How much improvement in range if I replace the 2dBi antenna with a 3.1 dBi antenna on the ground module only of my 915 MHz radio?
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How much improvement in range if I replace the 2dBi antenna with a 3.1 dBi antenna on the ground module only of my 915 MHz radio?
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Are there any other higher gain antennas available that would worth looking at?
For comparison purposes, I'll assume no antenna cable loss and 100mW transmit power.
In terms of transmit (and this will give a general idea of receive also):
2dBi antenna is effectively 158mW EIRP
3.1dBi antenna is effectively 204mW EIRP
What does this mean? I've run some calculations. The theoretical range for both 2dBi antennas is about 2783 meters. In reality, it will be much less (because of loss in the connectors, orientation, and low signal quality.) But we can compare between the other values:
2 dBi to 2 dBi will be 2783m