SARA-R5 series - System integration manual
UBX-19041356 - R04
Design-in
Page 62 of 118
C1-Public
2.4.2.3
Antenna trace design used for SARA-R5 series
modules’ type approval
s
The conformity assessment of u-blox SARA-R5 series LGA surface-mounted modules for regulatory
type approvals such as FCC United States, ISED Canada, RED Europe, etc. has been carried out with
the SARA-R5 series modules mounted on a u-blox host printed circuit board with a 50
grounded
coplanar waveguide designed o
n it, herein referenced as “antenna trace design”, imp
lementing the
connection of the
ANT
LGA pad of the module, consisting in the cellular RF input/output of the
module, up to a dedicated 50
SMA female connector, consisting in the cellular RF input/output of
the host printed circuit board for external antenna and/or RF cable access.
☞
Manufacturers of mobile or fixed devices incorporating SARA-R5 series modules are authorized to
use the FCC United States Grants and ISED Canada Certificates of SARA-R5 series modules for
their own final host products if, as per FCC KDB 996369, the antenna trace design implemented
on the host PCB is electrically equivalent to the antenna trace design implemented on the u-blox
host PCB used for regulatory type approvals of SARA-R5 series modules, described in this section.
☞
In case of antenna trace design change, an FCC Class II Permissive Change and/or ISED Class IV
Permissive Change application is required to be filed by the grantee, or the host manufacturer can
take responsibility through the change in FCC ID and/or the ISES Multiple Listing (new application)
procedure followed by an FCC C2PC and/or ISED C4PC application.
The antenna trace design is implemented on the u-blox host PCB as illustrated in
, using the
parts listed in
, with the support of the additional optional antenna detection capability.
Guidelines to design a proper equivalent optional antenna detection circuit on a host printed circuit
board are available in section
u-blox host PCB
SARA-R5 series
56
ANT
62
ANT_DET
R1
C1
D1
L1
C2
J1
Z
0
= 50
Ω
Z
0
= 50
Ω
GND
L2
Figure 37: Antenna trace design implemented on the u-blox host PCB, with additional antenna detection circuit
Reference
Description
Part number - Manufacturer
C1
27 pF capacitor ceramic C0G 0402 5% 50 V
GRM1555C1H270JA16 - Murata
C2
33 pF capacitor ceramic C0G 0402 5% 50 V
GRM1555C1H330JA16 - Murata
D1
Very low capacitance ESD protection
PESD0402-140 - Tyco Electronics
L1
68 nH multilayer inductor 0402 (SRF ~1 GHz)
LQG15HS68NJ02 - Murata
R1
10 k
resistor 0402 1% 0.063 W
Generic manufacturer
J1
SMA connector 50
through hole jack
SMA6251A1-3GT50G-50 - Amphenol
L2
39 nH multilayer inductor 0402 (SRF ~1 GHz)
Not Installed
Table 21: Parts in use on the u-blox host PCB for the antenna trace design, with additional antenna detection circuit