![]() These are usually called “yagi” antennas. The other type of gain is directional and is important for base stations. If your desired coverage area is hilly then a ¼ wave omnidirectional antenna will be better. On an open and flat highway, a high gain antenna will be better…3 dB, 6 dB, etc. ![]() Mobile antenna choice has a lot to do with the physical terrain. As you can see in the illustration, using a gain antenna may cause poor performance in a hilly environment. Typically, antennas with gain will lose the vertical propagation or “roundness” of the pattern and become flattened and elongated with the higher gain antenna you choose. Since an antenna does not make power, increasing gain in one direction will decrease propagation in another. Unity gain (equivalent to 0 dB gain) ¼ wave antennas propagate RF in an omnidirectional, or circular pattern. ![]() ![]() Different antenna designs have different propagation patterns. In this blog, we take a look at the conditions that may affect coverage and help you select the appropriate gain antenna for best results.Īntennas do not make power they only propagate radio waves. When looking at mobile two-way radio coverage, many users jump to the conclusion that the higher the gain rating is on an antenna, the better the coverage. ![]()
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