Experiment on the Focusing of High power Millimeter-Wave Beam(Physics, Process, Instrument & Measurement)
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- MIYAKE Shoji
- Osaka University
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- WADA Osami
- Okayam University
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- NAKAJIMA Masamitsu
- Kyoto Universtiy
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- ARATA Yoshiaki
- Kinki University
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Abstract
Focusing of millimeter-wave radiation from a high power 60GHz gyrotron is studied using a Vlasov-Nakajima type quasi-optical antenna system. Fine focusing in the E-plane of the wave with an elliptic reflector gives a sheet beam of 10mm (FWHM) in thickness even at a high power input of about 100kW. Addition of a parabolic reflector brings a focused beam of about 10mm in diameter in FWHM and an energy beam wit a density higher than 100kW/cm^2 is obtained. The beam power distribution after reflection from the elliptic mirror is compared with calculated one and a good agreement is obtained.
Journal
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- Transactions of JWRI
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Transactions of JWRI 18 (2), 169-174, 1989-12
Osaka University