Single Adjustable Length Electrically Long Linear Antenna Patents (Class 343/723)
  • Patent number: 11435067
    Abstract: The invention relates to a lighting assembly (1), comprising an extendible mast (2) constructed and arranged so as to be configurable between a coiled form and an extended form, wherein when extended the mast is resiliently biased in the form of an elongate tube having a slit along its length and wherein when coiled the mast is wound about an axis extending transversely to the longitudinal extent of the mast; and, a lighting element (6) supported by the mast and extending along at least a portion of the mast.
    Type: Grant
    Filed: March 3, 2021
    Date of Patent: September 6, 2022
    Assignee: RTL MATERIALS LTD.
    Inventors: Richard Wood, Jean-Christophe Detis
  • Patent number: 9899746
    Abstract: An electronically steerable helical or spiral antenna includes a monopole antenna element disposed within at least one helical or spiral antenna element. The antenna can be electronically steered, i.e., its radiation pattern can be altered, such that the antenna radiates in a desired direction, without mechanically changing a direction in which the antenna is aimed and without mechanically changing orientation of any of the antenna's elements, by adjusting amplitude and phase of a signal fed to the monopole antenna element, relative to a signal fed to the at least one helical or spiral antenna element.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: February 20, 2018
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: John E. Grandfield, Phillip Hulse, Matthew Shea, Michael P. Abban
  • Patent number: 9887461
    Abstract: A re-reconfigurable built-in antenna of a portable terminal is provided. The antenna includes an antenna radiator having a feeding pad electrically connected to a feeding portion of a main board of the terminal and at least one ground pad disposed in a position different from that of the feeding pad for selectively establishing an electrical connection to a ground portion of the terminal, and a switching element, commonly connected to the at least one ground pad of the antenna radiator, for selectively establishing an electrical connection to the ground portion by a switching operation. The antenna radiator changes a shape of the antenna radiator by using the selective electrical connection of the ground portion so as to have various operational frequency bands and radiation properties.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: February 6, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-U Kim, Austin Kim, Dong-Hwan Kim, Jae-Ho Lee, Jung-Ho Park
  • Patent number: 9300052
    Abstract: An adjustable antenna system for transmission and/or reception of electromagnetic waves enables adjustment of the length of an antenna cable for adjustably tuning one or more operating parameters of the antenna. The antenna system can include a spindle frame that can support a first spool and a second spool that are rotatably mountable on the spindle frame. Wrapped around the first spool can be a length of antenna cable and wrapped around the second spool can be a length of non-conducting line. The distal ends of the cable and line can be connected so that as spools are selectively rotated independently or dependently, the relative lengths of the cable and line are changed. The antenna system can further include a transmission bus partially disposed along the spindle frame to establish communication between the antenna cable and a connector for connecting to a transmitter/receiver associated with the antenna system.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: March 29, 2016
    Inventor: Robert F. Schweppe
  • Patent number: 9105963
    Abstract: A tunable antenna is formed on a boom. First and a second opposed non-conductive support pole extend from a first end of the boom. Third and a fourth opposed non-conductive support pole extending from a second end of the boom. Each pole has a wire guide at its end. First and second spools are mounted near the first end of the boom. Third and fourth spools are mounted near the second end of the boom. First and second wires are spooled on the first and second spools. A third wire is spooled on the third spool and mechanically coupled to the first wire by a non-conductive cord, the first and third wires running through the first and third pole guides. A fourth wire is spooled on the fourth spool and mechanically coupled to the second wire by non-conductive cord, the second and fourth wires running through the second and fourth pole guides.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: August 11, 2015
    Assignee: Fluidmotion, Inc.
