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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Polarization in cellular propagation - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues - primarily having to spend time purging garbage posts from the board. At some point I might start the RF Cafe Forums again if the phpBB software gets better at filtering spam. Note: The RF Cafe Forums were reconstituted in April 2021!

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sag
 Post subject: Polarization in cellular propagation
Posted: Sun Oct 29, 2006 3:29 pm 
 
Captain

Joined: Wed Apr 05, 2006 3:34 pm
Posts: 8
Hay all,

Can some one point me to some papers about the best polarization for a base station? I mean what is the average polarization of a signal that came from a cellular phone?

10x


 
   
 
nubbage
 Post subject:
Posted: Mon Oct 30, 2006 12:49 pm 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm
Posts: 236
Location: London UK
The polarization plane is randomly varying all the time.
many research papers have been written on this topic.

The optimum antenna arrangement seems to be two antennas inclined at 45 degrees to each other and fed through a combiner.

Do a google under "mobile" and "diversity" and "polarisation".


 
   
 
sag
 Post subject:
Posted: Sat Nov 04, 2006 5:58 am 
 
Captain

Joined: Wed Apr 05, 2006 3:34 pm
Posts: 8
10x,

can you send me some research papers that you have?


 
   
 
nubbage
 Post subject:
Posted: Mon Nov 06, 2006 5:37 am 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm
Posts: 236
Location: London UK
Hi sag
I didn't actually keep any as it is not my present field of involvement.
Did you do a Google Search under "mobile" and "diversity" and "polarisation"?

For me this threw up a lot of references. Many however are subscription-only research institutes I don't have a subscription on. But if you have access to a uni library they would be useful.







Posted  11/12/2012
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