Download - 第四章Patch 天線設計
-
4-1
Patch
4-1
Patch
Patch
LW 1950 1955
1970 4-1
Patch
4-1 Patch
Patch 4-2
4-2 Patch
-
4-2
Patch
MMIC(Monolithic microwave integrated circuit)
Q( 100)
(poor polarization purity)
(Q
WBW 0= )
4-2
patch
(transmission line model)(cavity model)(full-wave
analysis)
(1)
patch
(2)
E H H (Perfect magnetic
wall)(PMC) patch PMC
(3)
-
4-3
FEKOIE3DEnsemble Momentum
FEKO
(Full wave analysis)
patch (Low-profile antenna)
Patch
Patch
Patch Patch
()
patch
4-3 W L
(W )
TM
4-5
1979 (Cavity model) Patch
(close proximity)
E H H
z
H H
-
4-4
(PMC)(Perfect electric wall)
TM
(Slot antenna)
Patch [1] Patch
Patch
(a)
(Fringing field)(Fringing effect)
4-3 4-4
Patch Patch Wh
W/h r L/h>>1
W
Patch
4-3
-
4-5
4-4
4-5 (
)(Inhomogeneous
media) 4-5
W/h>>1 r >>1
4-6
eff [1]
4-5 4-6
(b)
Patch
()
r h
-
4-6
()
(1) Patch WL
[1] W
1
221
22
1 000 +
=+
=rrrr ff
w
(4-1)
0 (free-space)
(2) W reff
wh
rrreff /121
12
12
1+
+
+=
(4-2)
(3)(4-3) 4-7 L
+
++
=
8.0)258.0(
264.0)3.0(412.0
hw
hw
hL
reff
reff
(4-3)
(4) L effL
LLLeff += 2
(5)
( )( )
0010
0
12 2 2r reff reff r
fL L L
= =+
(4-4)
(4-4)TM
(4-3) L
Lf
Lreffr
= 22
1
00 (4-5)
-
4-7
LL
4-7
()
patch
4-7 (Radiating slot)
4-8
(slot)[1]
111 jBGY +=
W
( )
= 20
01 24
11120
hkWG
101
0