Smartphone Wireless
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Contents
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
- Apple Pay
- Android Pay
- Smart card with build in anttenna
- 13.56 MHz
BLE
Bluetooth low energy
- Also excited by a stationary antenna that causes the smartphone to respond
- Needs to have an app on a smartphone that is powered up and has bluetooth enabled that responds to the message
