Title :
A 4.4 GHz microwave thermometer with compensation of reflection coefficient
Author :
Stec, Bronidaw ; Susek, Waldemar
Author_Institution :
Inst. of Radar Technol., Mil. Univ. of Technol., Warsaw, Poland
Abstract :
The paper reviews the physical principles of thermal radiation measurement at microwave frequencies. A 4.4 GHz microwave thermometer with compensation of reflection coefficient and digital control loop is presented. The radiometer is applied to making three-dimensional thermal maps of human tissues. Reflection coefficient compensation is discussed, using as an example a simple model of noise power exchange at the antenna-object interface. In addition, measurements for various reflection coefficients (0.05+0.9) are presented in a graphical manner
Keywords :
biological tissues; compensation; digital control; heat radiation; microwave imaging; 4.4 GHz; antenna-object interface; digital control loop; human tissues; microwave thermometer; noise power exchange; reflection coefficient compensation; thermal radiation measurement; three-dimensional thermal maps; Acoustic reflection; Antenna measurements; Digital control; Frequency measurement; Humans; Microwave frequencies; Microwave measurements; Microwave radiometry; Power markets; Reflector antennas;
Conference_Titel :
Microwaves, Radar and Wireless Communications. 2000. MIKON-2000. 13th International Conference on
Conference_Location :
Wroclaw
Print_ISBN :
83-906662-3-5
DOI :
10.1109/MIKON.2000.913967
