Sensitivity analysis of beam pointing angle of planar phased array antennas due to phase error of elements

Document Type : Original Article

Abstract

Sensitivity  analysis  has  been  done  in  two-dimensional  phased  array  antennas.  Numerical  methods  of  computing  the
beam pointing angle in these arrays has been investigated. The used numerical method has been validated by numeri-
cal computing the array factor and beam pointing angle if the array. Deviation of beam pointing angle due to phase
deviation of each element of the array is computed and it is shown that the phase error of peripheral elements have
more influence in beam pointing angle in two-dimensional arrays than the phase error of inner elements. This result
is important because by knowing it we should phase the peripheral elements more accurately in comparison of phas-
ing the inner elements. For example in choosing the phase shifters, we can use the more accurate and expensive ones
for the peripheral elements and the phase shifters with lower accuracy and less expensive can be used for the inner
elements which has less impact on beam pointing error.

Keywords


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