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M14A2A User Manual
3.
RF Specifications
3.1.
RF connections
M14A2A provides two RF pads; developers can connect them via 50
Ω
traces to the main board.
TRX pads
–
RX/TX path
DRX pads
–
Diversity path
It is recommended to have keep-out under the two RF pads.
3.2.
Interference and sensitivity
This section is to help developers to identify the interference that may affect M14A2A when adopting it
in systems.
Interference from other wireless devices
Harmonics or inter-modulated signals generated from wireless devices that fall in RX ranges of M14A2A
may result in degraded RX performance.
It is highly recommended to check the RX performance of the entire systems in the shielding
environment.
Interference from the host interface
High-speed switching signal elements in the system can easily couple noise to the module
(Ex.: DDR memory, LCD modules, DC-DC converter).
Methods to avoid sources of interference
Antenna location is important; it is recommended that the antenna away from high-speed switching
signals. Tracing from the module to the antenna is recommended to be as short as possible and must be
shielded by complete grounding.
However, M14A2A is well-shielded. The high-speed elements in the system are recommend to be
reserved for shielding during an early stage
of a proje t’s develop e t
.
