Wavepoint Research completed an SBIR Phase I project for the Air Force (AFRL/HEDR) to investigate the feasibility of providing a RF/Microwave Hazard (RHAZ) Assessment Tool. |
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| The objective of the Phase I effort was to determine the feasibility of performing RF/Microwave hazard (RHAZ) assessment for typical scenarios of transmitted energy from RF and microwave radiation sources. The investigation focused on maximum permissible exposure (MPE) levels and strove to efficiently calculate field strength levels for comparison against the MPE thresholds. Both far-field and near-field calculation methods were utilized to generate the field strength values. In addition, the Numerical Electromagnetics Code – Basic Scattering Code (NEC-BSC), developed at the Ohio State University ElectroScience Laboratory, was used as a primary engine for computing field strength values for hazard assessment. A prototype RHAZ tool was developed that allowed user input of radiating sources, including phased arrays, as well as inclusion of common reflecting objects such as communication towers and poles. The functions created in this project have already been applied to commercial requirements for pattern distortion analysis as well as RF Radiation (RFR) assessment for multiple emitter sites. |
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| The analysis tools developed for the RHAZ Tool provide a means for range safety officers and Base Bio-Environmental Engineers to determine the level of hazard associated with radiofrequency and microwave emitters in the vicinity of personnel that may be exposed in either controlled or uncontrolled settings. A key objective of this tool is to provide accurate and reliable results without requiring the user to be an antenna or electromagnetics expert. In addition to DoD applications, the RHAZ tool also finds application in civilian applications such as broadcasting and other communication facilities where occupational and general public hazard potential is a concern. The analysis components already developed are also suitable for use in determining field strength levels and radiation characteristics of antennas mounted on vehicles and other platforms. |
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The Matlab functions developed under this effort are applicable to a number of antenna analysis purposes, including the need to optimize placement of high power radiating sources on manned vehicles in order to minimize the hazard to personnel manning the vehicle while still satisfying the need of the mission. |
