skirt made up of circumferentially-spaced arms which extend down from the lower end of a vertical, 1/4 wavelength, upper radiator at an angle between 12 degrees and 25 degrees, and preferably 17 degrees. The upper radiator carries a multi-spoke capacity "hat" to increase its electrical length.Type: GrantFiled: June 7, 1977Date of Patent: June 17, 1980Assignee: Orion Industries, Inc.Inventors: Dale W. Horn, William A. Wickline
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Patent number: 4051479Abstract: A vertical dipole antenna for the ELF (extremely low frequency) range. The antenna provides a series resonant circuit consisting of an inductor and the distributed capacitance of the conductor such as a wire which may be carried by lighter-than-air craft. The lighter-than-air craft may be conductive, in which case it contributes to the capacitance or the capacitance may be solely represented by the wire. The antenna may be frequency or phase modulated. In case of frequency modulation the frequency of the generator must be changed accordingly so that the series resonant circuit remains resonant at the frequency to be radiated. The antenna can be readily moved. A plurality of antennas may be provided to form a super-radiant array.Type: GrantFiled: March 17, 1976Date of Patent: September 27, 1977Assignee: TRW Inc.Inventor: Saul Altshuler
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Patent number: 3999183Abstract: A floatable radio antenna (releasable from a submarine) includes a solid hemisphere of conductive material concentric with a hollow hemisphere of dielectric material. The hemispheres are contained in a floatation jacket which carries them above the surface of a liquid on which the jacket floats. Concentric spheres may be used if desired. The dielectric material permits an antenna of small physical dimensions.Type: GrantFiled: June 19, 1975Date of Patent: December 21, 1976Assignee: Plessey Handel und Investments A.G.Inventor: John Golden Brett