Antenna Options |
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Why is the Antenna Important
The antenna is a device for transmitting and/or receiving signals - the eyes and ears of your communication system. A good antenna is designed to be "in-tune" to the signal you are seeking - your phone or radio "sees" the signal and you hear a clear conversation. Use a poor antenna and you simply can't communicate effectively. What is Antenna Gain? An antenna must physically meet certain requirements to deliver it's claimed gain. The laws of physics cannot be defeated and without these characteristics there is simply no way to increase antenna gain. Various antenna manufacturers use different references when declaring their gain figures. in the absence of a defined reference, some claims made in catalogs and on retail packaging by some manufacturers are just plain wrong. When selecting an antenna be sure to make a couple of basic checks. 1. Look for a stated gain reference, we'd suggest either dBi, dBd or dB over 1/4 wave. We can't promise that this means the manufacturer has actually tested the gain (like RFI do) but it certainly indicates that they know they need a reference. 2. Compare a couple of antennas that are hanging next to each other in a store, or check the physical length of antennas in a catalogue. If one is claiming 6.5dBi and is 900mm long and another is claiming 9dBi at a similar length then consider how this can be true.
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