NORA-W2 series - Hardware integration manual
UBX-22005177 - R01
Design-in
Page 17 of 61
C1
–
Public
Figure 4: Example of RF trace and ground design from NORA-W2 Evaluation Kit (EVK)
3.2.3
NORA-W251AWS
NORA-W251AWS is suited for designs when an external antenna is needed due to mechanical
integration or placement of the module.
Designers must take care of the antennas from all perspective at the beginning of the design phase
when the physical dimensions of the application board are under analysis/decision, as the RF
compliance of the device integrating NORA-W251AWS module with all the applicable required
certification schemes heavily depends on the radiating performance of the antennas. The designer is
encouraged to consider one of the u-blox suggested antenna part numbers and follow the layout
requirements.
3.2.3.1
RF connector design
If an external antenna is required, the designer should consider using a proper RF connector. It is the
responsibility of the designer to verify the compatibility between plugs and receptacles used in the
design.
suggests several RF connector plugs that can be used by the designers to connect RF coaxial
cables based on the declaration of the respective manufacturers. The Hirose U.FL-R-SMT RF
receptacles (or similar parts) require a suitable mated RF plug from the same connector series. Due
to wide usage of this connector, several manufacturers offer compatible equivalents.
Manufacturer
Series
Remarks
Hirose
U.FL® Ultra Small Surface Mount Coaxial Connector Recommended
I-PEX
MHF® Micro Coaxial Connector
Tyco
UMCC® Ultra-Miniature Coax Connector
Amphenol RF
AMC® Amphenol Micro Coaxial
Lighthorse Technologies, Inc. IPX ultra micro-miniature RF connector
Table 5: U.FL compatible plug connector
