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FM radio and AM radio relay in mobile phones using while traveling


Date: 07 Jan 2016   Posted By: Ramachandran Pattabiraman     Group: Science and Technology    Category: Technology   

It is very common to hear FM radios through mobiles. If FM is beyond the frequency disturbances, then why we do we hear disturbance in FM transmission while traveling? Why we cannot hear the relay of other AM radios over mobiles, like in a transistor?
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Author: RAJAN    08 Jan 2016      Member Level: Silver     Points : 1    Voting Score: 0

Radio waves are only travel in a straight line. It is also called as line of propagation. When travelling in a vehicle the radio waves are not easily get onthe mobile devices. It is according to the speed of vehicle and availability of signals. Weak signals are also make noise and disturbance.

Author: Bhuvaneswara Rao Nalla    08 Jan 2016      Member Level: Gold     Points : 4  (Rs 4)    Voting Score: 0

The receivers used for FM and AM are different. In transistor radio, both the receivers are present but in mobile phones, we only have FM receiver. There could be many reasons for not including an AM receiver in mobile phones. Since most of the FM stations are run by private companies, the entertainment quotient will be more in FM as compared to AM, which is generally run by Government. The other reason for not including AM receivers could be requirement of extra circuitry, which may increase the cost of the mobile phones. In addition to that AM signals are more prone to disturbances when compared FM signals.
The disturbances that we hear in FM radios while traveling could be due to weak signals or due to receiving of the same signals multiple times because of reflections from the surrounding buildings.


Author: Bhushan    10 Jan 2016      Member Level: Gold     Points : 2  (Rs 2)    Voting Score: 0

I think Previously some old Mobiles have an antenna receiver but now a days somehow the Mobile Manufacturers are not giving this future(receiving antenna) it in Mobile sets. I think if there is a receiving antenna than the signals will come to your Mobile than it will definitely gives less Distortion of Noise . You can hear it clearly.




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