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Low-cost and small-sized medical microwave radiometer design

In the past decades research in microwave radiometry has been conducted for use in medical applications [1]. Detection of breast cancer, hyperthermia, and measurment the temperature brain temperature of newborn babies are areas here this technique have been used. Russian scientists have developed a radiometer which is sold under the name of RTM-01 for the detection of breast cancer. The technical details of this radiometer is not known, and are therefore difficult to be tested. The detection procedure is to make symmetrical point measurements for each breast. Total power radiometer consists of a high gain low noise amplifier followed by a square law detector and integrator. This radiometer is prone to amplification drift. Dicke radiometer uses a switch in front between the sensor antenna and a reference. Whitch can remove the system drift. The goal of the present design is to determine whether it is possible to create small sized frontstage to a radiometer, using inexpensive commercial surface mount device (SMD) components. The tradeoff between low- and high frequency radiometer band must also be considered, as the first in general requires a larger antenna, but can penetrate deeper into the body tissue [2]. The emissivity and spatial resolution does also increases with higher frequency.