| 講演抄録/キーワード |
| 講演名 |
2026-03-02 13:15
異なる媒質境界においた半波長ダイポールの電磁界分布の過渡応答 ○菊川優希・白石迅人・丸山珠美(広島工大)・大宮 学(北大) WPT2025-64 |
| 抄録 |
(和) |
比誘電率の大きな媒質中における電磁波の伝搬速度は、光速を比誘電率の平方根で割った速度となる.このような媒質と空中の境界付近に,送電用アンテナを設置した場合,反射の影響も生じるため,どの経路を通る電磁界が最も早く受電用アンテナに到達するかは興味深い.しかし,実際には,例えば水のように,周波数分散が強い場合や,強誘電体結晶のように等方性で無い場合などはこのような式があてはまらない.本研究では,先ず理想的な仮想誘電体として水と同じ比誘電率81の媒質と,空中の境界面に半波長ダイポールを設置し,FDTD法を用いて電磁界解析により,過渡応答について検討した. |
| (英) |
The propagation velocity of electromagnetic waves in a medium with a high relative permittivity is commonly expressed as the speed of light divided by the square root of the relative permittivity. When a transmitting antenna is placed near the boundary between such a medium and air, reflections at the interface occur, and it becomes of interest to determine which propagation path allows the electromagnetic field to reach the receiving antenna first. However, in practical materials, this simple relation does not always hold; for example, in media such as water with strong frequency dispersion, or in ferroelectric crystals that are not isotropic. In this study, as a first step, a hypothetical ideal dielectric medium with a relative permittivity of 81, identical to that of water, is assumed, and half-wavelength dipole antennas are placed at the boundary between this medium and air. The transient electromagnetic field response is investigated using time-domain electromagnetic field analysis based on the finite-difference time-domain (FDTD) method. |
| キーワード |
(和) |
WPT / ワイヤレス電力伝送, / 空間伝送型WPT / 誘電体中無線伝送 / 水中無線伝送 / 過渡解析 / FDTD法 / |
| (英) |
WPT / Wireless Power Transfer / Radiative WPT / Wireless Transmission in Dielectric Media / Underwater Wireless Power Transfer / Transient Response / FDTD Method / |
| 文献情報 |
信学技報, vol. 125, no. 373, WPT2025-64, pp. 37-40, 2026年3月. |
| 資料番号 |
WPT2025-64 |
| 発行日 |
2026-02-23 (WPT) |
| ISSN |
Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
| PDFダウンロード |
WPT2025-64 |
|