Electronics Engineering

Why is the gsm 900 better than gsm 1800 and gsm 1900?

Answer

User Avatar
Wiki User
11/26/2009

As the frequency increase its penetration power decreases.The signal travels a lesser distance.Hence for a perticular area more no of towers need to be erected in 1800/1900 than in 900MHZ for full coverage...Hence vodafone( 1800MHZ) has more towers per unit area than Idea Cellular ( 1800+900) .....

Band of 900 is from 890-915( uplink) 935-960Mhz( downlink)....

Band of 1800 is from 1710-1785(uplink) and 1805-1880MHZ(Downlink)....

Same property is followed here.....The uplink is lower ( MOBILE -BTS) than the downlink frequency (BTS-MOBILE)...so that this may help the uplink signal to travel futher without consuming much power...BTS due to its increased power ,has higher frequency to tavel the same distance....