THERAPEUTIC POSSIBILITIES OF MICROWAVES

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Abstract
In spite of the fact that radar is considered as one of the outstanding developments of World War II, its principles are not new. Radar operates on the principle of sending out extremely short pulses of high frequency energy and measuring the time interval required for this burst of energy to reach its destination and be reflected back to its source. By knowing the length of time required for the energy to travel back and forth, distance to the object can be accurately measured. The magnetron is essentially a device which can be pulsed rapidly for intervals of the order of microseconds and is capable of delivering hundreds, thousands or millions of watts of power at wavelengths in the centimeter range or shorter. During the war the magnetron and other microwave tubes have been used almost solely for detection and direction applications. For these applications a pulse-echo system is employed.

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