| 抄録 |
（和） |
Dielectric loading effect of open-end spiral antenna for wireless power transfer for the aim of miniaturization of antenna is discussed. As an antenna type, wire-winded model, tape-winded model and dielectric loaded tape model are considered. Additionally, effect of winding direction of transmitting and receiving antenna is also considered. At first, resonant frequency is examined. We found that the tape-winded model and the dielectric loaded tape model has 20.2% and 35.1% smaller resonant frequency compared to the wire model, respectively. Next, co-directional and contra-directional arrangements for each antenna model are considered. Numerical simulation demonstrated that the contra-directional arrangement has 229.9%, 206.4%, and 198.5% larger coupling coefficient than the co-directional arrangement for the wire-winded model, tape-winded model and dielectric loaded tape model, respectively. Finally, far-field radiation power, which is undesired emission for wireless power transfer, is investigated. The contra-directional arrangement has 10.31dB, 12.58dB, and 8.47dB smaller emission than the contra-directional model for the wire-winded model, tape-winded model and dielectric loaded tape model, respectively. |