Gyrotron whispering gallery mode coupler with a mode conversion reflector for exciting a circular symmetric uniform phase RF beam in a corrugated waveguide

Neilson, Jeffrey M.

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Title: Gyrotron whispering gallery mode coupler with a mode conversion reflector for exciting a circular symmetric uniform phase RF beam in a corrugated waveguide

Abstract

A cylindrical waveguide with a mode converter transforms a whispering gallery mode from a gyrotron cylindrical waveguide with a helical cut launch edge to a quasi-Gaussian beam suitable for conveyance through a corrugated waveguide. This quasi-Gaussian beam is radiated away from the waveguide using a spiral cut launch edge, which is in close proximity to a first mode converting reflector. The first mode converting reflector is coupled to a second mode converting reflector which provides an output free-space HE11 mode wave suitable for direct coupling into a corrugated waveguide. The radiated beam produced at the output of the second mode converting reflector is substantially circular.

Inventors:: Neilson, Jeffrey M.

Issue Date:: Tue Jul 25 00:00:00 EDT 2017

Research Org.:: CALABAZAS CREEK RESEARCH, INC. San Mateo, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1372651

Patent Number(s):: 9715988

Application Number:: 14/624,245

Assignee:: CALABAZAS CREEK RESEARCH, INC.

Patent Classifications (CPCs):: H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01P - WAVEGUIDES

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J23/40 - to or from the interaction circuit
H01J25/025 - {with an electron stream following a helical path}

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01P - WAVEGUIDES
H01P1/16 - for mode selection, e.g. mode suppression or mode promotion
H01P5/024 - {between hollow waveguides}

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DOE Contract Number:: FG02-05ER84181

Resource Type:: Patent

Resource Relation:: Patent File Date: 2015 Feb 17

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats


                    Neilson, Jeffrey M. Gyrotron whispering gallery mode coupler with a mode conversion reflector for exciting a circular symmetric uniform phase RF beam in a corrugated waveguide.  United States: N. p., 2017. 
        Web.

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                    Neilson, Jeffrey M. Gyrotron whispering gallery mode coupler with a mode conversion reflector for exciting a circular symmetric uniform phase RF beam in a corrugated waveguide.  United States.

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                    Neilson, Jeffrey M. Tue .  
        "Gyrotron whispering gallery mode coupler with a mode conversion reflector for exciting a circular symmetric uniform phase RF beam in a corrugated waveguide".  United States.  https://www.osti.gov/servlets/purl/1372651.

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@article{osti_1372651,

  title        = {Gyrotron whispering gallery mode coupler with a mode conversion reflector for exciting a circular symmetric uniform phase RF beam in a corrugated waveguide},

  author       = {Neilson, Jeffrey M.},

  abstractNote = {A cylindrical waveguide with a mode converter transforms a whispering gallery mode from a gyrotron cylindrical waveguide with a helical cut launch edge to a quasi-Gaussian beam suitable for conveyance through a corrugated waveguide. This quasi-Gaussian beam is radiated away from the waveguide using a spiral cut launch edge, which is in close proximity to a first mode converting reflector. The first mode converting reflector is coupled to a second mode converting reflector which provides an output free-space HE11 mode wave suitable for direct coupling into a corrugated waveguide. The radiated beam produced at the output of the second mode converting reflector is substantially circular.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Jul 25 00:00:00 EDT 2017},

  month        = {Tue Jul 25 00:00:00 EDT 2017}

}

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Works referenced in this record:

Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide
patent, May 1991

Ives, Robert Lawrence; Jory, Howard R.; LaRue, Albert D.
US Patent Document 5,015,914
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5015914

Compact waveguide converter apparatus
patent, July 1991

Moeller, Charles P.
US Patent Document 5,030,929
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5030929

Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam
patent, May 1992

Stallard, Barry W.; Makowski, Michael; Byers, Jack
US Patent Document 5,115,482
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5115482

Method of converting transverse electrical modes and a helically outlined aperture antenna for implementing the method
patent, November 1993

Mobius, Arnold; Thumm, Manfred
US Patent Document 5,266,962
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5266962

Coupler for coupling gyrotron whispering gallery mode RF into HE11 waveguide
patent, February 2015

Neilson, Jeffrey M.
US Patent Document 8,963,424
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8963424

Mode converter and gyrotron tube provided with mode converter for converting mode of millimeter waves
patent-application, February 2002

Sakamoto, Keishi; Kasugai, Atsushi; Mitsunaka, Yoshika
US Patent Document 09/864883; 20020021095
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20020021095

Optical coupling for whispering-gallery-mode resonators via waveguide gratings
patent-application, July 2005

Ilchenko, Vladimir
US Patent Document 10/886009; 20050147355
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20050147355

Continuous-Wave Operation of a Frequency-Tunable 460-GHz Second-Harmonic Gyrotron for Enhanced Nuclear Magnetic Resonance
journal, June 2010

Torrezan, Antonio C.; Han, Seong-Tae; Mastovsky, Ivan
IEEE Transactions on Plasma Science, Vol. 38, Issue 6, p. 1150-1159
https://doi.org/10.1109/TPS.2010.2046617

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A cylindrical waveguide with a mode converter transforms a whispering gallery mode from a gyrotron cylindrical waveguide with a helical cut launch edge to a quasi-Gaussian beam suitable for conveyance through a corrugated waveguide. This quasi-Gaussian beam is radiated away from the waveguide using a spiral cut launch edge, which is in close proximity to a first mode converting reflector. The first mode converting reflector is coupled to a second mode converting reflector which provides an output free-space HE11 mode wave suitable for direct coupling into a corrugated waveguide. The radiated beam produced at the output of the second modemore » « less
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Similar Records

Title: Gyrotron whispering gallery mode coupler with a mode conversion reflector for exciting a circular symmetric uniform phase RF beam in a corrugated waveguide

Abstract

Citation Formats

Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide patent, May 1991

Compact waveguide converter apparatus patent, July 1991

Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam patent, May 1992

Method of converting transverse electrical modes and a helically outlined aperture antenna for implementing the method patent, November 1993

Coupler for coupling gyrotron whispering gallery mode RF into HE11 waveguide patent, February 2015

Mode converter and gyrotron tube provided with mode converter for converting mode of millimeter waves patent-application, February 2002

Optical coupling for whispering-gallery-mode resonators via waveguide gratings patent-application, July 2005

Continuous-Wave Operation of a Frequency-Tunable 460-GHz Second-Harmonic Gyrotron for Enhanced Nuclear Magnetic Resonance journal, June 2010

Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide
patent, May 1991

Compact waveguide converter apparatus
patent, July 1991

Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam
patent, May 1992

Method of converting transverse electrical modes and a helically outlined aperture antenna for implementing the method
patent, November 1993

Coupler for coupling gyrotron whispering gallery mode RF into HE11 waveguide
patent, February 2015

Mode converter and gyrotron tube provided with mode converter for converting mode of millimeter waves
patent-application, February 2002

Optical coupling for whispering-gallery-mode resonators via waveguide gratings
patent-application, July 2005

Continuous-Wave Operation of a Frequency-Tunable 460-GHz Second-Harmonic Gyrotron for Enhanced Nuclear Magnetic Resonance
journal, June 2010