Reference Circuitry; Pcb Guidelines; Module Dimensions; Figure 6 - Module Dimensions - Globalstar ST150M User Manual

9150-0125-01 R-1

5.2 REFERENCE CIRCUITRY

5.2.1 PCB GUIDELINES

OEM designs are required to follow certain guidelines with respect to the antenna configuration and layout. Physical layout, PCB
size and stack-up, component part numbers, etc. may vary. However, the following conditions must be met in order to comply
with the ST150M modular grant.
1. The antenna used must be a patch antenna.
2. The antenna peak gain must not exceed 5.1dB.
3. The antenna must be passively connected to the RF output of the ST150M using a 50-ohm nominal impedance printed
circuit trace. No connectors are allowed on the antenna connection.
If any of the above conditions are not met, the OEM device must be submitted for FCC Part 25 testing (and any additional
certification testing required in the intended geographical service area).
In addition, it is strongly recommended that the OEM design include ESD protection circuitry. The circuit should provide a DC
blocking capacitor as well as a shunt inductor to short any static discharge from the antenna to ground.

5.2.2 MODULE DIMENSIONS

Dimentions in mils
FIGURE 6 – MODULE DIMENSIONS
ST150M User Manual Confidential & Proprietary Information 21