位相検波器を内蔵したガン発振器を用いたレ-タ型マイクロ波ホログラフィシステム

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タイトル別名
  • A Redar-Type Microwave Holography System Using a Gunn Oscillator with Built in Phase Detectors
  • イソウ ケンパキ オ ナイゾウシタ ガン ハッシンキ オ モチイタ レータガタ

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This paper describes a radar-type microwave holography system making use of the Gunn-device with a built-in detector manufactured as a Doppler sensor. In order to make the detector phase-sensitive an additional detector of the same type was furnished in the waveguide mount at the distance 3λg/8 apart from the built-in detector. While the device was scanned across the plane (64x64cm2)parallel to a two-dimensional object, 64x64 data were taken and put into a microcomputer where the data were processed and the images were reconstructed. The scanning system was controlled by the same computer. Despite of the possible deteriorative effects due to an insufficient frequency stability of Gunn oscillator and the interference between oscillator and detectors, reconstructed images as good as ones by a similar system using Klystron oscillator and object scanning were found to be obtained. Because of the compactness and flexibility of the Doppler sensor for holography use, applications of the modified Gunn sensor to a three-dimensional holography system is now in progress.

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