Pyramidal horn antenna gain calculations in receiving mode using FDTD technique

A few widely used incident wave models for pyramidal horn antenna analysis are compared on the basis of gain computations. The finite-difference time-domain (FDTD) technique is applied to compute the gain of horn antennas in this receiving mode. The computed gains are compared with published measured results. The computed results agree well with the measurement for high-gain horn and also for lower gain horn.