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

Author

Kotsuka, Y. ; Orii, K. ; Kojima, H. ; Kamogawa, K. ; Tanaka, M.

Author_Institution

Dept. of Telecommun. Eng., Tokai Univ., Kanagawa, Japan

Volume

2

fYear

1999

fDate

13-19 June 1999

Firstpage

607

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/spl deg/C to 50/spl deg/C. Tests using a phantom material show that a prototype thermometer can be read through at least 7 cm of soft tissue.

Keywords

MMIC oscillators; biomedical electronics; biomedical measurement; biomedical telemetry; biothermics; bipolar MMIC; hyperthermia; microwave heating; radiation therapy; radiofrequency heating; silicon; thermometers; voltage-controlled oscillators; 30 to 50 C; 3D MMIC technology; 4.35 GHz; 7 cm; RF thermal therapy; Si; Si BJT VCO; bipolar transistor; microwave thermal therapy; temperature detection; voltage controlled oscillator; wireless-thermometer; Biological materials; Bipolar transistors; Imaging phantoms; MMICs; Materials testing; Medical treatment; Radio frequency; Silicon; Temperature; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1999 IEEE MTT-S International

Conference_Location

Anaheim, CA, USA

Print_ISBN

0-7803-5135-5

Type

conf

DOI

10.1109/MWSYM.1999.779835

Filename

779835