The central portion of a dish beam pattern, the main lobe, shows how narrow a region of space can be targeted. This is a very important factor considering that some satellites separated by 2° appear to be very closely spaced together from a receive site on earth. A dish detects most power via its main lobe. The beamwidth is defined as the width of this main lobe between "half power" points where detected signal power has dropped by 501r 3 dB. The smaller the beamwidth, the more narrow the field of view. It beamwidth is too great and satellites are spaced too closely together, more than one signal might be detected via the main lobe. Beamwidth decreases as both signal frequency and dish diameter increase. For example, a dish will have a third of the beamwidth at Ku-band than at C-band because the frequency is three time higher.