Ansoft Designer

The Principle of Direction_Finding
• The electric field of “incident wave” at the various
antennas is as follows:
E
jIl sin θ k
4π
ωε
× k
r
θ i =
exp( − jkr i)
i = (1,2,3,4 )
i
E
θi
=
E ( r 0)
exp( − jkr i)
• The propagating path differences between various
antennas by the “incident wave”
φ
φ
12
34
2πD
= sinϕ
cosϑ
λ
2πD
= cosϕ
cosϑ
λ
D—length of the baseline, —wavelength ,—the elevation
of “incident wave”,—the azimuth of “incident wave”