    Inventor: Michael E. Mertel
  • Publication number: 20150138027
    Abstract: A method includes determining a configuration of an antenna. The method also includes selecting a first light source of a plurality of light sources based on the configuration. The method further includes activating the first light source and transmitting an optical signal to a first active filter node of a plurality of active filter nodes of the antenna. In response to receiving the optical signal, the first active filter node deactivates a corresponding radiating element of a plurality of radiating elements.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 21, 2015
    Applicant: AT&T Intellectual Property I, L.P.
    Inventor: Robert R. Miller, II
  • Patent number: 8952856
    Abstract: A transmission/reception element includes: a plurality of metal layers each disposed with space from another; and a switch for controlling electrical coupling between the metal layers. The switch includes a contact-point group including a plurality of contact-point pairs each disposed in parallel between each two of the metal layers, and a drive section mechanically driving the contact-point group for state change of each of the contact-point pairs between in-contact and no-contact.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: February 10, 2015
    Assignee: SonyCorporation
    Inventors: Akira Akiba, Koichi Ikeda
  • Patent number: 8923914
    Abstract: A re-reconfigurable built-in antenna of a portable terminal is provided. The antenna includes an antenna radiator having a feeding pad electrically connected to a feeding portion of a main board of the terminal and at least one ground pad disposed in a position different from that of the feeding pad for selectively establishing an electrical connection to a ground portion of the terminal, and a switching element, commonly connected to the at least one ground pad of the antenna radiator, for selectively establishing an electrical connection to the ground portion by a switching operation. The antenna radiator changes a shape of the antenna radiator by using the selective electrical connection of the ground portion so as to have various operational frequency bands and radiation properties.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: December 30, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-U Kim, Austin Kim, Dong-Hwan Kim, Jae-Ho Lee, Jung-Ho Park
  • Patent number: 8914031
    Abstract: Disclosed are a beamforming method and a beamforming apparatus for an adaptive antenna. A mobile terminal equipped with the adaptive antenna is initialized, a base station to transceive a signal with the mobile terminal is searched, beamforming is performed based on the searched base station, a reference position value of the mobile terminal is stored, and the beamforming of the antenna is adjusted if a sensing module in the mobile terminal detects position change of the mobile terminal based on a reference position. A changed position of the mobile terminal is stored as the reference position value, so that the position of the terminal is detected based on the reference position in real time, thereby simply and accurately performing the beamforming.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: December 16, 2014
    Assignee: LG Innotek Co., Ltd.
    Inventor: Jeong Hoon Cho
  • Patent number: 8842053
    Abstract: An electrically-shortened Yagi antenna includes a boom, a first electrically-shortened end element mounted on the boom, a second electrically-shortened end element mounted on the boom; and an electrically-shortened driven element mounted on the boom and electrically shortened less than the first and second electrically-shortened end elements.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: September 23, 2014
    Assignee: Fluidmotion, Inc.
    Inventors: Clayton B. Curtiss, Michael E. Mertel
  • Publication number: 20140145888
    Abstract: A tunable antenna is formed on a boom. First and a second opposed non-conductive support pole extend from a first end of the boom. Third and a fourth opposed non-conductive support pole extending from a second end of the boom. Each pole has a wire guide at its end. First and second spools are mounted near the first end of the boom. Third and fourth spools are mounted near the second end of the boom. First and second wires are spooled on the first and second spools. A third wire is spooled on the third spool and mechanically coupled to the first wire by a non-conductive cord, the first and third wires running through the first and third pole guides. A fourth wire is spooled on the fourth spool and mechanically coupled to the second wire by non-conductive cord, the second and fourth wires running through the second and fourth pole guides.
