A continuous microwave particulate treatment system for treating fluid from a wellbore. A transmitter circuit adjusts a phase between the true component and the complement component of the differential signal, based on the eye margin, to improve the eye margin. The method further includes inserting at least a portion of the end portion of the rotatable element into the lower section. in examples described, the printheads provide an array of nozzles which is substantially continuous across the array of printheads.