Electromagnetic radiation from ingested sources in the human intestine between 150 MHz and 1.2 GHz
作者： L.C. Chirwa , P.A. Hammond , S. Roy , D.R.S. Cumming
关键词:
摘要: The conventional method of diagnosing disorders the human gastro-intestinal (GI) tract is by sensors embedded in cannulae that are inserted through anus, mouth, or nose. However, these cause significant patient discomfort and cannot be used small intestine. As a result, there considerable ongoing work developing wireless can radiation characteristics sources GI readily calculated due to complexity body its composite tissues, each with different electrical characteristics. In addition, compact antennas electrically small, making them inefficient radiators. This paper presents for should allow optimum design more efficient telemetry systems. determined using finite-difference time-domain realistic antenna model on an established fully segmented model. Radiation intensity outside was found have Gaussian-form relationship frequency. Maximum occurs between 450 900 MHz. gut region generally inhibit vertically polarized electric fields than horizontally fields.
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