    Type: Application
    Filed: November 27, 2012
    Publication date: May 29, 2014
    Inventor: Michael Mertel
  • Patent number: 8730109
    Abstract: Radio transmitting and receiving slot antenna, comprising a transmitting and receiving portion, means for connection to a transmitting and/or receiving circuit, said transmitting and receiving portion being formed of two volumes of liquid delimiting a slot, and means to modify the shape of said volumes of liquid and to modify the width of the slot, said means to modify the shape of said volume of liquid using electrostatic forces, the liquid being electrically conductive, and a control unit controlling the means to deform the volumes of fluid.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: May 20, 2014
    Assignee: Commissariat a l'Energie Atomique
    Inventor: Ghislain Despesse
  • Patent number: 8610632
    Abstract: Techniques for adjusting one or more antenna parameters to optimize the performance of a wireless device are disclosed. In an embodiment, a variable antenna electrical length module is provided with a control signal for selecting a preferred antenna electrical length. Further techniques for accommodating multiple antennas are disclosed.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: December 17, 2013
    Assignee: Qualcomm Incorporated
    Inventors: Yang Zhang, Jack Steenstra, Ernest T. Ozaki, Jui-Yao Lin, Kirk S. Taylor, Liren Chen, Guilherme Luiz Karnas Hoefel
  • Publication number: 20130147671
    Abstract: An adjustable antenna system for transmission and/or reception of electromagnetic waves enables adjustment of the length of an antenna cable for adjustably tuning one or more operating parameters of the antenna. The antenna system can include a spindle frame that can support a first spool and a second spool that are rotatably mountable on the spindle frame. Wrapped around the first spool can be a length of antenna cable and wrapped around the second spool can be a length of non-conducting line. The distal ends of the cable and line can be connected so that as spools are selectively rotated independently or dependently, the relative lengths of the cable and line are changed. The antenna system can further include a transmission bus partially disposed along the spindle frame to establish communication between the antenna cable and a connector for connecting to a transmitter/receiver associated with the antenna system.
    Type: Application
    Filed: December 7, 2012
    Publication date: June 13, 2013
    Inventor: ROBERT F. SCHWEPPE
  • Patent number: 8422947
    Abstract: A communication device includes a communication circuit part, a transmission path for signals, a ground, a coupler electrode, and a resonance part. The coupler electrode includes an upper flat part as an electrode, a support, and a connecting portion. The support supports the upper flat part. Thus, the upper flat part faces the ground and is separately placed therefrom at a height only enough to ignore the wavelength of the signal, while having a flexible portion which is elastically deformable in the height direction. On the connecting portion, the other end of the support is connected to the transmission path. The resonance part enlarges a current flowing into the coupler electrode through the transmission path. A micro dipole is a line segment connecting between the center of accumulated electric charge in the coupler electrode and the center of mirror charge accumulated in the ground.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: April 16, 2013
    Inventor: Satoshi Konya
  • Publication number: 20120242550
    Abstract: Apparatus and method that includes providing a variable-parameter electrical component in a high-field environment and based on an electrical signal, automatically moving a movable portion of the electrical component in relation to another portion of the electrical component to vary at least one of its parameters. In some embodiments, the moving uses a mechanical movement device (e.g., a linear positioner, rotary motor, or pump). In some embodiments of the method, the electrical component has a variable inductance, capacitance, and/or resistance. Some embodiments include using a computer that controls the moving of the movable portion of the electrical component in order to vary an electrical parameter of the electrical component. Some embodiments include using a feedback signal to provide feedback control in order to adjust and/or maintain the electrical parameter.
    Type: Application
    Filed: March 8, 2010
    Publication date: September 27, 2012
    Inventors: Carl J. Snyder, John Thomas Vaughan, JR., Charles A. Lemaire
  • Publication number: 20120212382
    Abstract: Techniques for adjusting one or more antenna parameters to optimize the performance of a wireless device are disclosed. In an embodiment, a variable antenna electrical length module is provided with a control signal for selecting a preferred antenna electrical length. Further techniques for accommodating multiple antennas are disclosed.
