M-Network.ppt
Download
Report
Transcript M-Network.ppt
Microwave Network Analysis
For TEM transmission line, voltage and current can be uniquely
Defined as:
V E d
V
, I H d , Z0
I
C
For non - TEM lines, the equivalent voltage and current
are defined by :
Voltage and current are defined for a particular mode,
voltage is proportion al to the transvers e electric field
current is proportion a; to the transvers e magnetic field.
1
Power VI *
2
V
Z for a single travellin g wave
I
Et ( x, y, z ) e ( x, y )( A e jz A e jz )
e ( x, y ) jz
(V e
V e jz )
C1
H t ( x, y, z ) h ( x, y )( A e jz A e jz )
h ( x, y ) jz
(I e
I e jz )
C2
zˆ e ( x, y )
h ( x, y )
Zw
V ( z ) (V e jz V e jz )
I ( z ) I e jz I e jz
V V
Z0
I
I
I
I
C 2
A
A
1
P A
2
2
*
V
I
*
*
ˆ
e
h
.
z
ds
e
h
.zˆds
*
S
2C1C2 S
C1C2* e h * .zˆds
S
V V C1
Z0
Z w ( ZTE or Z TM ) 1
I
I
C2
The general field can be expressed as:
N
en ( x, y ) jz
jz
Et ( x, y, z )
(Vn e
Vn e )
C1n
n 1
N
hn ( x, y ) jz
H t ( x, y , z )
(I n e
I n e jz )
C2 n
n 1
The concept of Impedance