Multi-band
Frequency, Roaming, GSM frequency bands, UMTS frequency bands
978-620-1-25299-8
6201252991
56
2012-06-26
29.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In telecommunications, the terms multi-band, dual-band, tri-band, quad-band and penta-band refer to a device (especially a mobile phone) supporting multiple radio frequency bands. All devices which have more than one channel use multiple frequencies; a band however is a group of frequencies containing many channels. Multiple bands in mobile devices support roaming between different regions where different standards are used for mobile telephone services. Where the bands are widely separated in frequency, parallel transmit and receive signal path circuits must be provided, which increases the cost, complexity and power demand of multi-band devices.
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