    Type: Application
    Filed: May 1, 2012
    Publication date: August 23, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventors: Yang Zhang, Jack Steenstra, Ernest T. Ozaki, Jui-Yao Lin, Kirk S. Taylor, Liren Chen, Guilherme Luiz Karnas Hoefel
  • Patent number: 8144064
    Abstract: A narrow band, tunable antenna uses a series of small inductors wired in series to produce different resonant frequencies from a single antenna across a wide frequency spectrum. Radio Frequency (RF) switches are positioned in parallel with the inductors and are capable of shunting a selected inductor out of the antenna circuit thereby changing the electrical length of the antenna and consequently, the resonant frequency. The RF switch control circuitry is isolated from the RF current in the antenna.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: March 27, 2012
    Assignee: ATI Technologies ULC
    Inventor: Svetlan Milosevic
  • Publication number: 20110063177
    Abstract: An antenna coupled to a wireless communication device is comprised of a conductive component, such as a series of conductive elements, that forms a conductor if placed under a threshold force. The conductor is coupled to the wireless communication device so that the wireless communication device is capable of communicating at an operating frequency defined by the length and construction of the conductor. By communicating using the conductor as an antenna, the wireless communication device may provide an indication of force to an interrogation reader. Furthermore, a conductive support element, such as a tuning ring, may be used for communication as well as coupling the conductive component to the wireless communication device. Multiple conductive components may be coupled to the wireless communication device for communicating at multiple frequencies if placed under multiple threshold forces.
    Type: Application
    Filed: November 17, 2010
    Publication date: March 17, 2011
    Inventor: Ian J. Forster
  • Publication number: 20100330936
    Abstract: An exemplary multiband antenna includes an antenna module and a switch module electrically connected to the antenna module. The antenna module includes a first antenna member, a second antenna member, and a third antenna member, which are mounted on a main board. The antenna module is electrically connected or disconnected by operating the switch module to form different antenna structures for receiving different wireless signals.
    Type: Application
    Filed: November 30, 2009
    Publication date: December 30, 2010
    Applicant: CHI MEI COMMUNICATION SYSTEMS, INC.
    Inventors: TE-CHANG LIN, CHO-KANG HSU
  • Patent number: 7813449
    Abstract: An antenna system for receiving radio waves and for operation in conjunction with a remote controller that transmits control data including gain state data. The antenna system includes an antenna that receives the radio waves and outputs a radio frequency signal and a radio frequency amplifier coupled to receive and amplify the radio frequency signal to a gain level controlled through a gain control input. A remote control receiver receives the control data and a controller is coupled to the gain control input and the remote control receiver. The controller couples the gain state data to the gain control input, thereby remotely controlling the gain level of the radio frequency amplifier. A remotely controlled antenna rotor is also taught.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: October 12, 2010
    Assignee: Radio Shack, Corporation
    Inventor: Alan Man Lung Lam
  • Patent number: 7720511
    Abstract: The present invention determines optimal positions of a variable antenna using an artificial intelligence-based genetic algorithm (GA). The GA acquires a fitness value for an individual of a genetic algorithm population by updating positions of the antenna. The population improves through an evolutionary computational process using a fitness measure based on the signal strength. At the end of the process, the system positions the antenna to the best position found by the GA. Therefore, the final position gives exceptionally clear reception for a chosen received frequency.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: May 18, 2010
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Brian Hanley, Choong K Oh
  • Publication number: 20100060529
    Abstract: Handheld electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may include antenna structures. To accommodate manufacturing variations, the antenna structures and handheld electronic devices may be characterized by performing measurements such as antenna performance measurements. Appropriate antenna adjustments may be made during manufacturing of a handheld electronic device based on the characterizing measurements. An antenna may be formed using an inverted-F design in which an antenna flex circuit is mounted to a dielectric antenna support structure. Cavities in the support may be selectively filled with dielectric material and dielectric patches may be added to the antenna flex circuit to adjust the dielectric loading of the antenna. The length of a ground return path in the antenna may be adjusted by appropriate positioning of an electrical connector within the ground return path.
