Waterborne (e.g., Buoyant Or With Watercraft) Patents (Class 343/709)
  • Patent number: 10897072
    Abstract: A stabilization adapter is provided for a portable antenna. The adapter includes a clamp, a rod and a counterweight. The clamp connects to a stand of the antenna. The rod adjustably attaches at its proximal end to the clamp. The counterweight attaches the rod at its distal end.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: January 19, 2021
    Inventors: Robert N. Iannuzzi, Aidan J. Cowhig, Alexander M. Dixon
  • Patent number: 10879614
    Abstract: A helicoidal, mixed polarization mono-conical antenna has: a supporting structure (2) with a longitudinal axis (2a); ground conductors (3) connected to an area around a first portion (4) of the supporting structure (2) defining a ground plane (21) of the antenna (1) orthogonal to the axis (2a); at least three signal conductors (7), which have respective first ends (8) that are connected to a second portion (5) of the supporting structure (2) and respective second ends (10) that are connected to a third portion (6) of the supporting structure (2) located between the first portion (4) and the second portion (5) along the axis (2a), the conductors wound in a helicoidal manner relative to the axis (2a) and shaped so as to define a substantially frusto-conical volume (12) which is coaxial to the axis (2a) and is oriented with a smaller base towards the first portion (4).
    Type: Grant
    Filed: January 13, 2018
    Date of Patent: December 29, 2020
    Inventors: Enrico Ghezzo, Antonello Giovannelli
  • Patent number: 10074897
    Abstract: The present invention relates to an underwater radio frequency antenna able to radiate in an underwater or equivalent propagation medium. It comprises a hollow conducting tube forming a resonant cavity, said conducting tube having an open end and a closed end, means of excitation of said resonant cavity which area able to be fed with signals and are arranged in such a way that the resonant cavity emits an electromagnetic radiation through said open end, at least one layer of dielectric material filling at least partially said resonant cavity so as to close the open end of the resonant cavity and render said cavity leaktight in relation to the underwater medium and to allow said electromagnetic radiation to pass through.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: September 11, 2018
    Assignee: INSTITUT FRANÇAIS DE RECHERCHE POUR L'EXPLOITATION DE LA MER—IFREMER
    Inventors: François Le Pennec, Christian Gac, Hector Fabian Guarnizo Mendez, Christian Person, Ronan Apprioual, Raymond Jezequel, Serge Pinel
  • Patent number: 9882273
    Abstract: An antenna includes a polymer coating having a VLF/LF element and an HF/VHF element embedded therein. A blocking choke is interposed between the VLF/LF element and the antenna feed t block HF/VHF signals. Small chokes are regularly positioned on the VLF/LF element to eliminate resonances caused by mutual capacitance between the elements. Reactive loads are positioned in said HF/VHF element at regular intervals for optimizing performance of the antenna in the HF/VHF radio bands. In further embodiments the antenna is provided as a floating antenna with the elements helically arranged therein.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: January 30, 2018
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David A Tonn
  • Patent number: 9854076
    Abstract: There is disclosed a mobile terminal including a case, a first antenna mounted in the case to perform wireless communication in a specific frequency band, a grounding surface mounted in the case, a receiver mounted in the case, toward a front surface of the case, a battery cover coupled to a rear surface of the case, the battery cover comprising a conductive portion, and a contact pin configured to connect the conductive portion and the grounding surface with each other, wherein the contact pin is formed in a predetermined portion where a phase of an electromagnetic field formed by the first antenna changes. The mobile terminal may adjust the HAC grade to a base grade or higher of the HAC by adjusting the position of the electromagnetic field peak, regardless of the size of the mobile terminal.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: December 26, 2017
    Assignee: LG ELECTRONICS INC.
