Gyrotron whispering gallery mode coupler with a mode conversion reflector for exciting a circular symmetric uniform phase RF beam in a corrugated waveguide
Patent
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OSTI ID:1372651
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.
- Research Organization:
- CALABAZAS CREEK RESEARCH, INC. San Mateo, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-05ER84181
- Assignee:
- CALABAZAS CREEK RESEARCH, INC.
- Patent Number(s):
- 9,715,988
- Application Number:
- 14/624,245
- OSTI ID:
- 1372651
- Country of Publication:
- United States
- Language:
- English
Continuous-Wave Operation of a Frequency-Tunable 460-GHz Second-Harmonic Gyrotron for Enhanced Nuclear Magnetic Resonance
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journal | June 2010 |
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