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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:
Publication Date:
Research Org.:
CALABAZAS CREEK RESEARCH, INC. San Mateo, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1372651
Patent Number(s):
9,715,988
Application Number:
14/624,245
Assignee:
CALABAZAS CREEK RESEARCH, INC. CHO
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.
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.
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. doi:. https://www.osti.gov/servlets/purl/1372651.
@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:

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
  • DOI: 10.1109/TPS.2010.2046617