SL1925
Preliminary Information
100Ω
1kΩ
15pF
Figure 3 Baseband output load condition
1T379 6.15MM STRIPLINE
1kΩ
1T379 6.15MM STRIPLINE
6
Tanks
"vcos"
7
Tanksb
Vcnt
BB811
9MM STRIPLINE
9
Tankv
"vcov"
Tankvb
BB811
1kΩ
9MM STRIPLINE 10
Note: Stripline width =0.44mm,dimensions are approximate.
Figure 4 Local oscillator application circuit
+j1
+j0.5
+j2
Marker
+j0.2
+j5
Freq (MHz)
950
1350
1750
2150
Zreal
Ω
Zimag
Ω
90
76
63
46
-18
-15
-35
-29
1
2
0
0.2
0.5
1
1X
X2
X3
2
5
X
3
4
X
4
–j0.2
–j5
–j0.5
–j2
–j1
START 700
MHz
Normalised to 50Ω
STOP 2 500
MHz
Figure 5 Converter RF input impedance (typical)
4