Abstract: The electromagnetic device and method for treating cancers or tumors changes the metabolism of cells, helping to stop proliferation of cancers or tumor cells inside or on the body. The device includes an RF frequency generator for generating an RF carrier signal, a low frequency generator for generating a modulating signal, a modulator for frequency modulating the RF carrier signal with the modulating signal to produce a frequency-modulated output signal, and an antenna with a parabolic trough reflector for directing the modulated signal to a patient's body. The method includes applying the signal for predetermined periods of time with a power density of between 1 mW/cm2 and 15 mW/cm2 at an RF frequency between 100 MHz and 900 MHz, more specifically between 400 MHz and 500 MHz, the carrier signal being frequency-modulated by a modulating signal between 100 Hz and 10 kHz, more specifically 1-4 kHz.

Abstract: An improved laser electrode coating is disclosed for use in conjunction with CO.sub.2 lasers. The coating utilizes dual layers of materials. The first layer is a dielectric material while the second layer is a catalyst. The combination of the two layers helps to reduce the electric field intensity within the amplification volume of the laser while improving the rate of recombination of disassociated CO.sub.2. The coating increases both the power output and efficiency of a standard CO.sub.2 laser.