Analog Devices ADRV9001 User Manual page 249

Reference Manual ADRV9001
RF PORT INTERFACE INFORMATION
Figure 225. Differential Receiver Port and Laminate
Add traces and components to emulate the matching network being implemented with various ADS trace blocks, like MLINE, or with a
simulated S parameter block from the layout Gerber files. A simulation of the board files is more accurate to include different trace lengths or
curves.
Calculating the reflection results is the final step. Given the setup being used with three individual terms, two on the differential Rx port, use the
following equations to get the single-ended equivalent responses. Note: In this case, the receiver port terms are numbered 1 and 3, and the
single-ended output term is number 3.
Figure 226. Reflection Result Calculations
Figure 227. ADS Simulation Results of Return Loss Curve
S parameters shown in Figure 227 are an example, and the actual results depend heavily on the response of the chosen balun. Add shunt and
series matching components with short TLs to represent possible PCB traces associated with these matching components on the single side of
the balun.
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