(c) Rectangular Grid (Uncompensated) 
Let WV, = 2m be the number of elements in the x-direction, and 
Nz = 2n be the number in the y-direction. Let the separation 
of any two consecutive elements be d, and dz in the x-direc- 
tion and y-direction, respectively (fig. 5). 
Ah 
P(x, Yo: Zo) 
(x, Y,) 
Figure 5. Source and elements of a rectangular array. 
Then the coordinates of the jth element will be (7 + 1/2)d,, 
(2 + 1/2)dz, +1/2 depending on whether 7 is negative or 
positive, respectively . Then the uncompensated oar 
corresponding to equation (3) becomes 
+N, a 
a7 
R= \ y E, 7 OxP Je LGA / Addy cosat(2+1/2)dscoss 
ye ae 
ol (cosy, hall 
3 