    Inventor: Hyuk Yun
  • Patent number: 9590289
    Abstract: Communications antennae suitable for operating in harsh environmental conditions and methods for providing such antennae are disclosed. Exemplary implementations of the communications antenna may provide an ability to transmit and receive radio frequency signals while being exposed to formidable conditions for many years. Such conditions may include one or more of shallow and deep ocean, radioactive, ultraviolet, ultra cold, ultra-high pressure, and/or other harsh environments. The antenna may be ruggedized to withstand attacks by marine mammals and fish, encounters with fishing equipment including nets and lines, entanglement with marine debris, abrasion (e.g., by coral, sand, rock, and/or other objects), collision with maritime vessels and submersibles, and/or other unpredictable events. The efficient radio frequency design and efficient form factor may provide users with a small, unobtrusive device with a capacity for extensive integration in the radio frequency domain.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: March 7, 2017
    Assignee: MRV Systems, LLC
    Inventors: James Edward Dufour, Brian Kenneth Newville
  • Patent number: 9553366
    Abstract: An antenna includes a polymer coating having a VLF/LF element and an HF/VHF element embedded therein. A blocking choke is interposed between the VLF/LF element and the antenna feed to block HF/VHF signals. Small chokes are regularly positioned on the VLF/LF element to eliminate resonances caused by mutual capacitance between the elements. Reactive loads are positioned in said HF/VHF element at regular intervals for optimizing performance of the antenna in the HF/VHF radio bands. In further embodiments the antenna is provided as a floating antenna with the elements helically arranged therein.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: January 24, 2017
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David A Tonn
  • Patent number: 9515373
    Abstract: A method and system for communication with assemblies comprising shafts (e.g., drive shafts, or other rotating objects) comprising use of helical antenna based components. In this regard, a helical antenna based component may comprise one or more helical antennas surrounding or wound around a shaft, with the one or more helical antennas being electrically decoupled from the shaft, and with the helical antenna based component being configurable to communicate the signals when the shaft is stationary or rotating.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: December 6, 2016
    Assignee: The Boeing Company
    Inventors: Charles W. Manry, Jr., Manny S. Urcia
  • Patent number: 9457900
    Abstract: A multirotor mobile buoy combining MR-VTOL capability with environmentally hardened electronics, exchangeable sensor suites, and a solar recharge system and providing sensing in aquatic environments. The multirotor mobile buoy provides for the detection, classification and location of underwater objects using self-contained electronics, and repositions with aerial means using a plurality of rotors. The multirotor mobile buoy additionally incorporates solar panels for recharging of on-board batteries enabling the flight and other functions, and comprises a buoyant assembly and extended tether in order to promote stability in dynamic, open ocean environments. The multirotor mobile buoy may be employed singly or as a swarm of underwater detection platforms, and may utilize its positioning ability to optimize the effectiveness of sonobuoy systems arrayed as a distributed sensor field.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: October 4, 2016
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Kevin D. Jones, Vladmir N. Dobrokhodov
  • Patent number: 9331377
    Abstract: An underwater top-pivoting antenna assembly (or array thereof) suitable for subsurface RFID tag interrogation in flowing water such as a river. In preferred embodiments, the antenna interrogates RFID tags implanted in aquatic species. The antenna resides in an elongate antenna housing whose cross-sectional shape is preferably a symmetric hydrodynamic teardrop shape. When the assembly is deployed in water with an upper end thereof suspended above a lower end, the upper end of the housing is linked to a pivot/swivel mechanism such that when the pivot/swivel mechanism is held substantially stationary with respect to the water flow, the lower end of the housing is free to rotate generally about the first end, including in a substantially vertical plane parallel to the water flow direction. The length of the antenna housing is advantageously selected to enable the antenna to monitor for signals across substantially the entire water depth.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: May 3, 2016
    Assignee: West Fork Environmental, Inc.
    Inventors: N. Phil Peterson, Kyle B. Meier
  • Patent number: 9321529
    Abstract: A hybrid buoy system capable of aerial operation, that in some embodiments includes a wireless communication technology to allow communication with other buoys and/or an external system. In some embodiments, a swarm of buoys may be capable of surface and/or air operation. These buoys may work together to perform collective tasks that individual buoys are not capable of. Buoy swarms may be programmed for cooperative and swarm behaviors for use in a broad spectrum of missions. At least some of the buoys may be configured for specialized sensing, increasing the collective sensing capabilities of the swarm. A mixed, swappable sensor suite may be used to accommodate an array of marine exploration applications, including both military and civilian applications.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: April 26, 2016
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Kevin D. Jones, Vladimir N. Dobrokhodov
  • Patent number: 9310479
    Abstract: A transportable weather radar having radar electronics functionally located above the elevational joint and a frame superstructure rotationally connected to the elevational joint onto which is mounted a parabolic radar antenna adapted for Doppler weather radar use. The radar has a rotational drive assembly mounted below and supporting the elevational joint and a harmonic drive unit positioned inside the elevational joint so that the antennae may be rotated without significant backlash during rotational changes. A hollow center in the rotational joint allows for the passing of electronics cable through the middle of the joint and down through rotating assemblies and to electronics in or adjacent to the radar pedestal.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: April 12, 2016
    Assignee: Enterprise Electronics Corporation
    Inventors: Michael Bruce Knight, John Charles Fanning, James Rogers Helvin, Mark Alan Jones, Norman Edwin Lawrence, III, Damon Schmidt
  • Patent number: 9231297
    Abstract: There is disclosed a broadband HF antenna, which is fully integrated on a naval ship. This antenna enables to transmit and/or receive radio-frequency waves from a naval ship. The antenna comprises a radiating element and an exciting element. The exciting element excites the radiating element when fed with current. The radiating element is a structural element of the ship itself.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: January 5, 2016
    Assignee: THALES NEDERLAND B.V.
