Abstract: Radiation field of arbitrarily oriented linear antenna overa conducting rotationary smooth body is researched.By utilizing methodsof moment and Fourier analysis,the expressions for harmonic compo-nents of induced currents on the conducting surface are given,and thenthe radiation field may be evaluated.As an example,the radiation fieldof an oblique Hertz dipole over a sphere is calculated and compared withthat obtained by classical method.Two results are identical.