It is shown by the review of the related experimental work of biological electromagnetic effects that the current experimental devices are mainly narrow-band and pulse electromagnetic radiation devices with insufficient versatility.With the development of wireless systems

the electromagnetic environment spectrum will span from thousands of hertz to millimeter waves and is multi-band composite electromagnetic field

including the ultra-wide band vector-modulated electromagnetic fields.Some of them have pulse slot characteristics.It is obvious such electromagnetic environment as simulation and reproduction for the biological electromagnetic effect needs to be tested.However

the traditional electromagnetic radiation experimental device has remarkable limitation.Therefore

the scheme of new experimental device based on ultra-wideband coaxial cone cavity is proposed.It is shown by both theoretical and experimental measurements that the only the single cavity of the new experimental device possesses the ability to generate ultra-wideband electromagnetic fields from DC to 40 GHz/67 GHz.Under the same feed power condition

the strength of the electric field excited by it is more than twice that of the antenna and thus possesses such two characteristics as ultra-wideband and high field strength and

furthermore

can achieve multi-band composite electromagnetic radiation and can meet the needs of complex electromagnetic environment reproduction in the experiment of biological electromagnetic effect.