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Title: Coupler for coupling gyrotron whispering gallery mode RF into HE11 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:
Issue Date:
Research Org.:
Calabazas Creek Research, Inc., San Mateo, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1170738
Patent Number(s):
8,963,424
Application Number:
13/016,995
Assignee:
Calabazas Creek Research, Inc. (San Mateo, CA)
DOE Contract Number:  
FG02-05ER84181
Resource Type:
Patent
Resource Relation:
Patent File Date: 2011 Jan 29
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Neilson, Jeffrey M. Coupler for coupling gyrotron whispering gallery mode RF into HE11 waveguide. United States: N. p., 2015. Web.
Neilson, Jeffrey M. Coupler for coupling gyrotron whispering gallery mode RF into HE11 waveguide. United States.
Neilson, Jeffrey M. Tue . "Coupler for coupling gyrotron whispering gallery mode RF into HE11 waveguide". United States. https://www.osti.gov/servlets/purl/1170738.
@article{osti_1170738,
title = {Coupler for coupling gyrotron whispering gallery mode RF into HE11 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 = {2015},
month = {2}
}

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Works referenced in this record:

110 GHz gyrotron with a built-in high-efficiency converter
journal, May 1992

  • Denisov, G. G.; Kuftin, A. N.; Malygin, V. I.
  • International Journal of Electronics, Vol. 72, Issue 5-6
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A shaped-reflector high-power converter for a whispering-gallery mode gyrotron output
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Gyrotron beam coupling method into corrugated waveguide
conference, September 2009

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  • 2009 34th International Conference on Infrared, Millimeter, and Terahertz Waves (IORMMW-THz 2009)
  • DOI: 10.1109/ICIMW.2009.5325674

Surface integral equation analysis of quasi-optical launchers
journal, June 2002


Optimization of Quasi-Optical Launchers for Multifrequency Gyrotrons
journal, December 2007