BL28RW-001 OEM Manual and User Guide BL28RW-001 OEM Manual and User Guide v 1 (to be used for certification) FCC ID: LHJ-BL28RW001 IC: 2807E-BL28RW001
BL28RW-001 OEM Manual and User Guide Terms and Acronyms • • • • • • • • • • • • • • • • • • • • • • • CDMA DCM DRX ES FDD GLONASS GNSS GPIO GSM HU HSIC LTE MP NAD OEM PCB PHY SIM TCU TDD TSP UMTS WCDMA Code Division Multiple Access Data Connectivity Module Discontinuous Reception Engineering Sample Frequency Division Duplex GLOBal’naya NAVigatsionnaya Sputnikovaya Sistema Global Navigation Satellite System General Purpose Input Output Global System for Mobile Head Unit High Speed Inter-Chip Long Term Evo
BL28RW-001 OEM Manual and User Guide BL28RW-001 Module The BL28RW-001 NAD is a proprietary modem module designed by Continental Automotive Systems, Inc. The modem will be integrated into Data Connectivity Modules (DCMs) or Head Units (HUs) designed and produced by Continental or by a 3rd party for use by automotive OEMs. DCMs will be installed into vehicles during the OEM’s factory assembly process and will not be accessible without use of special tools.
BL28RW-001 OEM Manual and User Guide « Le présent émetteur radio (2807E-BL28RW001) a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés ci-dessous et ayant un gain admissible maximal. Les types d'antenne non inclus dans cette liste, et dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur.».
BL28RW-001 OEM Manual and User Guide o o o o o WCDMA Band 5: 2 dBi LTE Band 2: 2 dBi LTE Band 4: 2 dBi LTE Band 5: 2 dBi LTE Band 7: 2 dBi • This radio transmitter (FCC ID: LHJ-BL28RW001; IC: 2807E-BL28RW001) has been approved by FCC and Industry Canada 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.
BL28RW-001 OEM Manual and User Guide Figure 6-1 Vias placed between Pads 6.2 RF Traces for antennas The NAD has three antenna pins.
BL28RW-001 OEM Manual and User Guide Figure 6-2: NAD Pin Breakout The LTE CAT4 NAD should be oriented on the main board to minimize the length of the PRIMARY_LTE antenna pin (LTE Ant1). 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.
BL28RW-001 OEM Manual and User Guide Figure 6-2: Antenna Pad Ground Cutout (Top View) 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.
BL28RW-001 OEM Manual and User Guide Using an online impedance calculator, the line width under the NAD for a 50 ohm line is 16.9mils (433micron) shown below: BL Figure 6-4 The calculation for the microstrip line width outside the NAD is 37.7mils (967micron) shown below: Figure 6-5 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.
BL28RW-001 OEM Manual and User Guide The antenna traces need to routed STRAIGHT OUT OF THE NAD TO THE NEAREST NAD EDGE. The lines need to be tapered from 433micron to the 967micron width gradually but quickly. Figure 6-6 These line widths may vary depending on the stackup selected for the main board. 6.
