Continental Refrigerator FE4RW0110 Guide

FE4RW0110
OEM Manual and User Guide v 4.2
(to be used for certification)
FCC ID: LHJ-FE4RW0110

Terms and Acronyms
CDMA
Code Division Multiple Access
UMTS
Universal Mobile Telecommunication System
WCDMA
Wideband Code Division Multiple Access
LTE
Long Term Evolution
LTE-A
LTE-Advanced
GLONASS
GLObalnaya NAvigatsionnaya Sputnikovaya Sistema
GNSS
Global Navigation Satellite System
DCM-TCU
Data Connectivity Module
DRX
Discontinuous Reception
ES
Engineering Sample
FDD
Frequency Division Duplex
GPIO
General Purpose Input Output
GSM
Global System for Mobile
HU
USB host
HSIC
High Speed Inter-Chip
PCIe
Peripheral Component Interconnect Express
MP
Mass Production
NAD
Network Access Device
OEM
Original Equipment Manufacturer
PCB
Printed Circuit Board
PHY
Physical Layer
SIM
Subscriber Identity Module
TDD
Time Division Duplex
TSP
Telematics Service Provider

FE4RW0110
The FE4RW0110 NAD is proprietary embedded module designed by Continental Automotive Systems,
Inc. The modules will be integrated into Data Connectivity Modules (DCM-TCUs) or USB hosts (HUs)
designed and produced by Continental or by a 3rd party for use by automotive OEMs. DCM-TCUs will
be installed into vehicles during the OEM’s factory assembly process and will not be accessible without
use of special tools. Primary use-cases are data-centric with data and voice connections to Telematics
Service Providers (TSP).
1Key Features
Air Interface Support
•LTE FDD: 3GPP Rel 14
•LTE FDD: DL Category-9 / UL Category-5
•UMTS: HSUPA CAT6 (up to 5.76-Mbps), HSPA CAT14 (up to 21-Mbps) or HSPA CAT24 (up to 42-
Mbps) depending on configuration
•VoLTE –HD Voice
•Embedded Qualcomm GNSS Sub-system, Gen9v2
•GPS, Glonass, Beidou, Galileo Receiver
•SBAS supported: EGNOS/MSAS/QZSS/WAAS/GAGAN
•Able to track ~40 channels simultaneously
2Regulatory Compliance Notes
Europe:
Hereby, Continental Automotive Systems, Inc, declares that the radio equipment type FE4RW0110 is in
compliance with Directive 2014/53/EU. The full test of the EU Declaration of Conformity is available at
the following internet address:
https://www.continental-homologation.com/en-gl/General-Motors
FCC:
This device complies with Part 15, Part 22(H), Part 24(E) and Part 27 of the FCC Rules. The FCC ID for
this device is LHJ-FE4RW0110. Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference that may cause undesired
operation.
Material Statement:
The End of Life Vehicle Directive (EVL) must be applied to the FE4RW0110 module. This means that
the component is included into the overall vehicle (since it is permanently installed) and if the explanation
of the materials used and, if applicable, disposal descriptions from the vehicle manufacturer.

3Device Installation and User Manual
The FE4RW0110 modules are proprietary product designed and manufactured by Continental
Automotive Systems, Inc. for integration into telematics control units manufactured by Continental
Automotive Systems, Inc.
I. The module is limited to installation ONLY in an integrated device manufactured by Continental
Automotive Systems, Inc.
II. During manufacturing process of the integrated device, the module is soldered onto the pcb of the
integrated device.
III. The integrated device must provide RF connectors to external antennas or RF traces to connect the
FE4RW0110 modules to antennas inside the integrated device. The typical reference design for
the RF trace layout, including pcb stack-up and trace length is described in Section 6 of this
document.
IV. Automotive OEM is responsible for ensuring that the end-user has no manual instructions to
remove or install module.
V. The module is limited to installation in mobile applications, according to Part 2.1091(b).
VI. No other operation configurations are allowed.
VII. Changes or modifications to this system by other than a facility authorized by Continental could
void authorization to use this equipment.
VIII. The module does not have a pre-defined antenna. The module must be installed to provide a
separation distance of at least 20 cm from all persons and antenna. Under No conditions may an
antenna gain be used that would exceed the ERP and EIRP power limit as specified in Part 22,
Part 24 and Part 27.
IX. The module must be installed to provide a separation distance of at least 20 cm from all persons
and antenna and must not be co-located or operate in conjunction with any other antenna or
transmitter, except in accordance with FCC multi-transmitter evaluation procedures as
documented in this filing. Additional testing and certification for SAR will be required if the
distance limitation cannot be met.
X. The integrator is responsible for fulfilling FCC and IC requirements for the integrated device. The
module must be installed to provide a separation distance of at least 20 cm from all persons and
antenna. SAR is related to the final product’s implementation and should be assessed based on its
proximity to human body.
If Continental chooses to re-use modular approval, then the TCU shall be clearly labeled with an external
label containing the integrated modem’s FCC ID. For example, the label can include text “Contains
device with FCC ID: LHJ-FE4RW0110”.

