STW81103 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STW81103' PDF : 53 Pages View PDF
Application information
STW81103
A first solution to combine the differential outputs is the lumped LC type balun tuned in the
2 GHz band (Figure 32).
Figure 32. LC lumped balun for divided by 2 output (MATCH_LC_LUMP_2G.dsn)
Vcc
50 ohm
RFOUTP
2.7nH
2pF
2.7nH
2pF
3pF
2.7nH
3nH
RFOUTN
2pF
50 ohm
2.7nH
2pF
50 ohm
Vcc
The same recommendation for the SMD components also applies to the divided by 2 output.
Another topology suited to combining the two outputs for the divided by 2 frequencies is
represented in Figure 33.
Figure 33. Evaluation board (EVB2G) matching network (MATCH_EVB2G.dsn)
Vcc
50 ohm
RFOUTP
RFOUTN
50 ohm
5.5nH
22pF
2:1
22pF
22pF
1.9nH
1.2pF
50 ohm
5.5nH
Vcc
44/53
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