A microwave exposure system for use in the study of the bioeffects of cw microwave radiation has been designed, built, and calibrated. The specifications to which the system was designed are as follows: single frequency of 2450 MHz; power density range at the biological sample holder of 0.01ndash;200 mWsol;cm2; uniform field at the sample holder as defined by a 10percnt; variation in power density over a 15 cm diameter and halfhyphen;power variation over a 30 cm diameter; minimum cost consistent with safety, reasonable convenience of operation, and meeting technical criteria; and total space requirement not to exceed a floor space of 4.1times;4.9 m. The assembled system costs approximately $13 000 and provides better field characteristics than those specified above.
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