Abstract: A distributed electromagnetic coil structure for applying a time varying electromagnetic field to a population of living organisms is described. The coil structure comprises at least a substantially planar first coil sub-structure. The first coil sub-structure comprises at least a first wire of a predetermined shape and a least a second wire of a predetermined shape, wherein said first and second wire are shaped to define one or more of first cells. An electromagnetic field is generated by said first cells when a current runs through said first coil sub-structure.

Abstract: Device for applying an electromagnetic field for stimulation of a process within a living organism when applied to at least part of a body, comprising a driver for generating a time varying drive signal and a transducer responsive to said drive signal for generating a time varying electromagnetic field signal B(t). The signal B(t) comprises a superposition of two or more periodic base signals bi(t) (i=1, 2, 3, . . . ). The signal bi(t) is defined as: bi(t)=ai*(2exp(??it)?(1+exp(??iTi/2)) for 0?t?Ti/2 and bi(t)=?bi(t?Ti/2) for Ti/2?t?Ti, wherein Ti is the period of bi(t), ai is an amplitude of bi(t) and wi is a characteristic frequency determining the shape of the signal bi(t).