Admittance Dependence of the Infinite Cylindrical Antenna Upon Exciting Gap Thickness

Abstract

The admittance of an infinite cylindrical antenna is calculated as a function of exciting frequency and exciting gap thickness. The results obtained show that an asymptotic analytical expression derived for the susceptance by Chen and Keller and also later by Fante, is strictly valid only in the limit of vanishing gap thickness. An altenate analytical form is presented for die susceptance, which removes this restriction and which gives good agreement with the correct susceptance values obtained in this study.