The electromagnetic environment outside and inside five urban hospitals, due to fixed, EXTERNAL TRANSMTTERS (30-1000 MHz range), was characterized by measurement. Measured fields generally remained below 130 dB$ mu$V/m (3 V/m). Four computational prediction methods, based on line-of-site free-space propagation, Uniform Geometric Theory of Diffraction, and urban clutter models, were evolved. Fields predicted outside these hospitals were compared to the measured fields. A simple line-of-sight method predicted fields within 20 dB of those measured, thereby easily providing an estimate of the worst-case fields at a hospital. The most complex of these prediction methods estimated field levels to within 10 dB. / Measurements were also used to analyze signal propagation characteristics inside buildings due to INTERNAL SOURCES operating at 433, 861, and 1705 MHz. Cross-floor propagation paths, where multiple floors and walls were traversed, showed fields were independent of the transmitter-receiver separation distance. Signals measured for a separation of one floor were higher than same-floor signal levels.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.26436 |
| Date | January 1994 |
| Creators | Vlach, Philip Thomas |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Engineering (Department of Electrical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001430324, proquestno: MM99989, Theses scanned by UMI/ProQuest. |
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