Primary use-cases are data-centric with data and voice connections to Telematics Service Providers (TSP). Note: The FE5NA0D31 Module support the DSDA (Dual Sim Dual Access) feature in HW, but DSDA is disabled from SW config, so the FE5NA0D31 will behavior like a single SIM Module.
The integrated device must provide RF connectors to external antennas or RF traces to connect the FE5NA0D31 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.
SAR will be required if the distance limitation cannot be met. The FE5NA0D31 module does not contain internal antennas and external antenna must be provided by the integrator or OEM. Based on FCC OET Bulletin 65 Supplement C and 47 CRF §2.1091 and on RSS-102 Issue 5,...
FE5NA0D31 Module Specification This radio transmitter (FCC ID: LHJ-FE5NA0D31) has been approved by FCC to operate with the antenna types listed above 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.
FE5NA0D31 Module Specification Figure 4-1: Module Label Example 5 NAD Module RF Characteristics NAD Module RF Transmitter Output Power The Transmitter Power at the NAD antenna terminal (not the RF port of the evaluation board or the Telematics/parent module) at Room Temperature: ⚫...
FE5NA0D31 Module Specification • 3.0 dB back-off for 3TX slots • 4.0 dB back-off for 4TX slots NAD Module RF Receiver Sensitivity The Receiver Sensitivity at the NAD antenna terminal (not the RF port of the evaluation board or the Telematics/parent module) at Room Temperature: ⚫...
9.1.1 NAD Antenna Breakout The FE5NA0D31 should be oriented on the main board to minimize the length of the primary Cellular TX/RX antenna (ANT1). This 50ohm line should be as short as possible to the external RF connector or internal antenna feed point.
9.1.1.2 Parent PCB Antenna Pad Design Recommendation The main board on which the FE5NA0D31 will be mounted should have ground cut out under the RF antenna pins of the NAD as shown in Figure 9-4 and Figure 9-4: Figure 9-5: Antenna Pad Ground Cutout Recommended (Main Board, top layer/NAD side)
FE5NA0D31 Module Specification Figure 9-6 Antenna Pad Ground Cutout x8 (detail view) The dimensions of the RF trace on the Main Board will be dependent on the layer stack-up of the board, their thicknesses and how many layers are used. As an example, the main PCB shown in Figure 9-5 is a 6 layer stack up with Ground cut out on layer 5 so the microstrip lines on the bottom (layer 6) reference Ground on layer 4.
FE5NA0D31 Module Specification Type of Guidance Requirement Trace impedance 50±10% Ohms, single-ended Total route length < 100 mm Ground between signals > 1 x [RF line width] with stitched VIA to ground layer Spacing to other signals > 3 times RF line width, to any non-RF traces VSWR for Cellular Antenna <...
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