Design of a Millimeter-Wave Concentrator for Beam Reception in High-Power Wireless Power Transfer

作者：Fukunari Masafumi^*; Wongsuryrat Nat; Yamaguchi Toshikazu; Nakamura Yusuke; Komurasaki Kimiya; Koizumi Hiroyuki

来源：Journal of Infrared Millimeter and Terahertz Waves, 2017, 38(2): 176-190.

DOI：10.1007/s10762-016-0327-0

• Beamed energy propulsion
• Millimeter-wave
• Microwave optics
• Microwave rocket
• Concentrator

This study examined the performance of a developed taper-tube concentrator for 94-GHz millimeter-wave beam reception during wireless power transfer. The received energy is converted into kinetic energy of a working gas in the tube to drive an engine or thruster. The concentrator, which is assumed to have mirror reflection of millimeter waves in it, is designed to be shorter than conventional tapered waveguides of millimeter waves. A dimensionless design law of a concentrator is proposed based on geometric optics theory. Because the applicability of geometric optics theory is unclear, the ratio of its bore diameter to its wavelength was set as small compared to those in other possible applications. Then, the discrepancy between the designed and measured power reception was examined. Results show that the maximum discrepancy was as low as 7 % for the bore-to-wavelength ratio of 20 at the narrow end of the concentrator.

• 出版日期2017-2