Development of microwave imaging reflectometry in large helical device.
Three key devices of the microwave imaging reflectometry (MIR) are under development in large helical device (LHD). The 2-D mixer array is developed by stacking the one-dimensional array of the planar Yagi-Uda antenna. The new type of the bandpass filter bank is modified to match the requirement of the MIR. The low-cost quadrature demodulator is also developed for the phase detection system. By using the low-price commercial wireless devices, the development cost becomes much lower than the expensive waveguide system. These devices enable the development of 2-D/3-D microwave imaging system for the plasma diagnostics and industrial applications.
Yamaguchi
S
S
Faculty of Engineering Science, Kansai University, Osaka 564-8680, Japan.
Nagayama
Y
Y
Kuwahara
D
D
Yoshinaga
T
T
Shi
Z B
ZB
Kogi
Y
Y
Mase
A
A