Title :
Field analysis of annular microstrip antenna for hyperthermic applicators
Author_Institution :
Dept. of Electron., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
An annular microstrip antenna in contact with the skin is analyzed using the exact image principle. The antenna is designed primarily for the measurement of temperature profiles to detect breast cancer. The current of the strip is solved using the electric field integral equation, the Galerkin method is applied together with continuous trigonometrical basis functions, and the consequent near-field distributions for different antennas are plotted. The dependence of the focus size on the radius of the antenna is calculated. It is shown that the focus can be further reduced by using two annular rings together.<>
Keywords :
biological effects of microwaves; biomedical equipment; biothermics; loop antennas; microstrip antennas; patient diagnosis; Galerkin method; annular microstrip antenna; breast cancer; continuous trigonometrical basis functions; electric field integral equation; exact image principle; field analysis; focus size; hyperthermic applicators; near-field distributions; temperature profiles measurement; Antenna measurements; Breast cancer; Cancer detection; Hyperthermia; Image analysis; Integral equations; Microstrip antennas; Moment methods; Skin; Temperature measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1988. AP-S. Digest
Conference_Location :
Syracuse, NY, USA
DOI :
10.1109/APS.1988.94146
