Smartphone Wireless

Full Title or Meme

There are a large number of radios on a Smartphone. This wiki looks at those that are not part of the cellular network.

Context

Terminology

• RF = Radio Frequency
• HF = High Frequency
• UHR = Ultra High Frequency
• IR = Infrared
• Light is even higher, but that is handled by the camera and not radios
• Exciter = an antenna that is designed to send energy to a passive RFID tag

Existing Bands

RFID

RF Identifier Passive = no battery Active = has batter and dual antenna

• UHF = 300 MHz to 3 GHz
• UHF Gen2 = 860 to 960 MHz

NFC

Near Field Communications

BLE

Bluetooth low energy

• Also excited by a stationary antenna that causes the smartphone to respond
• Needs to have an app that responds to the message