    Inventors: Maarten Clement, Jan Martinus Schouten
  • Publication number: 20140306852
    Abstract: An underwater top-pivoting antenna assembly (or array thereof) suitable for subsurface RFID tag interrogation in flowing water such as a river. In preferred embodiments, the antenna interrogates RFID tags implanted in aquatic species. The antenna resides in an elongate antenna housing whose cross-sectional shape is preferably a symmetric hydrodynamic teardrop shape. When the assembly is deployed in water with an upper end thereof suspended above a lower end, the upper end of the housing is linked to a pivot/swivel mechanism such that when the pivot/swivel mechanism is held substantially stationary with respect to the water flow, the lower end of the housing is free to rotate generally about the first end, including in a substantially vertical plane parallel to the water flow direction. The length of the antenna housing is advantageously selected to enable the antenna to monitor for signals across substantially the entire water depth.
    Type: Application
    Filed: June 24, 2013
    Publication date: October 16, 2014
    Inventors: N. Phil Peterson, Kyle B. Meier
  • Publication number: 20140292592
    Abstract: An annular vehicle having a body which defines a body axis and appears substantially annular when viewed along the body axis. The interior of the annulus defines a duct which is open at both ends. The vehicle includes an electric field (EF) coupled dipole antenna arrangement for electro-magnetic communications, which includes at least one dipole antenna. The vehicle is used as a node in an underwater communications system for communicating with other node(s) using their EF coupled dipole antenna arrangements. The electric field coupled dipole antenna arrangement can provide communications with lower latency than systems employing acoustic communications. The annular body provides good separation for electrodes of the EF coupled dipole antenna arrangement disposed around the body.
    Type: Application
    Filed: November 22, 2012
    Publication date: October 2, 2014
    Applicant: GO SCIENCE GROUP LTD.
    Inventors: Harry George Dennis Gosling, Arran James Holloway
  • Patent number: 8842051
    Abstract: The invention is a buoyant cable antenna that is towed on the surface of a body of water by a submerged underwater vehicle to allow communication coverage in an omnidirectional pattern in the VHF frequency range and that is also compatible with existing buoyant cable antenna deployment and retrieval systems. The antenna of the present invention comprises a floating cable having four identical antenna elements that are arranged in a cross configuration. The antenna is designed with a system of four shielded inductor units connected in series with the antenna elements to reduce the losses to seawater by the submerged elements and to tune the exposed vertical element and its feed-cable capacitance to resonance which results in greatly increased radiated power at the design frequency of approximately 10-30 MHz.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: September 23, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Paul M. Mileski
  • Patent number: 8829899
    Abstract: A pneumatic vibration isolating suspension is disclosed for supporting a payload on a moving carrier while suppressing the transmission of vibrations in the 1 to 50 Hz band between the carrier and the payload. The disclosed invention can be deployed in the air in a towed carrier or sonde, and operated from aircraft power, making it a suitable platform for airborne geophysical instrumentation. It also has particular application to airborne electromagnetic surveying operating in the same frequency band because the sensor vibrations that result in noise created by the modulation of the sensor coupling with the earth's magnetic field are suppressed. Furthermore, the invention can be constructed from resistive composite materials and non-magnetic metals, so it can be operated without producing significant modification to the ambient electromagnetic field being measured.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: September 9, 2014
    Assignee: Vale S.A.
