The lab generates data in various ways, measuring the gain (really power directivity) . However most presentation is made using the round graphs or charts you see in each of our antenna detail pages. Below is an example chart of a directional antenna and its easy to understand once the viewer knows how to look at... more

An elevation chart, (shown for omni-directional but not provided for our directional antennas) would look the same on paper, but the signal would be a bit narrower or wider, usually within 12% of the azimuth. The elevation is a view of the signal as if one is looking at it standing on the ground and looking out... more

The chart depicts an antenna with a peak gain of 14.29 dBi and it is 1 degree to the right of center. The 1 to 3 degree off center can be a minor misalignment when the antenna was mounted on the rotor system in the test chamber and is insignificant. The beamwidth shown is 30.44 degrees wide. Beamwidth is normally... more

For an omni-directional antenna, things are similar. Here we provide both the elevation (upper chart) and the azimuth, bottom chart.   The elevation again is a side view.    The horizontal line showing -90 and 90 which is exactly in the middle of the chart horizontally is the ground.... more

How does a lower or higher gain antenna compare? Any higher gain antenna will provide a longer beam but it will be narrower. For example our 30 degree directional example provides 14.29 dBi, now if we have an antenna with double the forward power, or 17.29 dBi then the beam width should be half, or just 15... more

How do these charts show what’s real world performance? In basic terms, the ends of the chart, or I mean out near the borders could be many miles or kilometers. And the 18 degrees of signal width could be several thousand feet. Referring to our omni 8dBi antenna. Just a brief example, this omni antenna at the... more