ZTE Corporation ZM8300G Manual Do Utilizador
ZTE ZM8300G Module Hardware User Manual
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line and the ground (S). The microstrip and stripline are generally used to control the
characteristic impedance of an RF line.
Microstrip Line Design on a 2-Layer PCB
To ensure RF performance and reliability, refer to the following rules specified for PCB layout:
Use an impedance simulation tool to ensure that the characteristic impedance of an RF
line is 50 ohms.
Connect the entire ground pin that is adjacent to an RF pin to the main ground. Do not
connect it to a thermal pad.
Minimize the distance between an RF pin and an RF connector.
Ensure an adequate forbidden area for the pad or solder joint of an antenna connector.
Ensure a complete reference ground plane for an RF line. In addition, add a row of
ground holes between the RF line and the surrounding area to effectively improve RF
performance. Ensure that the distance between the ground and the RF line is equal to or
greater than twice the line width (2 x W).
4.3 Test Standard for Conducted RF
The ZM8300G module meets RF requirements specified in 3GPP TS 36.521-1.
4.4 Requirements for Antenna Design
4.4.1
Key Points for Antenna Design
Antennas are very important for wireless communication products, because antenna
performance directly affects the communication quality of the products. Before designing
antennas, select antenna types based on available space and application scenarios. Table
4-6 provides detailed information about how to select NB-IOT antennas.
Table 4-6 Detailed Information About How to Select NB-IOT Antennas
Product Type
Characteristics of Application
Scenarios
Antenna Type Selection