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Member
Reputation: 29
Vertically Polarized Antennas
Guys,
Why we use vertically polarized TX/RX antennas in cellular telephony?
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2010-12-29 05:00 AM
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Member
Reputation: 205
Re: Vertically Polarized Antennas
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.
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Member
Reputation: 29
Re: Vertically Polarized Antennas
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.
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Re: Vertically Polarized Antennas
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.
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Senior Member
Reputation: 591
Re: Vertically Polarized Antennas
Originally Posted by
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.
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.
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Re: Vertically Polarized Antennas
vertical pol. has better conditions to propagation in urban environment
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Member
Reputation: 99
Re: Vertically Polarized Antennas
X polarized is used in Rural and Urban.
Advantage is compact size and having Diversity Gain
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Senior Member
Reputation: 591
Re: Vertically Polarized Antennas
Originally Posted by
mobilek530
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.
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Member
Reputation: 99
Re: Vertically Polarized Antennas
Dear
As per technical understanding , it is quite right but implementation of Space Diversity is costly and difficult.
Regards
Please add repu & Thanks.
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Member
Reputation: 29
Re: Vertically Polarized Antennas
Thanks Everyone!
Can you please tell me how to add reputation to you guys?
Just clicking thanks?
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