    Inventors: Benjamin David Polzer, Gordon Fox West, Peter White Walker
  • Patent number: 8760355
    Abstract: The invention as disclosed is a buoyant cable antenna configured for both VLF/LF and HF signals. A 100 foot antenna element has a low-pass filter assembly positioned at the midpoint of the antenna element to block HF signals. The outboard tip of the antenna element is shorted. In this way, the antenna element appears as a 50 foot open circuit antenna element to HF signals and as a 100 foot shorted antenna element to VLF/LF signals.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: June 24, 2014
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventor: David A. Tonn
  • Publication number: 20140159966
    Abstract: An underwater antenna assembly (or array thereof) suitable for subsurface RFID tag interrogation in flowing water such as a river. In preferred embodiments, the antenna interrogates RFID tags implanted in aquatic species. The antenna resides in an elongate antenna housing whose cross-sectional shape is preferably a hydrodynamic teardrop shape. A first end of the housing is linked to a pivoting mechanism such that when the pivoting mechanism is held substantially stationary with respect to the water flow, the second end of the housing is free to rotate generally about the first end in a substantially vertical plane parallel to the water flow direction. The length of the antenna housing is advantageously selected to enable the antenna to monitor for signals across substantially the entire water depth.
    Type: Application
    Filed: June 24, 2013
    Publication date: June 12, 2014
    Inventors: N. Phil Peterson, Kyle B. Meier
  • Publication number: 20140159967
    Abstract: An underwater basal-pivoting antenna assembly (or array thereof) suitable for subsurface RFID tag interrogation in flowing water such as a river. In preferred embodiments, the antenna interrogates RFID tags implanted in aquatic species. The antenna resides in an elongate antenna housing whose cross-sectional shape is preferably a hydrodynamic teardrop shape. When the assembly is deployed in water with a lower end thereof anchored below an upper end, the lower end of the housing is linked to a pivot/swivel mechanism such that when the pivot/swivel mechanism is held substantially stationary with respect to the water flow, the upper end of the housing is free to rotate generally about the first end, including in a substantially vertical plane parallel to the water flow direction. The length of the antenna housing is advantageously selected to enable the antenna to monitor for signals across substantially the entire water depth.
    Type: Application
    Filed: June 24, 2013
    Publication date: June 12, 2014
    Inventors: N. Phil Peterson, Kyle B. Meier
  • Patent number: 8731750
    Abstract: A system for augmenting the coverage, information and robustness of an automatic identification system of ships incorporates standard AIS-type means, satellite links, coastal stations and processing centers handling the coordination of the means (maximizing the coverage of the system in time) and the processing of the data (merging of different information to create extended context information). The system implements a scheduling algorithm for the resources mobilized, in order to optimise the coverage by ensuring a given level of redundancy for the purposes of reliability and responsiveness of the system.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: May 20, 2014
    Assignee: Thales
    Inventor: Yann Oster
  • Patent number: 8614578
    Abstract: The present disclosure relates to determining the attenuation of an electromagnetic signal passing through a conductive material. An antenna is provided and placed in relatively close proximity to the conductive material. An alternating current is passed through the antenna and the impedance of the antenna is measured. The attenuation is determined using the measured impedance. A single frequency measurement may be made, or multiple measurements using different frequencies may be made. Grouped parameters based on properties of the material and the frequency of the current are used to relate the coil impedance to the attenuation. A current frequency for which the ratio of the antenna's resistive part of the impedance to the angular frequency of the current is substantially insensitive to at least one of the parameters is preferred.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: December 24, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Guozhong Gao, H. Frank Morrison, Hong Zhang, Richard A. Rosthal, David Alumbaugh, Cyrille Levesque
  • Patent number: 8604986
    Abstract: The invention concerns a device for propagating electromagnetic waves through impure water such as seawater or brackish water. The device comprises a body of polar material, for example pure water, contained in an enclosure, and an antenna arranged to emit an electromagnetic signal into the polar material. Excitation of dipoles in the polar material by the electromagnetic signal causes them to re-radiate the signal, which is thereby emitted into and relatively efficiently propagated through the water in which the device is submerged. The device offers the possibility of improved underwater communication.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: December 10, 2013
    Inventor: James Lucas
  • Patent number: 8601970
    Abstract: A tethered buoy housing and deployment system includes a housing for disposition in a vessel, a tether for interconnecting a portion of the housing and a buoy, a reel mounted in the housing and rotatable to unwind the tether, means for maintaining tension on the tether as the tether is unwound, and a platform and linkage assembly adapted to support the buoy and move the buoy between a vertical disposition for storage in the housing and an angled disposition for release of the buoy into an external fluid stream.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: December 10, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Jason M. Dorsky
