SWRS349A June 2026 – July 2026 CC2340R5MODA
PRODUCTION DATA
It is critical that the RF section be laid out correctly to make sure optimal module performance. A poor layout can cause low-output power and sensitivity degradation. Figure 9-2 shows the RF placement and routing of the CC2340R5MODA module with the 2.4-GHz integrated antenna.
Figure 9-2 Module Layout
GuidelinesFollow these RF layout recommendations for the CC2340R5MODA module when using the integrated Antenna:
Dimensions A, B & C in Figure 9-2 should be at least 20mm for optimal antenna efficiency. These dimensions can be reduced for compact layout designs but then the antenna efficiency will be reduced. With A and B dimensions at 20mm, the antenna efficiency will be around 50%. If A and B are reduced to 15mm; then the expected antenna efficiency will be around 25%. If A and B are reduced to 10mm; then the expected antenna efficiency will be around 10%. It is not recommended to have A or B dimensions less than 10mm.
Components Z60, Z61 & Z62 are for antenna matching purposes. The optimum antenna match values for Z60, Z61 & Z62 will be dependent on the layout, final product casing and material, and size of the GND plane. For the Launchpad ref design, Z60: DNM, Z61: 0 ohm & Z62 is 1pF. It is always recommended to use a pi-filter (Z60, Z61 & Z62) for the antenna matching for flexibility to match the antenna and to minimize mismatch losses.