Design NoteDN018SWRA169 Page 1 of 14 Range Measurements in an Open Field Environment By Tor-Inge KvaksrudKeywords •Friis Equation •Ground Model •Range •Sensitivity •Transmission Budget 1 IntroductionRange is one of the most important parameters of any radio system. Data-rate, output power, receiver sensitivity, antennas and the intended operation environment all influence the practical range of the radio link. An open field is one of the simplest and most commonly used environments to do RF range tests. However here there are important effects to consider; failing to address these often results in the test results being misinterpreted. This design note addresses non-ideal effects to consider when doing open field range measurements. In this note “open field” refers to a large open area without any interfering radio sources, i.e. a soccer field.
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