3.2 Reflection Coefficient
127
Figure 3.2-2 Reflection coefficient when transmission line's physical length , electrical length =0ι ι, =100Ω
Figure 3.2-3 Reflection coefficient when transmission line's physical length , electrical length =180ι, =100Ω
In a similar fashion we can work out that the electrical length for a line is 90ιሺFigure
3.2-4ሻ and that this line gets the reflection coefficient to rotate 180ι around the polar plot (Figure
3.2-5).
Note that this rotation is in the clockwise direction and that this comes from the negative sign of the
exponent in equation (3.2-4).
0
15
30
45
60
75
90
105
120
135
150
165
-180
-165
-150
-135
-120
-105
-90
-75
-60
-45
-30
-15
Graph 1
Swp Max
1000 MHz
Swp Min
1000 MHz
Mag Max
1
0.2
Per Div
1000 MHz
Mag 0.3333
Ang 0 Deg
S(1,1)
Schematic 1
0
15
30
45
60
75
90
105
120
135
150
165
-180
-165
-150
-135
-120
-105
-90
-75
-60
-45
-30
-15
Graph 1
Swp Max
1000 MHz
Swp Min
1000 MHz
Mag Max
1
0.2
Per Div
1000 MHz
Mag 0.3333
Ang 0 Deg
S(1,1)
Schematic 1
Conquer Radio Frequency
127 www.cadence.com/go/awr
