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Proceedings Paper

Quasi-optical conversion of the output from a whispering-gallery-mode gyrotron to a free-space beam with arbitrary power and phase distributions across both transverse dimensions of the beam
Author(s): J. A. Lorbeck
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Paper Abstract

A reflector-antenna synthesis procedure based on the principles of geometrical optics (GO) will be applied to the design of a quasi-optical converter which is used to transform the output of the whispering-gallery-mode (WGM) gyrotron to a freespace beam. The amplitude and phase distributions across both transverse dimensions of the free-space beam are specified as design parameters. The exact reflector surfaces which yield the desired output-beam characteristics are determined self consistently as the solutions of a system of first-order partial differential equations which we solve by progressive integration across the face of the reflectors. The synthesis procedure is anticipated to improve the output-beam characteristics of previous Vlasov-type converter designs where the power distribution could be manipulated in only one dimension across the beam which results in relatively poor free-space propagation charasteristics and reduced coupling efficiency into guided wave systems.

Paper Details

Date Published: 1 December 1990
PDF: 3 pages
Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 151429 (1 December 1990); doi: 10.1117/12.2301491
Show Author Affiliations
J. A. Lorbeck, Univ. of Wisconsin (United States)


Published in SPIE Proceedings Vol. 1514:
15th International Conference on Infrared and Millimeter Waves
Richard J. Temkin, Editor(s)

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