Appendix 2. 2.4 GHz RF Network Schematics and Technical Data
Four 2.4 GHz matching topologies are presented here:
• A ladder two-element LC match up to 10 dBm power levels
• A ladder four-element LCLC match up to 20 dBm power levels
• A low-cost hybrid type applying both discrete elements and a transmission line (LC-Tline-C) up to 20 dBm power levels
• A low-cost parallel LC match for up to 13 dBm power levels
The schematics of the above matches are given in Figures B1 through B4. All matches use GRM1555 type SMD capacitors from Mura-
ta. The ladder two-element and four-element matches use film-type LQP15MN series inductors, while the hybrid Tline and parallel LC
matches apply low-cost, multilayer LQG15HS series inductors from Murata. In the figures, the 50 Ω antenna side load is denoted by Z
L
,
while the impedance shown at the IC side is denoted by Z
IN
. The generator represents the PA.
B1. Ladder 2-element LC Match Schematic
B2. Ladder 4-element LCLC Match Schematic
B3. Hybrid LC-Tline-C Match Schematic
B4. Parallel LC Match Schematic
AN930: EFR32 2.4 GHz Matching Guide
2.4 GHz RF Network Schematics and Technical Data
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