24 / 33
□
Normal
□
Intern
al Use
Confidential
□ Re
stricted Confidential
User Manual
Connector to
Antenna
3.3. Antenna Guidance
The antenna should be 50ohm characteristic impedance with the return loss of better than -10dB
at the operation band. The antenna gain would affect the radiated power and regulator test result.
3.4. Interference and sensitivity
This section includes tips to assist developers in identifying the interference that may affect the M14Q2
when is it used in systems.
Interference from other wireless devices
–
Harmonics, inter-modulated signal generated from wireless devices that fall in RX ranges of
the M14Q2, may result in degraded RX performance.
–
It is highly recommended to check RX performance of entire systems within the shielding
environment.
Interference from host interface
–
High-speed signal-switching elements in systems can easily couple noise into the module
(Ex.: DDR memory, LCD modules, DC-DC converter).
Methods to avoid sources of interference