    Type: Application
    Filed: September 5, 2008
    Publication date: March 11, 2010
    Inventors: Robert W. Schlub, Dean F. Darnell, Robert J. Hill, Teodor Dabov, Hui Leng Lim
  • Publication number: 20090322632
    Abstract: A narrow band, tunable antenna uses a series of small inductors wired in series to produce different resonant frequencies from a single antenna across a wide frequency spectrum. Radio Frequency (RF) switches are positioned in parallel with the inductors and are capable of shunting a selected inductor out of the antenna circuit thereby changing the electrical length of the antenna and consequently, the resonant frequency. The RF switch control circuitry is isolated from the RF current in the antenna.
    Type: Application
    Filed: June 26, 2008
    Publication date: December 31, 2009
    Applicant: ATI TECHNOLOGIES ULC
    Inventor: Svetlan Milosevic
  • Patent number: 7637000
    Abstract: A method of fabricating an antenna includes the step of stamping an initial set of openings within a metal strip and then plating that metal strip on all exterior surfaces. Initial openings define portions of features of the completed antenna that require plating on all surfaces. Once the metal coil has been plated the metal strips are fed through a final stamping process that makes final cuts that correspond with the initially made openings. The final cuts are on surfaces that do not require plating on all of the exterior surfaces.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: December 29, 2009
    Assignee: Continental Automotive Systems US, Inc.
    Inventor: Jeffrey A. Clark
  • Publication number: 20090256761
    Abstract: A handheld device with switchable signal receiving modes includes a telescopic antenna, a telecommunication transceiver module, a satellite signal module, and a switch circuit. Upon receiving a switch signal, the switch circuit couples the telescopic antenna to the telecommunication transceiver module, and adjusts the telescopic antenna to a first length, so that the telecommunication transceiver module transmits and receives a signal of a first frequency, or the switch circuit adjusts the telescopic antenna to a second length, so that the telecommunication transceiver module transmits and receives a signal of a second frequency. Alternatively, the switch circuit couples the telescopic antenna to the satellite signal module, and adjusts the telescopic antenna to the second length, so that the satellite signal module receives a satellite signal.
    Type: Application
    Filed: April 3, 2009
    Publication date: October 15, 2009
    Inventor: Sea-Weng YOUNG
  • Patent number: 7522056
    Abstract: A badge, such as that used by police officers and other law enforcement officials, includes a badge body constructed and arranged to support one or more components of the badge, such as an officer's badge number, indicia indicating the organization with which the officer is affiliated, a pin or other arrangement by which to secure the badge to an object, and so on. The badge body may be made of metal, and an RFID device may be attached to the badge body. The RFID device may include a coil antenna and a processor in communication with the coil antenna arranged to function as an RFID transponder. At least one antenna-enhancing structure may be attached to the badge body and be adjacent the coil antenna so as to enhance an ability of the RFID device to communicate wirelessly with an RFID reader.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: April 21, 2009
    Assignee: V.H. Blackinton & Co., Inc.
    Inventor: Peter A. Roque
  • Patent number: 6201511
    Abstract: An antenna assembly includes a receiving antenna and a separate transmitting antenna with an isolation circuit disposed in between to thereby isolate the Tx and Rx signals and provide a sufficient amount of attenuation outside the desired frequency band. The dual antenna structure enables the elimination of a conventional duplexer for duplex operation. In this context, the arrangement minimizes occupied space on the PCB while reducing manufacturing costs.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: March 13, 2001
    Assignee: Ericsson Inc.