  • Patent number: 8593355
    Abstract: An antenna element with a single-conductor antenna is provided within a removable core. The removable core is mounted within a hollow liner by sliding the core into the hollow liner. A pull cable may be attached to an end of the removable core to pull the core through the outboard end of the hollow liner. Due to reduced strain on the core as compared to the liner, the single-conductor antenna may be formed in segments interconnected with capacitors for adjusting the antenna gain to a maximum in the vicinity of a desired operating frequency or frequencies.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: November 26, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David A. Tonn
  • Patent number: 8474776
    Abstract: An apparatus for manually maintaining the level of a radar antenna mounted on a stern pole affixed to the deck or transom of a vessel providing a platform pivotably mounted to a distal end of the pole and oriented to rotate about an axis substantially parallel to the centerline of the vessel. A controller at the lower end of the pole proximal to the cockpit permits manual adjustment of the horizontal angle of the radar antenna to maintain level due to heeling of the boat. The controller utilizes a first plate secured to the pole having a series of detent positions angularly spaced around and equidistant from a center point and a second plate rotatably secured at the center point. A grip handle projecting from the front surface of the second plate permits rotation of the plate when a cooperatively aligned release handle is grasped to withdraw one or more pins extending through holes in the second plate engage the detent positions.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: July 2, 2013
    Inventor: Rodney Carroll
  • Patent number: 8446325
    Abstract: A hybrid cable antenna includes a first cable antenna that is buoyant and unloaded for operation in a lower portion of the high frequency band. At least one second cable antenna is serially and electrically coupled to the first cable antenna. Each second cable antenna is buoyant and loaded for operation in a portion of the high frequency band that is above the lower portion of the high frequency band.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: May 21, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David A. Tonn
  • Patent number: 8418642
    Abstract: An unmanned submersible vehicle for use in a body of liquid having a top surface and in air overlying the top surface includes a hull, an integral antenna, and an antenna positioning system. The hull has first and second opposed ends. The hull includes a first hull portion adjacent the first end and a second hull portion adjacent the second end. The antenna is disposed within the first hull portion and/or is mounted on the first hull portion. The antenna positioning system is configured to reorient the hull from a transit position to a signal position.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: April 16, 2013
    Assignee: iRobot Corporation
    Inventor: Frederick Vosburgh
  • Patent number: 8368605
    Abstract: An antenna comprising a first current probe having an aperture; a first transceiver operatively coupled to the current probe; a signal enhancer disposed approximately inside the aperture, wherein the signal enhancer comprises an inlet, a first outlet, and a housing having an internal volume, and wherein the outer dimensions of the housing are nearly equivalent to the dimensions of the aperture; a pump configured to pump electrolytic fluid through the internal volume via the inlet and the first outlet; and a first nozzle hydraulically coupled to the first outlet so that when electrolytic fluid is pumped through the internal volume the electrolytic fluid exits the first nozzle in a stream.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: February 5, 2013
    Assignee: The United States of America as represented by Secretary of the Navy
    Inventor: Daniel W. S. Tam
  • Patent number: 8368156
    Abstract: The present invention relates to a method for designing an electrically small antenna, in one embodiment, within an enclosing volume. In a preferred embodiment, the method comprises the steps of designing the electrically small antenna which has a general cross-sectional contour shape of an oblate spheroid from a top load portion to a stem portion below the top load portion. The oblate spheroid contour shape is represented by an antenna dipole moment algorithm which includes a dipole moment term. The method further comprises the steps of controlling the amplitude of the dipole moment term, including adjusting the amplitude of the dipole moment term to independently change the oblate spheroid contour shape, resulting in a change to the electric field outside the enclosing volume and a change to the electric field inside the enclosing volume.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: February 5, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Thomas O. Jones, III
  • Publication number: 20120274520
    Abstract: A positioner for an antenna intended to be placed in a given or restricted volume comprises: a first axis A? ensuring the movement of the antenna in azimuth, a third axis A? ensuring the movement of the antenna in elevation, said third axis A? being orthogonal and coplanar to the first axis A?, and a second axis of rotation A? or cross-elevation axis positioned so as to intersect said first axis A? and said third axis A? at one and the same virtual point O, said virtual point O of intersection of the three axes A?, A?, A? constituting the pivot point of the movements of said antenna mounted on the positioner.
