Vertically Polarized Antennas

[snabeel03]

Guys,

Why we use vertically polarized TX/RX antennas in cellular telephony?

[pathloss]

Don't we use XPol polarized Antennas in cellular networks?

The reason for this is that your holding your mobile not vertically but at a certain angle.

[snabeel03]

Thanks.Can you please tell me the difference between Vertical polarization and Cross polarization?

In Cross Polarization,TX antenna(BTS antenna) ,EMF is at right angle to RX antenna(Mobile)? Please correct me if I am wrong.

[mimoX]

When vertical polarization is used, less interference is produced or picked up because of strong vhf and uhf broadcast transmissions (television and fm radio). This is because vhf and uhf transmissions use horizontal polarization. This factor is important when an antenna must be located in an urban area having several television and fm broadcast stations.

[firstmaxim]

Don't we use XPol polarized Antennas in cellular networks?

The reason for this is that your holding your mobile not vertically but at a certain angle.

On the other hand, the reason is to offset the impact of fast fading. The fading on the two sets of antennas would have little correlation with one another. So, if one antenna receives signals undergoing a fade, the other is less likely to receive the signal with fade. However, note that these antennas can only be used only in strong multipath environments (urban) and have little benefit in rural environments.

[proy1_10]

vertical pol. has better conditions to propagation in urban environment

[mobilek530]

X polarized is used in Rural and Urban.
Advantage is compact size and having Diversity Gain

[firstmaxim]

X polarized is used in Rural and Urban.
Advantage is compact size and having Diversity Gain

I agree with you that it is compact and contributes to reduction of visual pollution, but diversity gain of X pol is a secondary advantage. You can use X-pol in rural areas, but you will not benefit from it, because of the poor multipath characteristics of a rural terrain. Instead, opt for space diversity in rural terrains.

[mobilek530]

Dear

As per technical understanding , it is quite right but implementation of Space Diversity is costly and difficult.

Regards


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[snabeel03]

Thanks Everyone!

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