I'm using a WiFi module now it's 2.4Ghz and I also need to have another RF modulation device on the same pcb to communicate with some other devices, So because of the WiFI modules 2.4Ghz modulation I can't use a 2.4Ghz modulated RF device so I have shortlisted a 900Mhz RF module (FHSS modulation).
So I want any suggestions and guidelines on what precautions I should take in order to develop a pcb that's performing well with all that disturbance.(Given both the 2.4Ghz and 900Mhz modules would be on the same PCB but on the opposite sides)
shortlisted module >> HumDT™ Series RF Transceiver Module - Linx Technologies
WiFi chip ESP8266 or RN171