- - - - - -
BÀI GIÀNG: Bức xạ của
Dipole điện
1
Telecommunications Program
Telecommunications Program
Anten
+ BcxcaDipole đin
(
)
()
,
,
sinsin
0
R
jkii
ee
V
eee
zzz
eee
z
e
GJedV
GGiIli
GGIl
G
ρ
ρ
θ
ϕ
θϕ
θϕ
θθ
=
==
==−
=
rr
r
r
rrr
-KháinimDipole đin
-mbcx
sin
4
0
jkR
e
jke
R
E
θθ
ϕ
θ
π
=
=
r
r
r
-Trườngbcx
z
z
x
y
R
i
r
i
ϕ
r
i
θ
r
θ
ϕ
2
l
2
l
R
e
I
e
I
2
Telecommunications Program
Telecommunications Program
Anten
+ BcxcaDipole đin(tt)
-mphươnghướng
0
sin
4
jkR
e
H
jke
HIli
R
θ
ϕϕ
θ
π
=
=
r
r
r
(
)
,sin
ee
fWGiWIli
θθθ
θϕθ
==−
r
rr
(
)
,sin
e
fWIl
θϕθ
=
.sin
2
.sin
2
jkRe
jkRe
eWIl
Eji
R
eIl
Hji
R
θθ
ϕϕ
θ
λ
θ
λ
=
=
r
r
r
r
(
)
()
,sin
,
F
Fconst
θ
ϕ
θϕθ
θϕ
=
=
3
Telecommunications Program
Telecommunications Program
Anten
+ BcxcaDipole đin(tt)
-Cutctrường
-Nhnt:
Phâncc
MtphngE, mtphngH
-Đồ thbcx
Trường đinTrườngt
MtphngE
MtphngH
z
θ
y
ϕ
x
4
Telecommunications Program
Telecommunications Program
Anten
+ BcxcaDipole đin(tt)
-Côngsutbcx
θ
ϕdϕ
dθ
I
e
x
z
y
dS
2
0
1
2
bxtb
dPdSEdS
W
=Π=
2
2
2
0
00
2
22
2
030
0
2
2
2
sin
2
sin
43
40
bx
e
e
e
E
PRdd
W
WI W
ll
dI
l
I
ππ
π
θθϕ
ππ
θθ
λλ
πλ
=

==



=

∫∫