There is described a power splitter for directing electromagnetic power comprising: an input port for receiving the electromagnetic power; at least one dielectric element placed inside the power splitter; at least two output ports for outputting the power according to a splitting ratio, the at least two output ports placed on a surface opposite to the input port; and at least one dielectric moving device for positioning the at least one dielectric element between the at least two output ports to dynamically direct the power into the at least two output ports according to the power splitting ratio.