    Type: Application
    Filed: October 21, 2011
    Publication date: November 1, 2012
    Applicants: ACC INGENIERIE ET MAINTENANCE, THALES
    Inventors: Dominique CONTI, Gwenael TOR, Philippe DESGARDIN, Alain BONNET
  • Patent number: 8207901
    Abstract: An antenna comprises first and second radiating elements for connecting to a first and second potential levels respectively. The first and second potential levels are substantially different for generating an electrostatic field from the first and the second radiating elements. The antenna further comprises first and second field shaping structures for controlling field propagation in a first and second direction respectively. The first and second field shaping structures are interdisplaced for defining a field pathway while the first and second radiating elements are disposed adjacent to the first and second field shaping structures and along the field pathway for directing the electrostatic field in a propagation direction through a liquid medium. More specifically, the propagation direction is defined by the field pathway and substantially perpendicular to at least one of the first and second directions.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: June 26, 2012
    Assignee: Agency for Science, Technology and Research
    Inventor: Jurianto Joe
  • Patent number: 8203495
    Abstract: A buoyant cable antenna system includes an HF antenna section connected to an outboard end of a VLF/LF antenna. With respect to the HF antenna, the VLF/LF appears to be a standard coaxial cable so that the HF antenna can be configured as desired for HF antenna operation. The VLF/LF antenna is comprised of a segment of coaxial cable. The inboard end of the braided outer conductor of the segment of coaxial cable is connected to ground through a capacitor so that the VLF/LF signals are effectively isolated from ground. In this way, VLF/LF currents are induced on the outer braided conductor of the segment of coaxial cable to thereby operate as the VLF/LF antenna.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: June 19, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David A. Tonn
  • Patent number: 8179327
    Abstract: A subsurface deployable antenna array is provided which expands upon deployment and contracts for storage to provide an antenna array that can be stored in a comparatively compact space. Electronically interconnected antenna modules are connected by expandable/contractable connectors. A helically-organized bundle of optical cables and electrical wiring are utilized in the expandable/contractable connectors. Mechanical, electrical, or hydraulic means may be utilized to control the spacing between the antenna modules.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: May 15, 2012
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: James H. Clark, Norbert E. Yankielun
  • Patent number: 8164530
    Abstract: A magnetic and/or magneto-electric antenna that has a plurality of conducting loops where each individual loop can be resonated at a frequency that is offset from the frequency of the other loops to provide a composite band-pass response that is broader than that of the individual loops. A receiving circuit acts to sum the signals from each of the antennas to provide a combined frequency response that is broader in bandwidth than any of the individual loops. Similarly a combination of multiple transmitter loops where a transmit circuit drives a common transmit waveform to each of the combined antennas to provide a combined transmitter frequency response that is broader in bandwidth than any of the individual loops.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 24, 2012
    Assignee: WFS Technologies Ltd.
    Inventors: Mark Rhodes, Brendan Hyland
  • Patent number: 8130155
    Abstract: A marine multiband antenna array includes a nearly virtual bow tie UHF antenna and a connected VHF/FM antenna that together function as an AM antenna. A diplexer separates the AM/FM radio signals from the UHF/VHF television signals.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: March 6, 2012
    Assignee: R.A. Miller Industries, Inc.
    Inventors: John Jeremy Churchill Platt, Paul A. Bogdans
  • Patent number: 8063838
    Abstract: The present invention is a submarine mast antenna controller for controlling a plurality of functions performed by an antenna mast of a submarine. The submarine mast antenna controller is a solid state electronic control unit on a single card that monitors various submarine mast antenna system sensors and motors, and controls electromechanical devices associated with the sensors and improves functionality over the former ACU system by consolidating control interfaces and indicators in one computer terminal via a VXI interface.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: November 22, 2011
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David A. Tonn
  • Publication number: 20110279336
    Abstract: A buoyant cable antenna system includes an HF antenna section connected to an outboard end of a VLF/LF antenna. With respect to the HF antenna, the VLF/LF appears to be a standard coaxial cable so that the HF antenna can be configured as desired for HF antenna operation. The VLF/LF antenna is comprised of a segment of coaxial cable. The inboard end of the braided outer conductor of the segment of coaxial cable is connected to ground through a capacitor so that the VLF/LF signals are effectively isolated from ground. In this way, VLF/LF currents are induced on the outer braided conductor of the segment of coaxial cable to thereby operate as the VLF/LF antenna.
