The reference circuitry schematic shows the dual antenna application schematic.
Figure 1. Reference circuitry schematic for dual antenna
The following table lists the recommended and tested component types and values.
| Designator | Value | Description | Footprint |
|---|---|---|---|
| C1, C3, C5 | 1.0 pF | Capacitor, NP0, ±0.05 pF | 0201 |
| C2, C4 | 2.0 pF | Capacitor, NP0, ±0.05 pF | 0201 |
| C6 | 100 nF | Capacitor, X5R, ±10% | 0201 |
| C7 | 10 µF | Capacitor, X5R, ±20% | 0603 |
| L1, L3 | 1.9 nH | High frequency chip inductor, ±0.1 nH, 120 mΩ | 0201 |
| L2, L4 | 3.0 nH | High frequency chip inductor, ±0.1 nH, 120 mΩ | 0201 |
| R1 | 33 kΩ | Resistor, ±1% | 0201 |
| U1 | nRF21540-QDAA | Radio front-end/range extender for 2.4 GHz | QFN-16 |