AN930.2: EFR32 Series 2 2.4 GHz Matching Guide
For information on PCB layout requirements for proper 2.4 GHz operation, refer to application note, AN928.2: EFR32 Series 2 Layout Design Guide.
●KEY POINTS:
■Description of the applied 2.4 GHz matching networks and techniques for the EFR32 Series 2 devices
■Detailed discussion of the design steps and design examples
■Measured TX fundamental and harmonic performance
■Measured receive sensitivity values
This application note is intended to help users achieve the best 2.4 GHz RF match for targeted applications. It describes the details of matching network design procedures and presents additional test results.
●Thorough derivations of four different matching options are presented for EFR32xG21:
■4-element discrete LC match for up to 0 dBm power levels
■3-element discrete LC match for up to +10 dBm power levels
■5-element discrete LC match for up to +20 dBm power levels
■4-element combined discrete LC match for both +10 and 0 dBm power levels
A 4-element discrete LC match for up to +6 dBm power levels is also presented for EFR32xG22.
The 4x4 mm, 32-pin 2.4 GHz-only version's package pinouts are shown in the figures below for each EFR32xG21 and EFR32xG22 part. The 2.4 GHz RF IO pins are highlighted with a red box.
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