Sunday, May 22, 2011

CrazyEngineers Forum - Electrical & Electronics Engineering

CrazyEngineers Forum - Electrical & Electronics Engineering

How mobile radio works with such a small antenna ?

Posted: 21 May 2011 09:38 AM PDT

As we know we must have an antenna of length 1/4th of our signal wavelength.So i checked my mobile and note down the frequency and after calculation i got result 1/4m(approx).But no any antenna of 1/4m i have in my mobile then how it works ?

Even i cut my earphone wires only plug is there which is of 1/10m but still it works and i can hear the sound clearly !!:confused:

How a mobile phone detect strength of signal.

Posted: 21 May 2011 09:17 AM PDT

Hello friend's
Actually i want to know what is the instrument in mobile by which we can able to detect strength of signal(like i got 3 parallel lines on our mobile screen when there is full signal strength).
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