New thermometer for RF and microwave thermal therapy using MMIC inSi BJT VCO type


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    • Author:  Kotsuka  Y. Orii  K. Kojima  H. Kamogawa  K. Tanaka  M. Dept. of Telecommun. Eng.  Tokai Univ.  Kanagawa ;  

    • Abstract:  Abstract A new wireless-thermometer is proposed for thermal therapy that uses a silicon bipolar transistor voltage controlled oscillator (Si VCO), based on three-dimensional (3D) MMIC technology. The method for detecting temperature is examined. As the result, the VCO's oscillation frequency (around 4.35 GHz) is extremely linear against temperature from 30°C to 50°C. Tests using a phantom material show that a prototype thermometer can be read through at least 7 cm of soft tissue

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