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Creators/Authors contains: "Streeter, Rob"

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  1. ; ; ; (, IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology)
    This paper addresses microwave radiometry for passive non-invasive subcutaneous temperature measurements at a few centimeter depth in tissues. A correlation radiometer is designed in the quiet 1.4-GHz band and tested on aqueous phantoms. The radiometer is designed from off-the-shelf components and first tested with a matched load, and then with a near-field planar compact probe antenna, both with two temperature-controlled water phantoms of different volumes. The measurement resolution, sensitivity and long-term stability is quantified in terms of integration time for a simple three-point calibration. The lowest measured absolute error compared to a ground-truth thermocouple measurement is 0:25K over one hour of data collection with a single calibration. Measurements show that an integration time of > 1 s results in an absolute error limited by the radiometer gain fluctuations. 
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