Graphics Programs Reference
In-Depth Information
8.5. Planar Arrays
Planar arrays are a natural extension of linear arrays. Planar arrays can take
on many configurations, depending on the element spacing and distribution
defined by a Ðgrid.Ñ Examples include rectangular, rectangular with circular
boundary, hexagonal with circular boundary, circular, and concentric circular
grids, as illustrated in Fig. 8.19.
Planar arrays can be steered in elevation and azimuth ( , as illustrated
in Fig. 8.20 for a rectangular grid array. The element spacing along the x- and
y-directions are respectively denoted by and . The total electric field at a
far field observation point for any planar array can be computed using Eqs.
(8.24) and (8.25).
(
θφ
,
)
d x
d y
(a)
(b)
(d)
(c)
(e)
Figure 8.19. Planar array grids. (a) Rectangular; (b) Rectangular with circular
boundary; (c) Circular; (d) Concentric circular; and (e) Hexagonal.
 
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