PE42723
SPDT RF Switch
High Frequency Performance with External Matching
High frequency insertion loss and return loss can be improved by inductive matching on the RF ports in the
customer application board layout. Figure 12 is a matching network using a 2.2 nH inductor on each RF port.
The inductor needs to be placed as close to the device under test (DUT) as possible. Figure 13–Figure 15
show the insertion loss and return loss improvement using a 2.2 nH inductor on RFC port and a 2.2 nH on RF1,
RF2 and RFC ports, respectively.
Figure 12 • PE42723 Matching Network
DUT
L = 2.2 nH
L = 2.2 nH
SPDT
PE42723
RF1
RF2
L = 2.2 nH
RFC
Figure 13 • Insertion Loss (RFC–RFX) With or Without Matching(*)
No Matching
RFC Matched Only
All RF Ports Matched
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
-0.9
-1
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Frequency (GHz)
Note: * For reference only.
DOC-64524-5 – (01/2016)
Page 11
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