However, it only stores a predetermined number of best states at each level (called the beam width).
The greater the beam width, the fewer states are pruned.
The beam width bounds the memory required to perform the search.
The beam width can either be fixed or variable.
This relationship between beam width and divergence is due to diffraction.
Reception is typically lost for only a few minutes on the worst day, but the beam width of the dish can affect this.
With an additional Kerr lens the beam width gets smaller.
The pulsed light exits the end face with a smaller beam width and no divergence.
Using other definitions of beam width does not work.
A typical radar antenna commonly has a beam width of a few degrees.