Broadband RC-loaded microwave cylindrical antenna with approximately real input admittance

Abstract

A method is presented for theoretical synthesis of loaded broadband cylindrical antenna with minimized input susceptance. Such an RC-loaded antenna was synthesized and realized, having the v.s.w.r. with respect to a real impedance of about 1.1 in a frequency range of almost 3:1, thus being probably the best cylindrical broadband antenna available. The antenna radiation pattern was found to be reasonably stable in the whole frequency range.