期刊
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
卷 16, 期 -, 页码 1895-1898出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2017.2685503
关键词
Biomedical antennas; medical applications; microwave heating; microwave radiometry; radio frequency interference (RFI)
Successful proof-of-concept studies of biomedical devices, using combined heating and radiometry for noninvasive assessment of tissue by thermal methods, requires innovative approaches of biomedical antenna design and testing, and proper radio frequency interference (RFI) mitigation. In this letter, a dual-mode (heating/radiometry) antenna, for 0.9 GHz heating and similar to 3.7 GHz radiometry, and methods for the RFI reduction and assessment are introduced. The impact of different dielectric barriers needed for interfacing with a perfused tissue phantom on the antenna performance is also demonstrated. The antenna performance remains unchanged as long as the overall thickness of the superstrate and barrier is maintained the same. Tests are performed on a novel phantom, mimicking a perfused tissue, and pertinent radiometric measurements are conducted for the first time. Evaluation of the radiometer output and direct RFI measurement both reveal marked reduction in the RFI effect, after the inclusion of a back housing and an RF choke.
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