QUEST tool example one
Beam shaping
Figure 1 shows the excitation of a linear array antenna with a half wavelength element spacing (i.e., ) and four elements of amplitude , , , .
Figure 1 Geometry of the problem
1. Find the position of the pattern nulls.
The nulls are at
2. Modify the elements voltage excitations so that the pattern has nulls at -45° and 30°.
Let the amplitude of the i-th element voltage excitation
3. Sketch the original and new array factors as a function of γ.
Original array factor
New array factor
Score = 0/4
) and four elements of amplitude ,
,
,
.
Geometry of the problem
