Data Sheet

EMC3080 Series Wireless Module Data Manual
Copyright of Shanghai MXCHIP Information Technology Co., Ltd.
15
Antenna Information
EMC3080 has two specifications: PCB antenna and external antenna, please refer to the order code for
order. IPX antenna connectors are not soldered on the modules using PCB antennas. By connecting an
external antenna through an IPX connector, you can get better RF performance.
PCB antenna parameters and use
4.1.1. On-board PCB parameter
Table 18 On-board PCB parameter
Item
Min.
Typical
Max.
Unit
Frequency
2400
2500
MHz
Impedance
50
Ω
VSWR
2
Gain
≤2dBi
dBi
Efficiency
>70% or >-1.54dB
PCB Antenna Clearance
When using PCB antenna in WIFI module, it is necessary to ensure that PCB and other metal devices are
at least 16 mm away from the motherboard. The shaded areas in the figure below need to be far away
from metal devices, sensors, interference sources and other materials that may cause signal interference.
Figure 4 Antenna minimum clearance area (unit: mm)
External antenna parameters and use
Users can choose different 2.4G antennas with different external dimensions and gains not greater than
2dBi according to the application environment.
When using an external antenna, it should be noted that the module must be powered on after the
antenna is connected, because the module will perform IQ calibration after power on, and send a single
carrier through the PA to pass the RX loop detection signal. If the load is not loaded (the antenna is not
connected), it will cause calibration errors, which will make the PA output power abnormal, and a large
standing wave will be formed at the PA output, which may damage the internal devices.