Specifications

EMMY-W1 Antenna reference design
UBX-16015910 Page 11 of 12
locate, communicate, accelerate
7 NFC reference design
This section describes the available design for the NFC coil antenna of the EMMY-W1 modules.
Figure 7: Reference schematic for NFC coil antenna
7.1 Internal antenna
The reference design uses a NFC coil antenna designed by u-blox.
7.1.1 Bill of materials
Reference
designator
Description Manufacturer P/N
J6 Pin Header, Pitch 2.54mm, 1x4 Way, Through Hole Samtec TSW-104-07-G-S
C10 Do Not Place - -
C11 CAP, CER, 220pF, 5%, NP0, 50V, SMD 0402 Murata GRM1555C1H221JA01
C12 CAP, CER, 820pF, 5%, NP0, 50V, SMD 0402 Murata GRM1555C1H821JA01
C13 Do Not Place - -
C14 CAP, CER, 820pF, 5%, NP0, 50V, SMD 0402 Murata GRM1555C1H821JA01
C15 Do Not Place - -
7.1.2 NFC coil characteristics
Parameter Low band Unit
Frequency Range 13.56 MHz
Number of turns 4 -
Trace width 0.4 mm
Trace spacing (edge to edge) 0.4 mm
Dimensions (L x W) 30 x 30 mm