Height and Angle Characteristics of Point Source Transmitting Power of Wireless Avionics Intra-Communication Systems Based on FDTD Analysis
Keywords:aircraft, large-scale finite-difference time-domain method, point source transmitting power, radio altimeter interference, wireless avionics intra-communication
The equivalent isotopically radiated power (EIRP) of a wireless avionics intra-communication (WAIC) system is limited to 6 dBm/MHz at the geometrical center of the aircraft, to avoid interference with aircraft radio altimeters, which are operated at the same frequency band between 4,200– 4,400 MHz. In this paper, the height and angle characteristics of the point source EIRP of a WAIC system are analyzed based on the large scale FDTD analysis. Firstly, the strength of the electric field (E-field) around the three-dimensional model of Airbus A320-200 is analyzed. Then, the point source EIRP is calculated based on the analyzed E-field strength. Finally, the height and angle characteristics are analyzed to estimate the electromagnetic field characteristics of the aircraft.
International Telecommunication Union, Resolution 424 of World Radiocommunication Conference 2015, “Use of wireless avionics intra-communications in the frequency band 4200-4400 MHz,” Nov. 2015.
Radio Technical Commission for Aeronautics, “DO-378 - Minimum Aviation System Performance Standard (MASPS) for Coexistence of Wireless Avionics Intra-Communication Systems within 4200-4400 MHz,” July 2019.
S. Futatsumori, et. al, “Analysis of Radar Altimeter Interference due to Wireless Avionics Intra-communication Systems by Using Large-scale FDTD Method—Investigation on Airbus A320 Class Passenger Aircraft,” Proceedings of the 34th International Review of Progress in Applied Computational Electromagnetics, pp. 1-2, Mar. 2018.