GB1128881A - Laser beam antenna - Google Patents

Laser beam antenna

Info

Publication number
GB1128881A
GB1128881A GB2122/67A GB212267A GB1128881A GB 1128881 A GB1128881 A GB 1128881A GB 2122/67 A GB2122/67 A GB 2122/67A GB 212267 A GB212267 A GB 212267A GB 1128881 A GB1128881 A GB 1128881A
Authority
GB
United Kingdom
Prior art keywords
laser
operated
pulsing
motor
column
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2122/67A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1128881A publication Critical patent/GB1128881A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/364—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
    • H01Q1/366—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor using an ionized gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/0007—Applications not otherwise provided for

Abstract

1,128,881. Aerials. INTERNATIONAL STANDARD ELECTRIC CORP. 16 Jan., 1967 [20 Jan., 1966], No. 2122/67. Heading H4A. [Also in Division H1] In a laser beam aerial a high power laser 1 is coupled to a pulsing means 3. The laser beam is passed through a variable focusing means 2 which is also coupled to the pulsing means 3, so that its focal length is changed in synchronization with the pulsing of the laser. The beam is focused successively at spaced points such as 6, 7, 8 and produces a column of ionized air extending to a predetermined height, which is used as an aerial for a source 4 by means of an electrode 5 connected thereto and immersed in the base of said beam. A ruby or neodymium-doped laser may be used and the focusing means may comprise a fixed lens (10), Fig. 2 (not shown); associated with a movable lens (9) operated by a motor (14) through a rack-and-pinion gearing (11), (12). The pulser (3) controls the motor through a timing means (15), which determines the amount by which the focal distance is changed between pulses. A counter (16) operates a reversing means (17) after a predetermined number of pulses (corresponding to the required height of the ionized air column) and controls the timing means so that the focal distance is returned to its base value, when the cycle recommences. In an alternative arrangement, two lasers (22), (23), Fig. 4 (not shown), with variable focusing means (24), (25) are operated by a common pulser (26). Each variable focusing means has a pivot (37), Fig. 5 (not shown), and is given an arcuate motion synchronized with the extension of its movable lens by means of a rack-andpinion gearing (38), (39) operated by a motor (40). In this way, both lasers are focused together on a succession of points (27), (28), (29), (30), Fig. 4, to provide an ionized column of air. Auxiliary means may be provided to aid ionization such as, the ejection of air which has been subjected to a high tension discharge (Fig. 6, not shown), or the use of ultra-violet light rays or of a beam of microwave energy.
GB2122/67A 1966-01-20 1967-01-16 Laser beam antenna Expired GB1128881A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US521978A US3404403A (en) 1966-01-20 1966-01-20 Laser beam antenna

Publications (1)

Publication Number Publication Date
GB1128881A true GB1128881A (en) 1968-10-02

Family

ID=24078917

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2122/67A Expired GB1128881A (en) 1966-01-20 1967-01-16 Laser beam antenna

Country Status (3)

Country Link
US (1) US3404403A (en)
FR (1) FR1508683A (en)
GB (1) GB1128881A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897207A1 (en) * 2006-02-07 2007-08-10 Thales Sa DEVICE FOR COUPLING BETWEEN A PLASMA ANTENNA AND A POWER SIGNAL GENERATOR

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US3775638A (en) * 1972-03-27 1973-11-27 Versar Inc Establishing highly conductive path in gas by thermal guidance of discharge
US4440714A (en) * 1981-01-29 1984-04-03 The United States Of America As Represented By The United States Department Of Energy Inertial confinement fusion method producing line source radiation fluence
US4879764A (en) * 1987-05-28 1989-11-07 Laser Communications, Inc. Apparatus and method for alignment of fixed communication laser stations
US4764983A (en) * 1987-06-15 1988-08-16 Laser Communications, Inc. Communication laser alignment assembly
US5157555A (en) * 1991-12-04 1992-10-20 General Electric Company Apparatus for adjustable correction of spherical aberration
US5594456A (en) * 1994-09-07 1997-01-14 Patriot Scientific Corporation Gas tube RF antenna
US5990837A (en) * 1994-09-07 1999-11-23 Asi Rugged gas tube RF cellular antenna
US6624719B1 (en) 2000-04-05 2003-09-23 Asi Technology Corporation Reconfigurable electromagnetic waveguide
US6812895B2 (en) 2000-04-05 2004-11-02 Markland Technologies, Inc. Reconfigurable electromagnetic plasma waveguide used as a phase shifter and a horn antenna
US6369763B1 (en) 2000-04-05 2002-04-09 Asi Technology Corporation Reconfigurable plasma antenna
US7648100B2 (en) 2000-05-31 2010-01-19 Kevin Kremeyer Shock wave modification method and system
US6842146B2 (en) 2002-02-25 2005-01-11 Markland Technologies, Inc. Plasma filter antenna system
US6876330B2 (en) * 2002-07-17 2005-04-05 Markland Technologies, Inc. Reconfigurable antennas
US6710746B1 (en) 2002-09-30 2004-03-23 Markland Technologies, Inc. Antenna having reconfigurable length
US7903698B1 (en) 2003-08-14 2011-03-08 Applied Energetics, Inc Controlled optical filament generation and energy propagation
US7482981B2 (en) * 2004-07-29 2009-01-27 Interdigital Technology Corporation Corona wind antennas and related methods
US8344338B2 (en) 2005-05-09 2013-01-01 Applied Energetics, Inc Systems and methods for enhancing electrical discharge
WO2009025803A1 (en) 2007-08-20 2009-02-26 Kevin Kremeyer Energy-deposition systems, equipment and methods for modifying and controlling shock waves and supersonic flow
FR2980992B1 (en) 2011-10-05 2013-11-29 Centre Nat Rech Scient SYSTEM FOR TRANSFERRING ELECTRIC ENERGY IN THERMAL ENERGY
US10669653B2 (en) 2015-06-18 2020-06-02 Kevin Kremeyer Directed energy deposition to facilitate high speed applications
WO2017115075A1 (en) * 2015-12-31 2017-07-06 Daqri Holographics Ltd Dynamic holography system for electromagnetic wave propagation
US11024950B2 (en) 2018-11-30 2021-06-01 United States Of America As Represented By The Secretary Of The Navy Wideband laser-induced plasma filament antenna with modulated conductivity

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1309031A (en) * 1919-07-08 hettinger
US1687792A (en) * 1922-10-28 1928-10-16 Benton B Hale Radiocommunication
US2760055A (en) * 1952-08-20 1956-08-21 Western Electric Co Antenna of ionized air

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897207A1 (en) * 2006-02-07 2007-08-10 Thales Sa DEVICE FOR COUPLING BETWEEN A PLASMA ANTENNA AND A POWER SIGNAL GENERATOR
WO2007090850A1 (en) * 2006-02-07 2007-08-16 Thales Device for coupling between a plasma antenna and a power signal generator
US7965241B2 (en) 2006-02-07 2011-06-21 Thales Device for coupling between a plasma antenna and a power signal generator

Also Published As

Publication number Publication date
FR1508683A (en) 1968-01-05
US3404403A (en) 1968-10-01

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