RADAR BASICS - UAH
We define the beamwidth of an antenna as the distance between the 3-dB points of Figure 4. The 3-dB points are the angles where is 3 dB below its maximum value. As a side note, the maximum value of is the antenna gain, or . With this we find that the antenna represented in Figure 4 has a beamwidth of 2 degrees in the direction. We might call this . ................
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