Graphics Programs Reference
In-Depth Information
It follows that once a scattering matrix is specified, the target backscattered
RCS can be computed for any combination of transmitting and receiving polar-
izations. The reader is advised to see Ruck for ways to calculate the scattering
matrix
[]
.
Rewriting Eq. (11.20) in terms of the different possible orthogonal polariza-
tions yields
E
s
E
s
E
i
E
i
s
HH
s
HV
=
(11.21)
s
VH
s
VV
E
s
E
s
E
i
E
i
s
RR
s
RL
=
(11.22)
s
LR
s
LL
By using the transformation matrix in Eq. (11.17), the circular scattering
elements can be computed from the linear scattering elements
[]
s
RR
s
RL
s
LR
[]
s
HH
s
HV
s
VH
10
0
1
[]
1
=
(11.23)
s
LL
s
VV
and the individual components are
s
VV
+
s
HH
js
HV
(
+
s
VH
)
s
RR
=
----------------------------------------------------------------
2
s
VV
++
2
s
HH
js
HV
(
s
VH
)
s
RL
=
-----------------------------------------------------------
(11.24)
s
VV
+
s
HH
js
HV
(
s
VH
)
s
LR
=
-----------------------------------------------------------
2
VV
++
2
s
HH
js
HV
(
+
s
VH
)
s
LL
=
---------------------------------------------------------------
Similarly, the linear scattering elements are given by
s
HH
s
HV
s
RR
s
RL
10
01
[]
1
=
[]
(11.25)
s
VH
s
VV
s
LR
s
L
L
and the individual components are
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