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What is Bluetooth (Class I, II, and III)

Chapter 42
Handbook of Research on Wireless Security
Bluetooth is the name of a wireless technology standard for connecting devices, set to replace cables. It uses radio frequencies in the 2.45 GHz range to transmit information over short distances of generally 33 feet (10 meters) or less. By embedding a Bluetooth chip and receiver into products, cables that would normally carry the signal can be eliminated. There are currently three flavours or classifications of Bluetooth devices, relative to transmitting range. As the range is increased the signal used in the respective classification is also stronger. Note that class III devices are comparatively rare.
Published in Chapter:
Bluetooth Devices Effect on Radiated EMS of Vehicle Wiring
Miguel A. Ruiz (University of Alcala, Spain), Felipe Espinosa (University of Alcala, Spain), David Sanguino (University of Alcala, Spain), and AbdelBaset Awawdeh (University of Alcala, Spain)
Copyright: © 2008 |Pages: 14
DOI: 10.4018/978-1-59904-899-4.ch042
Abstract
The electromagnetic energy source used by wireless communication devices in a vehicle can cause electromagnetic compatibility problems with the electrical and electronic equipment on board. This work is focused on the radiated susceptibility (electromagnetic susceptibility [EMS]) issue and proposes a method for quantifying the electromagnetic influence of wireless radio frequency (RF) transmitters on board vehicles. The key to the analysis is the evaluation of the relation between the electrical field emitted by a typical Bluetooth device operating close to the automobile’s electrical and electronic systems and the field level specified by the electromagnetic compatibility (EMC) directive 2004/104/EC for radiated susceptibility tests. The chapter includes the model of a closed circuit structure emulating an automobile electric wire system and the simulation of its behaviour under electromagnetic fields’ action. According to this a physical structure is designed and implemented, which is used for laboratory tests. Finally, simulated and experimental results are compared and the conclusions obtained are discussed.
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