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