Ublox NINA-B3 Series System Integration Manual page 69

Reference Item
S Spacing
W Conductor width
T Copper and plating/surface
coating thickness
H Conductor height
Dielectric constant
ε
r
(relative permittivity)
Table 16: Coplanar micro-strip specification
☞
The GND spacing requirements of the NINA ANT and U.FL connector RF pins are greater than the
spacing requirement of a 50 Ω coplanar micro-strip. However, at the conductor width and height
specified in Table 16
significantly for short trace lengths. Therefore, the impedance will still be close to 50 Ω.
Figure 33: RF trace and minimum required GND trace of the U.FL antenna connector reference design. Dimensions are
shown in mm.
UBX-17056748 - R13
C1-Public
Value
200 +/- 50 μm
300 +/- 30 μm (match as close to 50 Ω as possible)
35 +/- 15 μm
150 +/- 20 μm
3.77 +/- 0.5 @ 2 GHz
the increased spacing to GND does not affect the trace impedance
Appendix
NINA-B3 series - System integration manual
Page 69 of 72