Abstract—In this paper, an approximate closed-form expression of the electric field of a conical horn with linear flare is formulated. Copolarization and cross polarization component of the electric field are calculated from the spherical field components using Ludwig’s third definition of copolarization and cross polarization. The calculated field expression is found to be in close agreement with experimental results found in literature. The radiation characteristics of the conical horn are analyzed using the derived field expressions.

Index Terms—Conical horn antenna, copolarization and cross polarization.

The authors are with the Department of Electrical and Electronic Engineering, Bangladesh University of Engineering and Technology, Dhaka–1000, Bangladesh. (Phone: +8801712646464; e-mail: asifzaman13@gmail.com).

Cite: Mohammad Asif Zaman, Md. Gaffar, Md. Mushfiqul Alam, Sayed Ashraf Mamun, Sajid Muhaimin Choudhury and M. A. Matin, "Approximate Closed-Form Expression of the Electric Field of a Conical Horn Antenna," International Journal of Computer and Electrical Engineering vol. 3, no. 1, pp. 48-54, 2011.