    Type: Application
    Filed: May 17, 2010
    Publication date: November 17, 2011
    Inventor: David A Tonn
  • Publication number: 20110267242
    Abstract: An apparatus for manually maintaining the level of a radar antenna mounted on a stern pole affixed to the deck or transom of a vessel providing a platform pivotably mounted to a distal end of the pole and oriented to rotate about an axis substantially parallel to the centerline of the vessel. A controller at the lower end of the pole proximal to the cockpit permits manual adjustment of the horizontal angle of the radar antenna to maintain level due to heeling of the boat. The controller utilizes a first plate secured to the pole having a series of detent positions angularly spaced around and equidistant from a center point and a second plate rotatably secured at the center point. A grip handle projecting from the front surface of the second plate permits rotation of the plate when a cooperatively aligned release handle is grasped to withdraw one or more pins extending through holes in the second plate engage the detent positions.
    Type: Application
    Filed: April 28, 2010
    Publication date: November 3, 2011
    Inventor: Rodney Carroll
  • Patent number: 8044869
    Abstract: A system for mounting a wireless antenna and equipment to a stealth communication tower in coastal areas and inland waterways, camouflaged as a sailboat. The Cellboat is retrofitted to securely and discreetly store wireless transceiver equipment, and an antenna is attached at the top of the mast. Access doors are disposed in the side of the Cellboat to provide access to the equipment for maintenance purposes. The Cellboat is stored at drydock, allowing for access and protection from flooding of the equipment. Alternatively, when the Cellboat is deployed in the water, the access doors will be located on the top deck of the Cellboat.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: October 25, 2011
    Assignee: The Cellboat Company, LLC
    Inventors: Andrew Overton, Ryan Morgan, Keith P. Brown, David Altman
  • Patent number: 8004472
    Abstract: An antenna stabilizing apparatus for use on a marine vessel comprises a base body, a housing, a carrier, and a limiting member. The housing is mounted on a top of the base body and internally defines a receiving space. The carrier has at least one antenna carried thereon, and is connected to the house via a hanging member to suspend in the receiving space. The limiting member interconnects the carrier and a bottom of the housing to each other and limits a displacement range allowable for the carrier. With these arrangements, the antenna stabilizing apparatus is able to minimize the adverse influence of the rolling and pitching marine vessel on the signal receiving and transmitting via the antenna mounted on the marine vessel. Therefore, the marine vessel can navigate the sea more safely and stable wireless signal transmission via the antenna mounted on the marine vessel can be ensured.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: August 23, 2011
    Inventor: Hsin-Chi Su
  • Patent number: 8005424
    Abstract: The present invention provides a communication device and a communication method of an underwater vehicle, which use an electromagnetic field (electromagnetic wave), having a higher propagation speed than that of an acoustic wave, for communication between an underwater vehicle and a mother vessel or the like so as to allow real-time control of the underwater vehicle and the like and further to make the communication little sensitive to noise and the like. The communication device performs wireless communication between an underwater vehicle in water and an object on land or on water, and is configured to compress data to be transmitted and transmit/receive the compressed data by the use of a low-frequency electromagnetic field.
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: August 23, 2011
    Assignee: Japan Agency for Marine-Earth Science and Technology
    Inventors: Hiroshi Yoshida, Taro Aoki, Katsuki Fujimoto, Osamu Numamoto
  • Patent number: 7994992
    Abstract: A multi-band antenna comprising a conductive structure and a plurality of current probes coupled around the conductive structure. Each current probe is designed to receive and transmit in a substantially different frequency band than the other current probes. The current probes are positioned on the conductive structure so as to effectively create a plurality of transmit/receive antennas such that each respective antenna has a voltage standing wave ratio (VSWR) of less than or equal to approximately 3:1 for a given range within each respective frequency band.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: August 9, 2011
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Daniel Tam, James H. Schukantz, Jr., Robert S. Abramo, Peder Hansen, James C. Logan, David E. Hurdsman
  • Patent number: 7982679
    Abstract: An underwater communication method is provided. EM signals are transmitted via a seabed using an underwater electrically insulated magnetically coupled antenna. By making use of the low loss properties of the seabed, EM signal attenuation can be reduced and consequently the transmission range can be increased. The underwater electrically insulated magnetically coupled antenna may be located within a body of water or may be buried in the seabed.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: July 19, 2011
    Assignee: WFS Technologies, Ltd.
