Analysis of Radiation Pattern for Airborne Double-Ridged Horn Antenna

In this paper, the Uniform geometrical Theory of Diffraction(UTD)is first time employed in conjunction with approximate models of the aircraft structure to analyze the effect of aircraft for double-ridged horn pattern on the top fuselage and to analyze the scattering field formulas effected by aircraft structure. The scattering fields are computed while the radiation pattern of double-ridged horn antenna mounted on the top of an aircraft is obtained. The simulation results show that the effect of the aircraft on radiation pattern is the surface reflecting field, the edge scattering field, and the surface creep wave which contributes to the backload of the pattern. The results of this paper can be used to analyze the radiation pattern of airborne antenna and to optimize the airborne antenna disposition.