Sum and Difference Radiation Patterns of a Corrugated Conical Horn by Means of Laguerre-Gaussian Functions

This communication describes a new method to predict the HE11 and TM01 radiated fields from a narrow flare angle corrugated conical horn. A modal expansion of the aperture field in terms of orthogonal Laguerre-Gaussian functions is used. The radiated field is obtained from Kirchhoff-Fresnel´s approximation. Comparison with experimental results demonstrates the method efficiency. In conclusion advantages of the method are outlined.