Beam waveguide reflector with integrated direction-finding antenna for in-situ alignment

W. Kasparek, H. Idei, S. Kubo, T. Notake

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

An in-situ alignment system for beam waveguides based on an interferometric direction-finding antenna was investigated numerically and experimentally. The system consists of a reflector with four off-central positioned waveguide couplers in two directions. By nulling the difference of the power signals as well as the mixing signal from each coupler pair, spatial and angular alignments of a beam impinging on the mirror can be performed. In this paper, the characteristics of such a mirror are presented, and the design of a prototype intended for use in an ECH transmission line at LHD is described. Low-power as well as high-power tests at a frequency of 82.7 GHz were carried out, and the results are discussed. The device shows a high performance in agreement with theory.

Original languageEnglish
Pages (from-to)451-472
Number of pages22
JournalInternational Journal of Infrared and Millimeter Waves
Volume24
Issue number4
DOIs
Publication statusPublished - Apr 1 2003
Externally publishedYes

Fingerprint

beam waveguides
direction finding
couplers
reflectors
Mirrors
Waveguides
antennas
alignment
signal mixing
Waveguide couplers
Antennas
mirrors
transmission lines
Electric lines
prototypes
waveguides

All Science Journal Classification (ASJC) codes

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering

Cite this

Beam waveguide reflector with integrated direction-finding antenna for in-situ alignment. / Kasparek, W.; Idei, H.; Kubo, S.; Notake, T.

In: International Journal of Infrared and Millimeter Waves, Vol. 24, No. 4, 01.04.2003, p. 451-472.

Research output: Contribution to journalArticle

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