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mobile antenna voltage

 
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erashish14
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PostPosted: Thu Oct 02, 2008 3:32 pm    Post subject: mobile antenna voltage Reply with quote

Hi,

I like to know that how much VOLTAGE is received by mobile phone while receiving/sending the signals from/to BTS(antennas).

kindly note :- provide answer in voltage not in DB.

Thanks in Advance
Ashish
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PostPosted: Fri Oct 03, 2008 4:18 am    Post subject: Reply with quote

It's not voltage, it's RF off a cell tower or GPS.
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erashish14



Joined: 02 Oct 2008
Posts: 3
Location: delhi

PostPosted: Sat Oct 04, 2008 10:52 am    Post subject: Reply with quote

Hi,

But while receiving the signals, the mobile handset should b receiving certain voltage or current, i like to know that,

how much is the CURRENT / VOLTAGE level which is received by mobile phone while receiving the signals.

Thanks
Ashish
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torbjorn



Joined: 07 Jun 2007
Posts: 370
Location: Sweden

PostPosted: Mon Oct 06, 2008 7:10 am    Post subject: Reply with quote

A mobile phone is similar to a two-way radio in this aspect. Typically, a such radio's receiver needs about 0,2 - 0,5 uV from the antenna to get useable reception but in most cases, signal levels are much higher.

For a mobile phone, you can assume that the received signal level, measured at the interface between the antenna and the receiver, usually lies between 0,5 uV and 100 mV. The receiver's input impedance is typically 50 ohms, so with that information you can easily calculate any current or power levels that are of interest in your case.

Note that those figures are valid for analog mobile systems or GSM, that are relatively narrow-band. For UMTS and other 2,5G or 3G systems, the receiver will have less sensitivity due to the larger noise bandwidth. For details, please refer to the system standards that can be found at www.etsi.org .
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erashish14



Joined: 02 Oct 2008
Posts: 3
Location: delhi

PostPosted: Mon Oct 06, 2008 5:43 pm    Post subject: Thanks Reply with quote

Hi,

Thanks a ton torbjorn, for this valuable information.


Ashish
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