2007-02-02 13:19:06 · 4 answers · asked by casaouia 2 in Science & Mathematics ➔ Other - Science
Cellular phones can operate in the following frequency bands depending on your country. Typically for GSM and CDMA
450 MHz (actually 450 - 496MHz)
850 MHz (actually 824 - 894 MHz)
900MHz (actually 876- 960 MHz
1800 MHz (actually 1710 - 1880MHz)
1900MHz (actually 1850 - 1990MHz)
A microwave oven operates at 2450 MHz - in what is called the ISM or Industrial, Scientific and Medical band. This frequency is chosen as it is the one that water absorbs (and thus becomes hot)
Wi-Fi and Bluetooth operates from 2400 - 2483MHz ( which is why sometimes microwave oven interfere with them) They operate at very low power compared to an oven so do not run the risk of heating you up.
There are some newer 'cellular' bands at 2100MHz (3G), 2300 MHz (WCS in the USA) and 2500-2700 MHz (called BRS and EBS in the USA). There are also some bands for fixed wireless broadband (wireless DSL) from 3300-3700 MHz in some countries (Europe and Asia)
RF engineers do refer to microwave radio - this is typically 5800MHz or more - well above the microwave oven frequencies - these are used to transport the data from the cellular towers back to the telephone system.
2007-02-02 13:53:54 · answer #1 · answered by elentophanes 4 · 0⤊ 0⤋
2
2016-08-12 12:29:48 · answer #2 · answered by Nadene 3 · 0⤊ 0⤋
Not from the cell phone to the base station, but they are used sometime for the larger communication links between areas.
2007-02-02 13:30:12 · answer #3 · answered by KB 2 · 0⤊ 0⤋
I think, but I'm not completely sure, so don't believe me 100%!
2007-02-02 13:22:24 · answer #4 · answered by zswrs1 3 · 0⤊ 0⤋