Should I chose a directional or omnidirectional antenna for my datacard or modem?
This depends of what level of signal you want or need. The advantage of directional antennas is that they offer higher gain than omnidirectional antennas and this very much enhances your prospects of improved reception. The only disadvantage of directional antennas is that you have to point the antenna towards your nearest tower (base station) which takes a little time to set up. The omni antenna has less gain than a directional antenna, but you do not have to spend time pointing the antenna in the right direction. Our highest gain antenna is the SLP1.7-2.5-11 which offers 11 dBi of gain. Providing you have at least some kind of weak signal on your datacard where you install the SLP then usually you will see a great leap in performance. Our SMP panel antenna has slightly lower gain at 9 dBi, but this also supports all GSM frequencies should you need it. 3.
