Analysis of centre-line-driven circular-loop antenna

A closed loop antenna being driven through a straight `centre line¿ conductor which bridges the loop at an axis of the symmetry has been considered. This antenna is called the `centre-line-driven loop antenna¿. In view of the circuit and radiation properties, this is considered as two closely coupled coplanar loops, compressed into a single loop. By approximation of the antenna current by interpolation polynomials, Hallen´s integral equations for this antenna current have been solved by the numerical method, utilising a high-speed computer. The circuit and radiation properties of this antenna are investigated experimentally and numerically. The wideband properties in the radiation pattern and directivity are noteworthy. The most likely applications for this antenna are receiving and transmitting antennas for u.h.f. broadcasting.