講演抄録/キーワード |
講演名 |
2019-11-01 13:20
Electromagnetic Field Strength Evaluations at 4 GHz Wireless Avionics Intra-Communication Band Using Experimental Aircraft
-- Measurements Assuming WAIC Transmitters Installed Inside and Outside of Beechcraft B300 Aircraft -- ○Shunichi Futatsumori・Kazuyuki Morioka・Norihiko Miyazaki(ENRI)・Tetsuya Sekiguchi・Takashi Hikage・Toshio Nojima(Hokkaido Univ.) SANE2019-68 |
抄録 |
(和) |
This study discusses electromagnetic field (EMF) strength characteristics at a 4 GHz Wireless Avionics Intra-Communication (WAIC) band around an actual aircraft. Since aircraft radio altimeters and WAIC systems are operated at the same frequency band of 4.2–4.4 GHz, the spectrum sharing conditions of both systems need to be investigated. The electric field (E-field) strength, which is assumed to be radiated from the WAIC transmitters installed inside and outside of the cabin, is evaluated based on the international standards. Firstly, an E-field strength measurement set-up using Beechcraft B300 (King Air 350) aircraft at Sendai Airport is discussed. Next, three transmitting antenna locations are explained. Finally, discussion of the E-field strengths recorded at the different receiving antenna locations and showing typical radiation characteristics of the WAIC transmitters installed on the aircraft is covered. The results show that the height of the receiving antenna equal or closest to that of the transmitting antenna exhibits the highest total E-field strength in the three measurement conditions. In addition, the importance of measuring both polarizations to obtain the maximum total E-field strength is highlighted. This can be used for estimating the maximum transmitting power of the WAIC system in the future. |
(英) |
This study discusses electromagnetic field (EMF) strength characteristics at a 4 GHz Wireless Avionics Intra-Communication (WAIC) band around an actual aircraft. Since aircraft radio altimeters and WAIC systems are operated at the same frequency band of 4.2–4.4 GHz, the spectrum sharing conditions of both systems need to be investigated. The electric field (E-field) strength, which is assumed to be radiated from the WAIC transmitters installed inside and outside of the cabin, is evaluated based on the international standards. Firstly, an E-field strength measurement set-up using Beechcraft B300 (King Air 350) aircraft at Sendai Airport is discussed. Next, three transmitting antenna locations are explained. Finally, discussion of the E-field strengths recorded at the different receiving antenna locations and showing typical radiation characteristics of the WAIC transmitters installed on the aircraft is covered. The results show that the height of the receiving antenna equal or closest to that of the transmitting antenna exhibits the highest total E-field strength in the three measurement conditions. In addition, the importance of measuring both polarizations to obtain the maximum total E-field strength is highlighted. This can be used for estimating the maximum transmitting power of the WAIC system in the future. |
キーワード |
(和) |
Electromagnetic field / Radio altimeter / Radiation power / Spectrum sharing / Wireless Avionics Intra-Communication / / / |
(英) |
Electromagnetic field / Radio altimeter / Radiation power / Spectrum sharing / Wireless Avionics Intra-Communication / / / |
文献情報 |
信学技報, vol. 119, no. 255, SANE2019-68, pp. 101-105, 2019年10月. |
資料番号 |
SANE2019-68 |
発行日 |
2019-10-24 (SANE) |
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 |
SANE2019-68 |