NINA-B1 series - System Integration Manual
UBX-15026175 - R06
Appendix
Page 44 of 48
B
Antenna reference designs
Designers can take full advantage of NINA-B1’s
Single-Modular Transmitter certification approval
by integrating
the u-blox reference design into their products. This approach requires compliance with the following rules:
•
Only listed antennas can be used. Refer to
NINA-B1 series Data sheet [2]
for the listed antennas.
•
Schematics and parts used in the design must be identical to u-blox. RF components may show
different behavior at the frequencies of interest due to different construction and parasitic, use u-blox’s
validated parts for antenna matching.
•
PCB layout must be identical to the one provided by u-blox, please implement one of the reference
designs included in this section or contact u-blox.
•
The designer must use the stack-up provided by u-blox. RF traces on the carrier PCB are part of the
certified design.
The available designs are presented in this section.
B.1 Reference design for external antennas (U.FL connector)
When using the NINA-B111 together with this antenna reference design, the circuit trace layout must be made
in strict compliance with the instructions below.
All the components placed on each RF trace must be kept as indicated in the reference design. The reference
design uses a micro coaxial connector that is connected to the external antenna via a 50
Ω
pigtail.
Figure 16: Antenna reference design embedded on a host carrier PCB