4Antenna requirements for use with FE4RW0110 modules:
•The FE4RW0110 modules are for use with external antennas ONLY.
•Based on FCC OET Bulletin 65 Supplement C and 47 CRF §2.1091, for all standalone
LTE/WCDMA/GSM operations the maximum antenna gain including cable loss shall not exceed
the following values:
oGSM850: 4.5 dBi
oGSM1900: 2.5 dBi
oUMTS Band II: 2.5 dBi
oUMTS Band IV: 5.5 dBi
oUMTS Band V: 4.5 dBi
oLTE Band 2: 2.5 dBi
oLTE Band 4: 5.5 dBi
oLTE Band 5: 4.5 dBi
oLTE Band 7: 9.0 dBi
oLTE Band 38: 9.0 dBi
oLTE Band 41: 9.0 dBi
•This radio transmitter (FCC ID: LHJ-FE4RW0110) has been approved by FCC to operate with
the antenna types listed below with the maximum permissible gain indicated. Antenna types not
included in this list, having a gain greater than the maximum gain indicated for that type, are
strictly prohibited for use with this device.
•Based on EN 62311;2020 and EN 50665:2017, for all standalone LTE/WCDMA/GSM operations
the maximum antenna gain including cable loss shall not exceed the following values:
oGSM900: 6.5 dBi
oGSM1800: 11.5 dBi
oUMTS Band 1: 12.0 dBi
oUMTS Band 3: 11.5 dBi
oUMTS Band 8: 6.5 dBi
oLTE Band 1: 12.0 dBi
oLTE Band 3: 11.5 dBi
oLTE Band 7: 13.0 dBi
oLTE Band 8: 6.5 dBi
oLTE Band 20: 9.0 dBi
oLTE Band 28: 8.0 dBi
oLTE Band 38: 13.0 dBi
oLTE Band 40: 13.0 dBi
5Instructions to OEMs:
Continental must instruct the automotive OEM and provide them to include the following information
into the car user’s manual:

1. End-users must be provided with transmitter/antenna installation requirements and operating
conditions for satisfying RF exposure compliance:
2. A separate section should clearly state “FCC RF Exposure requirements:”
3. Required operating conditions for end users.
4. The antenna used with this device must be installed to satisfy RF exposure compliance. The
antenna gain, including cable loss, must not exceed values listed above.
5. Under no conditions may an antenna gain be used that would exceed the ERP and EIRP power
limits as specified in Parts 15, 22H, 24E, and 27.
6. Clear instructions describing the other party’s responsibility to obtain station licensing.
6Layout and Routing Recommendations
6.1 Module Specific
The pad spacing of 0.7mm should allow the placement of a 450um finished VIA between pads, while
maintaining a 125um via-to-trace or via-to-pad spacing, to facilitate the breakout of inner row
signals. The 0.7mm spacing is also large enough to route two 160um (6mil) traces between pads.
Figure 1: Vias placed between Pads
6.2 RF Traces for antennas
The NAD has eight antenna pins.
•LTE_ANT_1

•LTE_ANT_2
•LTE_ANT_3
•LTE_ANT_4
•GNSS_ANT_1
•GNSS_ANT_2
•CV2X_ANT_1
•CV2X_ANT_2
Multi-transmission is not possible. The figure below shows the general breakout of the module:
Figure 2: NAD Pin Breakout
The FE4RW0110NADs should be oriented on the main board to minimize the length of the primary LTE
TX/RX antenna (LTE_ANT_1). This 50ohm line should be as short as possible to the external RF
connector or internal antenna feed point.
The RF traces from the NAD antenna pins on the main board can be stripline or microstrip.
For routing microstrip lines UNDERNEATH the NAD on layer 1, these ground cutouts internal to the
NAD need to be accounted for in the stripline calculation. The internal GND height and dielectric
constant of the NAD board are shown below:

H = 19.3 mils (491 micron)
Dielectric Constant = 4.1
For example, consider the following stackup for a main PCB:
Figure 3: Recommended PCB Stack-up
Assume the main PCB above with a 6 layer stack up with ground cut away on layer 2 so the microstrip
lines reference ground on layer 3. The dielectric thickness from L1 to L3 is 21.2 mils.
Using an online impedance calculator, the line width under the NAD for a 50 ohm line is 15.9mils
(405micron) shown below:

Figure 4: Stripline Impedance Calculations
The calculation for the microstrip line width outside the NAD is 37.7mils (967micron) shown below:
Figure 5: Microstrip Impedance Calculations
Due to the nature of the weave chosen for each PCB, the dielectric constant of the NAD board is 4.1 while
the main board is 4.3. A dielectric constant of 4.2 was chosen in the stripline calculation, while 4.3 was
used for the microstrip calculation.
Main board stack up may vary so these line widths may need to be recalculated. IT IS HIGHLY
RECOMMENDED TO USE A SIMILAR STACKUP AS SHOWN IN FIGURE 3.
Antenna Routing Recommendations:
1. Microstrip routes on layer1 and very short route under the NAD.
Figure 6: Antenna Line Microstrip Routes on Layer1
2. Then routes to inner layer and continues route as stripline.

Figure 7: Antenna Line Stripline Routes On Inner Layer
These line widths may vary depending on the stack up selected for the main board.
6.3 RF Antenna Layout Parameters
Type of Guidance
Requirement
Trace impedance
50-Ohms ± 10% single-ended
Total route length
<100-mm
Ground between signals
> 1 x line width of ground trace between, stitched VIA to ground
Ground between signals
> 3 x line width of ground trace between, stitched VIA to ground
Spacing to other signals
< 3:1
•The RF signals should be routed STRAIGHT OUT OF THE NAD TO THE NEAREST EDGE along
similar route pat but separated by ground trace.
•Trace impedances should match the table, either as microstrip or stripline.
•Total length for both signals should be kept to a minimum always optimizing the PRIMARY_ANT
(LTE_ANT_1) path.
•Spacing to ground or other signals on outside of bundled signals should match the table.