Microwave wireless power transmission (MPT) are the key technology of solar power satellite and aircraft in near space, it could also be applied in charging the wireless sensors and harvesting the ambient electromagnetic power. After comparing the microstrip and coplanar waveguide rectenna element and arrays, the demands on receiving antennas and rectifying circuits are summarized. The topological models and truncated Gauss aperture level distribution of the transmitting antenna are analyzed to obtain the maximum microwave beam capture efficiency. Based on above key technique, a C-band MPT system is designed and 35% dc-dc (direct current-direct current) efficiency is evaluated. The remaining problems and the development of MPT technology are discussed at the end.
YANG Xue-xia, ZHOU Hua-wei, ZHOU Yong-jin, MEI Huan
. Research Progress in Microwave Wireless Power Transmission Technologies and System Efficiency Evaluation[J]. Journal of Shanghai University, 2014
, 20(5)
: 541
-549
.
DOI: 10.3969/j.issn.1007-2861.2014.04.003
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