@article{oai:nifs-repository.repo.nii.ac.jp:00011604,
 author = {TOKUZAWA,  Tokihiko and NASU, Tatsuhiro and INAGAKI,  Shigeru and MOON, Chanho and IDO,  Takeshi and IDEI,  Hiroshi and EJIRI,  Akira and IMAZAWA, Ryota and YOSHIDA, M. and OYAMA, N. and TANAKA,  Kenji and IDA,  Katsumi},
 issue = {11},
 journal = {Review of Scientific Instruments},
 month = {Nov},
 note = {0000-0001-5473-2109, Measuring the time variation of the wavenumber spectrum of turbulence is important for understanding the characteristics of high-temperature plasmas, and the application of a Doppler reflectometer with simultaneous multi-frequency sources is expected. To implement this diagnostic in future fusion devices, the use of a phased array antenna (PAA) that can scan microwave beams without moving antennas is recommended. Since the frequency-scanning waveguide leaky-wave antenna-type PAA has a complex structure, we have investigated its characteristics by modeling it with 3D metal powder additive manufacturing (AM). First, a single waveguide is fabricated to understand the characteristics of 3D AM techniques, and it is clear that there are differences in performance depending on the direction of manufacture and surface treatment. Then, a PAA is made, and it is confirmed that the beam can be emitted in any direction by frequency scanning. The plasma flow velocity can be measured by applying the 3D manufacturing PAA to plasma measurement.},
 title = {3D metal powder additive manufacturing phased array antenna for multichannel Doppler reflectometer},
 volume = {93},
 year = {2022}
}