    Inventor: Hongxi Xue
  • Patent number: 5748146
    Abstract: A sidelobe reduction benefit in a two-way pattern is accomplished when each attern (transmit or receive) has the same character as traditionally designed, but they differ in polarization. When polarization mismatch is included in the antenna pattern characteristic, the opposite sense of polarization in the sidelobe results in cancellation of signals between transmit and receive and, therefore, a net polarization loss or sidelobe level reduction in the combined two-way pattern. Polarization mismatch is accomplished by designing a separation distance between the transmitting elements and the corresponding receiving elements of the array. Choice of separation distance results in locating the region of perfect polarization mismatch in any desired angular direction.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: May 5, 1998
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Carl E. Grove, Lisa K. Thielking Slaski
  • Patent number: 5694140
    Abstract: A non-squinting helical antenna is divided into segments separated by a coupler. This coupler is preferably a four port coupler which serves as a summation and difference power divider. Such a four port coupler allows the formation of a closed loop for controlling the steering angle of the antenna. The summation and difference signals between segments are monitored, and the ratio of these signals is used to determine and correct error in steering. The steering angle of the antenna can thus be maintained over a range of frequencies within a decibel of error.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: December 2, 1997
    Assignee: Westinghouse Electric Corporation
    Inventors: Timothy G. Waterman, Gary E. Evans
  • Patent number: 5666645
    Abstract: A data management and distribution system for an electronic program guide ("EPG") for television programs comprising an automated data collection subsystem, a manual entry and correction subsystem, a database validation subsystem, an edition generation subsystem, a configuration subsystem, and a status and control subsystem. The system may further comprise a feed generation subsystem if one or more of the EPG providers supported by the EPG distributor requires a live feed of data. The automated data collection subsystem collects EPG data from multiple sources in various formats, filters the data based on the needs of the EPG providers supported, and places the data in a centralized database in a form suitable to support the different environmental contexts of the EPG providers. The manual entry and correction subsystem permits the EPG distributor to make manual corrections, additions, and deletions to the data stored in the database.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: September 9, 1997
    Assignee: News America Publications, Inc.
    Inventors: William Thomas, David W. Gustafson, Dennis Tenney, Paul Darata
  • Patent number: 5436633
    Abstract: An adjustable antenna assembly for a portable telephone includes a tubular base removably attached to a portable telephone, a socket securely received in the tubular base and having an outer periphery which is threaded in an upper end thereof, a coil received in the socket with a lower end thereof electrically connected to the telephone for receiving and transmitting wireless signal waves to the telephone, a cap having a closed upper end and an open lower end, the cap further having a threaded inner periphery and being mounted around the threaded upper end of the socket and thus being movable relative to the socket along a longitudinal direction of the coil upon rotational movement thereof, and a compressing member mounted between an upper end of the coil and the upper end of the cap such that a pitch of the coil is adjustable upon adjustment of relative longitudinal position between the cap and the socket.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: July 25, 1995
    Inventor: An-Shuenn Liu
  • Patent number: 5274393
    Abstract: A VHF radio (10) which includes an adjustable antenna (20) formed from a component (28) shaped like an open helical compression spring which engages and can be screwed into a metal supporting collar (40) for tuning the antenna (20). An elongated plastic or rubber cylindrical member (30) is connected to the metal collar and surrounds at least a portion of the helical member (28). An end cap (32) is provided for closing the other end of the cylindrical member (30).
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: December 28, 1993
    Assignee: Allied-Signal Inc.
    Inventor: Kenneth R. Scott
  • Patent number: 5028932
    Abstract: A flexible antenna which operates to control both the reactance as well as the resistance of the antenna. A motorized pulley system attached between two supports is utilized to control the effectrive length of the wire as well as the height of the antenna above ground. The antenna includes a flat base portion suspended between the supports and leg portions extending from the base to the apex of the triangle close to the ground. The total length of the antenna as well as the height of the base portion above the ground is dependent upon the particular frequency which is to be transmitted or received.
