SWRS205F March 2017 ā December 2024 CC3120MOD
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The RF signal from the device is routed to the antenna using a Coplanar Waveguide with ground (CPW-G) structure. CPW-G structure offers the maximum amount of isolation and the best possible shielding to the RF lines. In addition to the ground on the L1 layer, placing GND vias along the line also provides additional shielding. Figure 9-4 shows a cross section of the coplanar waveguide with the critical dimensions.
Figure 9-4 Coplanar Waveguide (Cross
Section)Figure 9-5 shows the top view of the coplanar waveguide with GND and via stitching.
Figure 9-5 CPW With GND and Via Stitching
(Top View)The recommended values for the PCB are provided for 2-layer boards in Table 9-4 and 4-layer boards in Table 9-5.
| PARAMETER | VALUE | UNIT |
|---|---|---|
| W | 24.5 | mils |
| S | 6.5 | mils |
| H | 42.1 | mils |
| Er (FR-4 substrate) | 4.8 |
| PARAMETER | VALUE | UNITS |
|---|---|---|
| W | 21 | mils |
| S | 10 | mils |
| H | 16 | mils |
| Er (FR-4 substrate) | 4.5 |