back lobe

back lobe

[′bak ‚lōb]
(electromagnetism)
The three-dimensional portion of the radiation pattern of a directional antenna that is directed away from the intended direction.
References in periodicals archive ?
Back lobe is a lobe the degree between its axis and main lobe radiance is approximately 180 degree.
From the E plane graph, directional radiation patterns with small back lobe can be observed (Figure 21(a)).
6 shows the measured radiation pattern, it is found that there is a discrepancy between the simulated and measured one in the back lobe area.
The antenna elements can be arrayed in any desired configuration for specific pattern shaping, including tilting side lobe and back lobe limits and reconfigurable coverage.
The back lobe is in the opposite direction from the main beam, and the side lobes are at other angles.
backlobe] = -90[degrees] by virtue of the matching of the back lobe widths discussed above.
As clearly shown in Figure 13, they are similar in shape with one main lobe and one back lobe.
Without taking these errors into account, a good correlation still exists between the patterns, even in the back lobe region.
Since the ultimate goal of any wireless solution is to provide the most comprehensive signal with as few dead spots as possible, engineering a signal that reduces back lobes and clarifies the signals is a significant piece of a successful solution.
Thus, if we observe them along a line of sight down the major axis of the lobes, the front and back lobes will be projected onto the plane of the sky as filamentary circular blobs, not unlike the halos that we see in the Ring Nebula
The side and back lobes are normally significantly reduced in gain from the "main beam.