Cylindrical transmitting antenna: Tapered resistivity and multiple impedance loadings

A general formulation is presented which treats with accuracy the perfectly conducting antenna, the uniformly resistive antenna, the tapered resistive antenna, and the multiple impedance loaded antenna. The current distribution is obtained in analytic form that is easily used to obtain the effective length and radiated field. The presented theory has application in traveling-wave antenna design. Traveling-wave antennas are of interest for broadband and directional communication. Extensive numerical results are obtained, and comparisons are made with experimental data. The results indicate the feasibility of cylindrical traveling-wave antennas.