Abstract:

A theoretical method for far-field distribution analysis of communication base-station antenna under the condition of flat ground is introduced.A proper 3D model is established by the ray tracing method based on the electromagnetic scattering matrix theory about the relationship between scattering field and incident field.The most common symmetric antenna (Electric Dipole) is used to simulate a 900 MHz base station antenna of floor type.The simulation result is compared with the measured data,which shows that the contribution of the incident wave and the reflected wave to the field of distant point should be considered for the comparable standard in the range of 30 m away from the base station,otherwise,only the incident wave should be considered.

Key words: electromagnetic radiation;base-station antenna;the ray tracing method