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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

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:
OSTI Identifier:
1372651
Assignee:
CALABAZAS CREEK RESEARCH, INC. CHO
Patent Number(s):
9,715,988
Application Number:
14/624,245
Contract Number:
FG02-05ER84181
Resource Relation:
Patent File Date: 2015 Feb 17
Research Org:
CALABAZAS CREEK RESEARCH, INC. San Mateo, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

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