Abstract: A method and device are disclosed for receiving, analyzing, generating and transmitting microwave electomagnetic radiation in the range of 30 to 300 GHz with spectral power density less than 10.sup.-9 W/Hz. Practice of the invention allows analysis of the microwave spectra of living organisms. Aberrations in the spectrum of a target organism may be identified by comparison with a control organism or with a standardized spectrum. A corrective microwave spectrum may then be administered in an accurate and efficient manner under continuous monitoring. The device disclosed is comprised of receiving and transmitting antennas connected to a multi-channel retranslator, a controlled source of microwave spectra, and measuring and controlling systems.