What signals are used on wireless networks to send data?

Wireless networks use radio waves, which are a type of electromagnetic radiation, to send data. These signals are modulated to encode information, often using various techniques like amplitude modulation (AM), frequency modulation (FM), or phase shift keying (PSK). Additionally, different frequency bands (such as 2.4 GHz and 5 GHz) are utilized to support various wireless standards like Wi-Fi and Bluetooth. The data is transmitted in packets, which can be received and decoded by devices within range of the signal.