NINA-B1 series - System integration manual
UBX-15026175 - R16
Appendix
Page 53 of 63
C1-Public
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]
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 33: Antenna reference design embedded on a host carrier PCB
