SWRA640H December 2018 – May 2024 CC1310 , CC1312R , CC1314R10 , CC1350 , CC1352P , CC1352R , CC1354P10 , CC1354R10 , CC2620 , CC2630 , CC2640 , CC2640R2F , CC2640R2F-Q1 , CC2642R , CC2642R-Q1 , CC2650 , CC2652P , CC2652R , CC2652R7 , CC2652RB , CC2652RSIP , CC2674P10 , CC2674R10
The matching environment for optimum performance is determined through a combination of load- and source-pull measurements, given as a terminating load/source impedance. This requires comprehensive measurements to characterize the nonlinear response of the RF front-end.
The parameters considered include:
The operating conditions considered include:
Additionally, the effect of temperature variation on TX/RX performance must also be considered.
These impedance locations are typically located in different regions of the Smith chart and a design space giving the best tradeoff between TX and RX performance is identified for a given set of operating conditions.
The identified target impedance(s) can also be highly dependent on the power and ground planes of the application circuit as well as accurate measurement system calibration, along with the effects of differential and common current components due to the PCB layout. Whilst detailed simulations of the PCB using EDA tools can add confidence to a design, simulation inaccuracies (such as component models) add additional errors that can be difficult to account for.
Due to the number of parameters that must be considered and amount of testing required for a robust design, it is strongly recommended to follow the reference design.