On the electrically small bare loop antenna in a dissipative medium

Two approximate methods for analyzing the electrically small circular-loop antenna in a dissipative medium have been presented in the literature. Admittances calculated by these methods are compared with the twenty-term Fourier series results which are known to be in good agreement with experimental data. The conductance predicted by both methods is in poor agreement with the Fourier series results. The reason for this difference is determined and a simple, accurate formula obtained for the admittance. The far-zone electric field maintained by the current on the loop is determined, and the accuracy of assuming a uniform current on the loop for field calculations is discussed.