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Achieving Optimum Radio Range
When designing a system based upon a radio link, the maximum range between the transmitter and
receiver is one of the most important parameters that will dominate the system configuration and
installation. Most radio systems optimize the range since this avoids the use of repeater units or
amplifiers. Maximum range should always be targeted and if the range distance is too great, then the
output power can always be reduced and current consumption reduced.
Sending a radio signal through concrete re-enforced brick walls in an urban RF noisy environment a few
100 meters can be as just challenging as achieving a long range line-of-sight (LOS) distance with several
km of distance
Choosing the optimum frequency for your system is not always a clear choice with ISM bands ranging
from 169 MHz band to 2.4 GHz band. Antenna performance and location, output power regulations,
unwanted RF jammers, operating frequency, radio configuration and material between the Tx and Rx units
all determine the maximum radio range distance; all these parameters and the effects they have on the
total range are covered in this application report.
Examples of realistic range expectations are shown and are based on a 2-ray Friis model, which can also
take into account typical construction building materials. This application report also illustrates the range
tests that have been performed with various user scenarios: high rise building apartment test, dense urban
environment test and long range tests at high altitudes.
Achieving Optimum Radio Range.pdf
(8.48 MB, 下载次数: 8)
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