A New Microstrip Radiator For Medical Applications

Ring-type microstrip antennas appear to offer important advantages in medical therapy when used for local tissue heating. In designing these radiators, the properties of a microstrip covered with layers of lossy dielectric representing various tissue layers have to be taken into account. This paper...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 1980-12, Vol.28 (12), p.1464-1469
Main Authors: Bahl, I.J., Stuchly, S.S., Stuchly, M.A.
Format: Article
Language:English
Subjects:
Applicators
Biomedical equipment
Electromagnetic heating
Geometry
Impedance matching
Infrared heating
Medical services
Medical treatment
Microstrip
Muscles
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Summary:Ring-type microstrip antennas appear to offer important advantages in medical therapy when used for local tissue heating. In designing these radiators, the properties of a microstrip covered with layers of lossy dielectric representing various tissue layers have to be taken into account. This paper provides basic information on design of ring-type radiators for tissue heating and the experimental results for a unit designed to operate in the TM modes at 2.45 GHz. The radiator is well matched when spaced 1.3-3 mm from muscle tissue or muscle tissue covered by a thin layer of fat tissue. A limited volume of muscle tissue is heated at a greater rate than the fat layer as shown by a thermographic technique.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.1980.1130268