Wi-Fi is all about data communication, the transferring of information between two or more components. There are three basic requirements for successful communications:
Many components contribute to the successful transmission and reception of RF signals but I will focus on the key components.
The signal is often altered during transmission between the two antennas due to interference and other RF behavior.
So the ultimate question is, will the RF communication work between all the main components? Although I won’t go into in-depth RF calculations, it’s important to highlight a few practical uses of RF measurement.
Many Wi-Fi vendors define signal quality with a term called the signal-to-noise ratio (SNR). The SNR is the difference between the received signal and the background noise level. Data transmissions can become corrupted with a very low SNR which means your communication or data transfer via Wi-Fi will not work very well.
The power level of an RF signal required to be successfully received by the receiver radio is called the receive sensitivity. The lower the power level that the receiver can successfully process, the better the receive sensitivity. All of these radio frequency components and measurements determine the Wi-Fi experience you have when you connect your mobile device to a wireless access point.