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Technology advances have made possible the visualization of electron temperature profiles and fluctuations inside the core of high temperature plasmas via a two-dimensional passive millimeter wave imaging system. The electron cyclotron emission imaging (ECEI) system concept and configuration are briefly described. Advanced technologies such as frequency selective surfaces band-stop filter, planar...
Dual dipole antennas have been developed in the frequency range of 33-50 GHz and 105-135 GHz for use as imaging array elements in an electron cyclotron emission imaging (ECEI) and microwave imaging reflectometry (MIR) plasma diagnostic system respectively. A wideband balun with less than 3 dB back to back insertion loss was achieved in the frequency range of 1.7 GHz-19.8 GHz (1:11.7) for convert IF...
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