Imaging system for low-density plasma by heterodyne interferometer with fan beam microwave

A microwave imaging system based on a heterodyne interferometer has been developed to measure the spatial distribution of the plasma density without introducing any direct disturbance to the plasma by employing a diode array scattering technique. The imaging system with the use of a fan beam microwa...

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Bibliographic Details
Published in:Review of scientific instruments 2002-12, Vol.73 (12), p.4229-4231
Main Authors: Ito, H., Yugami, N., Nishida, Y., Sakai, W.
Format: Article
Language:English
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Summary:A microwave imaging system based on a heterodyne interferometer has been developed to measure the spatial distribution of the plasma density without introducing any direct disturbance to the plasma by employing a diode array scattering technique. The imaging system with the use of a fan beam microwave for a radar system demonstrates the principle of the technique by placing finite-size dielectric phantoms instead of the plasma between the horn antenna and the diode antenna array. Experimental results show that very good image of the objects can be reconstructed and the system is equivalent to popularly known multichannel imaging system. As a result, it is possible to make simple, low-cost, and compact microwave interferometer for measuring the spatial distribution of the plasma density.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1516833