Abstract: In order to understand the Maxwell theory, the electromagnetic wave (EMW) is visualized for new comer with the demonstration experiment. The radiation of a mixed transmission antenna, regarded as a mixture of the small magnetic and electrical dipole antennas, is not the same as that of the ideal magnetic dipole antenna due to the introduction of a gap. The discrepancies of the radiated energy flux density are discussed between the mixed antenna and ideal magnetic dipole antenna according to superposition theorem (ST) of the induced electrical field. 

Key words: electromagnetic wave (EMW), a mixed transmission antenna, superposition theorem (ST), energy flux density