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: July 2, 1991
    Inventor: Ivan G. Boor
  • Patent number: 4803493
    Abstract: A mobile antenna circuit for resonant transmitting from an RF signal source may comprise: an antenna having a base and at least first and second conductive sections one of which is extendable and retractable to lengthen and shorten the antenna; a motor operatively connected to one of the conductive sections for extending and retracting the antenna in response to control signals thereto; an impedance matching circuit coupling the RF signal source to the base of the antenna for matching impedance thereof at a specified frequency; and control components connected to the motor to produce control signals for extending and retracting the antenna section so as to resonantly tune the antenna at a specified frequency. The circuit may include a phase angle detector connected between the RF signal source and the impedance matching circuit for developing a voltage differential being fed to the control components for producing the control signals for extending and retracting the antenna section.
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: February 7, 1989
    Inventor: Wayne L. Jamison
  • Patent number: 4259672
    Abstract: A vertical antenna which is omnidirectional and includes completely automatic band switching for the amateur radio frequencies of, eighty/seventy-five meters, forty meters, twenty meters, fifteen meters, and ten meters. The vertical antenna has a low angle of radiation and a low standing wave ratio on all frequencies which provides for direct coaxial cable transmission line feed. The eighty-meter and forty-meter resonator capacitor sections provide inductive reactance for operation on eighty/seventy five meters and forty meters while permitting simultaneous resonance on each of the three higher frequencies of twenty, fifteen, and ten meters. The entire radiator length of the vertical antenna is active on all frequencies except for fifteen meters where the upper portion of the antenna is decoupled above an end of a fifteen-meter quarter-wave decoupling stub in a first embodiment. The entire radiator length of the vertical antenna is active on all frequencies in a second embodiment.
    Type: Grant
    Filed: September 18, 1979
    Date of Patent: March 31, 1981
    Assignee: Butternut Electronics
    Inventor: Donald R. Newcomb
  • Patent number: 4222053
    Abstract: A vertical antenna which is omnidirectional and includes completely automatic band switching for the amateur radio frequencies of one hundred and sixty meters, eighty-seventyfive meters, forty meters, twenty meters, fifteen meters, and ten meters. The vertical antenna has a low angle of radiation and a low standing wave ratio on all frequencies which permits direct coaxial cable transmission line feed. The eighty meter and forty meter resonator capacitor sections provide inductive reactance for operation on eighty-seventyfive meters and forty meters while permitting simultaneous resonance on each of the three higher frequencies of twenty, fifteen, and ten meters. The entire radiator length of the vertical antenna is active on all frequencies except for fifteen meters where the upper portion of the antenna is trapped out by a fifteen meter decoupling trap.
    Type: Grant
    Filed: November 3, 1978
    Date of Patent: September 9, 1980
    Assignee: Butternut Electronics Co.
    Inventor: Donald R. Newcomb
  • Patent number: 4117495
    Abstract: An extensible antenna assembly defined by a strip wound into a coil and extensible out of the coil through a guide for forming the strip into an elongated tubular length. In two embodiments the strip is made of a metal whereby the tubular length establishes the antenna for radiating and receiving radio frequency energy and the coiled or wound coil portion defines a coil integrally coupled and electrically continuous with the tubular portion to define a variable inductive reactance for automatically maintaining the antenna resonant to a predetermined frequency in correlation with and responsive to the extended position of the antenna. An insulating means, comprising a strip in the first embodiment and a conical spindle in the second embodiment, insulates the turns of the strip defining the coil and is configured to change the inductance of the coil non-linearly in response to linear movement of the antenna.
    Type: Grant
    Filed: March 1, 1977
    Date of Patent: September 26, 1978
    Inventor: Peter A. Hochstein
  • Patent number: 4104639
    Abstract: A radio frequency antenna comprising a shaft fabricated from dielectric material, and first and second conducting means disposed on the exterior surface of the shaft, the conducting means including linear conductors located on opposite sides of one portion of the shaft and intertwined insulated coils on a second portion of the shaft connected to the respective linear conductors. Tuning members can be connected to the conducting means for selectively changing the resonant frequency of the antenna.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: August 1, 1978
    Assignee: True Temper Corporation
    Inventor: Jerome J. Muchiarone