Difference between revisions of "Smartphone Wireless"
From MgmtWiki
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* RF = Radio Frequency | * RF = Radio Frequency | ||
* HF = High Frequency | * HF = High Frequency | ||
| − | * | + | * UHF = Ultra High Frequency |
* IR = Infrared | * IR = Infrared | ||
* Light is even higher, but that is handled by the camera and not radios | * Light is even higher, but that is handled by the camera and not radios | ||
Revision as of 17:54, 20 December 2020
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
- UHF = 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 + battery powered
- 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 with a UUID
- Operations at 2.4 GHz at about 70 meters between device and anttenna.
WiFi
Generally used for local internet connections. Can also be enabled by one of the above to send a UUID.
