Radiation properties of spherical antennas as a function of the location of the driving force

A theoretical analysis is made of the radiation properties of a perfectly conducting sphere excited as an antenna by a driving force that acts in the 0 direction in a narrow strip around the circle of colatitude 0= 00 on the surface of the sphere. As the location 00 is varied, the radiation pattern , together with the current distribution and the input admittance, change. In the present paper some of these effects are analyzed, it is belie ved for the first time. In previous work only the case of center feed is treated.