    Inventors: Mark Rhodes, Brendan Hyland, Derek Wolfe
  • Publication number: 20110162573
    Abstract: A towable antenna system is deployable and retrievable from and tetherable to an underwater vehicle while the underwater vehicle is submerged under water. An underwater vehicle having a towable antenna system is capable of communicating with one or more remote communication systems, the towable antenna system acting as an intermediary for communications between a submerged underwater vehicle and the one or more remote communication systems.
    Type: Application
    Filed: June 9, 2010
    Publication date: July 7, 2011
    Inventors: Roger E. Race, Jacob C. Piskura, Davis S. Sanford
  • Patent number: 7969368
    Abstract: A structural antenna system for operation in the HF frequency range, particularly for naval communications, is described, comprising at least one linear radiating arrangement (14) adapted to be operatively associated with a ground conductor (GND) and at least one electrical impedance device (Z1-Z4), in which the aforesaid linear radiating arrangement (14) is coupled to a pre-existing naval structure which has a predominantly vertical extension and is electrically conducting, such as a funnel (F). A structural antenna system with multiple feed comprises a plurality of linear radiating arrangements (114) positioned in meridian planes of the naval structure of the funnel type (F), spaced at equal angular intervals.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: June 28, 2011
    Assignee: Selex Communications S.p.A.
    Inventors: Gaetano Marrocco, Fernando Bardati, Manlio Proia, Piero Tognolatti, Lorenzo Mattioni, Raffaele Perelli, Giampiero Colasanti, Giovanni Falcione
  • Patent number: 7940524
    Abstract: A self-contained cooling system for a phased array antenna includes a cooling structure, a heat exchanger, and a pump for circulating a fluid coolant around a coolant loop. The cooling system receives power from a remote power source. The cooling structure includes a plurality of coolant inlet pipes, a plurality of coolant outlet pipes, and a plurality of cooling platforms. Each of the cooling platforms has a coolant channel that begins at one of the plurality of coolant inlet pipes, terminates at one of the plurality of coolant outlet pipes, and provides a flow path for a fluid coolant. The cooling structure further includes at least one base plate releasably mounted to at least one of the plurality of cooling platforms. One or more antenna elements associated with the phased array antenna are mounted on the base plate releasably mounted to at least one of the plurality of cooling platforms.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: May 10, 2011
    Assignee: Raytheon Company
    Inventors: Kerrin A. Rummel, Gregory Schaefer, Kevin W. Chen, Brandon H. Allen, Daniel J. Weissman
  • Publication number: 20110076940
    Abstract: The present invention provides an underwater wireless communications hotspot comprising an active zone which is circumscribed by a large closed loop antenna and within which wireless communication by means of electromagnetic signals can take place. The wireless communications hotspot of the present invention is suitable for data transfer between a communications node of the wireless hotspot and a receiver mounted on a mobile unit which is located inside the active zone of the hotspot. The wireless hotspot of the present invention provides a means for high bit rate data transfer from the communications node and the mobile unit, due to improved uniformity of coverage within the active zone of the hotspot and due to a reduction in the attenuation with distance compared to communications at positions outside the perimeter of a loop antenna.
    Type: Application
    Filed: September 25, 2009
    Publication date: March 31, 2011
    Inventors: Mark Rhodes, Brendan Hyland
  • Publication number: 20110073707
    Abstract: Methods and apparatus for marine deployment according to various aspects of the present invention may operate in conjunction with a floatable housing adapted to be deployed by a marine vehicle. The floatable housing may be adapted to be launched from a marine vehicle and rise to the surface. Assets, such as an unmanned aerial vehicle, may be deployed from the surfaced floatable housing.
    Type: Application
    Filed: September 18, 2008
    Publication date: March 31, 2011
    Inventors: DAVID E. BOSSERT, Jeffrey N. Zerbe, Ray Sampson
  • Patent number: 7868833
    Abstract: The invention as disclosed is of a buoyant cable antenna for use with underwater vehicles having improved bandwidth through the use of discrete distributed loading along the antenna. The buoyant cable antenna is designed with an antenna wire that is divided into N equal length segments of length d/2. A capacitor is coupled between every other segment such that capacitors are separated by a distance d. A shunt inductor is coupled to the antenna wire between the adjoining segments not separated by a capacitor such that the shunt inductors are separated by a distance d. This antenna design provides a substantially improved impedance bandwidth over existing prior art antennas at high frequency without increasing the physical profile of the antenna and without the use of active circuit elements.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: January 11, 2011
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David A. Tonn