April 2010
Beginner to intermediate
534 pages
12h 56m
English
Content preview from Antenna Arrays: A Computational Approach
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5 Nonplanar Arrays
Array elements usually lie in a plane, because the feed network for nonplanar array is more complicated. In addition, placing array elements on a curved surface complicates design, construction, and testing. A nonplanar array, like the one in Figure 5.1, with elements distributed in three-dimensional space has an array factor given by
where
u = sinθ cos
us = sinθs coss
v = sinθ sin
vs = sinθs sins
u2 + v2 = sin2θ(sin2 + cos2) ≤ 1
θs = elevation steering angle
s = azimuth steering angle
A conformal array has the (xn, yn, zn) lying on a curved surface. The maximum gain of a ...
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