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Active antennas in medical microwave radiometry

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2 Author(s)
Jacobsen, S. ; Dept. of Phys. & Technol., Univ. of Tromso, Tromso ; Klemetsen, O.

The use of active antennas in microwave radiometric thermometry is investigated, where prospective applications are within biomedical diagnostics. By incorporating a tiny low-noise amplifier, with only marginal self-heating, in the antenna probe, it is shown that the temperature accuracy of a broadband radiometer can be improved as a consequence of a smaller overall system noise figure. Proof of concept is verified experimentally through increased detectability of a hot object within a lossy medium.

Published in:

Electronics Letters  (Volume:43 ,  Issue: 11 )

Date of Publication:

May 24 2007

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