GW Instek GRF-3300 Series Student Manual - Manual (Page 10)

GRF-3300 Manual
3 318
Let’s start from the Z
l
sections which are capacitor sections including g1, g3, g5
and g7. By using the microstrip line calculation tool, when the line width is 5mm, Z
l
=
29.67
:, wavelength O =78.847mm. According to 16-22, the first capacitor value is:
g1=C1=0.4450
We get
E
L
1
=C
1
Z
l
/Ro
=0.4450*29.67/50
=0.264 rads (16-23)
Combining 16.8 and 16.23, the line length of
L
1
and
L
7
are:
L
1
=0.264/
E
=0.264/(2
S/O)
=0.264/(2
S/78.847)
=3.31 mm.
By the same method, section 3 is:
E
L
3
=1.069 rads
L
3
=
L
5
=13.4 mm.
The Z
h
(inductor) sections are also designed by the same method. By using the
calculation tool, Z
h
=101.73
: and wavelength O = 86.087mm when the line width is
0.5mm. According to 16-21:
g2=L2=1.2470
We get