However if you do have line of sight, then there are some simple calculations that can be done.Īt long distances, Earth's curvature limits the line of sight distance. I used to link to some tools using the Longley-Rice model, however I can no longer find any that are freely available. Without line of sight, a link is achieved only by reflection and diffraction off/around other objects in the environment, and this must be offset by higher transmit powers or antenna gain if there is insufficient margin in the link budget.Įstimating coverage in the absence of a clear line of sight requires some non-trivial modelling. According to the calculator presented in the website, I shouldn't go below 10 meter in height, to get atleast 10 km of the range.Īt VHF and above, communication is easiest when the stations have a clear line of sight. The link over here relates range to height of the antenna. It limits the range of the LOS communication due to curvature of the earth. I came across another interesting concept. However, since I don't have much knowledge with the antennas, I think i might be missing concepts like fresnel zone. I have been reading about Fresnel Zone and understand that any obstacle in the zone will limit the range and solution would be to increase the height of the antenna or the end node. What would be minimum and maximum height for my setup? And what factors limit the height of the LoRaWAN antenna? I want to know how to calculate height required for getting a particular range. I have been using omnidirectional 3dBi dipole antenna FRP (Fibre-glass Epoxy Antenna) for 868 MHz.īelow is the picture of my antenna (please ignore the specification in the picture): I have designed a LoRaWAN gateway and it is under testing.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |