Note that the first term in (5) is simply the conventional array factor seen in the array theory
. The last term is of significance since it shows that the radiation beampattern of the array depends on both the range and frequency increment.
Kummer, "Basic array theory
," Proceedings of the IEEE, vol.
The previously mentioned (1) and (2) are the classical picture of antenna array theory
, where the resulting array factor is a function of [theta] and [phi] only.
De Natale, "Planar antenna array control with genetic algorithms and adaptive array theory
," IEEE Trans.
As expected by the array theory
, Figure 8 shows that the main beam amplitude decreases when moving away from the broadside direction.
With this rather broad scope, the course is valuable both for those interested in phased array theory
and technology itself and also for the system engineer, project manager and radar operator concerned with both benign and electronically hostile conditions.
shows that to avoid ripples in the pattern at the test area the elements must be closer to each other to approximate the pattern of an isotropic radiator.
Mailloux, "Phased Array Theory
and Technology," Proc.
In simplest terms, array theory
works on the principle that each antenna element is treated as an individual isotropic point source.
The corresponding far-field pattern along the array plane, illustrated in Figure 9, shows a main lobe properly pointing at an angle approximately equals 5[degrees], as imposed by the array theory