* [ath9k-devel] Question about AR9380 [not found] <CACRJzbJqNG4mdeD2V2LUrK5+vxWfUsm8RQbo2tJmoEG=vBqQbw@mail.gmail.com> @ 2012-05-08 14:43 ` Mohammed Shafi Shajakhan 2012-05-10 9:35 ` Mohammed Shafi 0 siblings, 1 reply; 3+ messages in thread From: Mohammed Shafi Shajakhan @ 2012-05-08 14:43 UTC (permalink / raw) To: ath9k-devel Hi, i would just check with the internal guys and tell. as far i know antenna diversity related stuff is not there in AR9380. not sure how the theoretical http://www.edaboard.com/thread54187.html applies ccing list On Tuesday 08 May 2012 07:13 PM, Gustavo Fraidenraich wrote: > Dear Mohammed Shafi, > > > > I am interested in the chip AR930 for 802.11n solution and would like > to ask some questions about the antennas to be installed with the > module. > . > 1) Is there any requirement to the antenna spacing ? Like it must be > lambda/2? Or it could be any distance? > 2) Is it mandatory that the antenna radiation pattern should be > omnidirectional or it is possible to use a directional antenna like > Horn antenna? > > Thank you very much > > Best regards, > Prof. Gustavo Fraidenraich > > > > > > > > > > > > > > > > -- thanks, shafi ^ permalink raw reply [flat|nested] 3+ messages in thread
* [ath9k-devel] Question about AR9380 2012-05-08 14:43 ` [ath9k-devel] Question about AR9380 Mohammed Shafi Shajakhan @ 2012-05-10 9:35 ` Mohammed Shafi 2012-05-10 13:16 ` Adrian Chadd 0 siblings, 1 reply; 3+ messages in thread From: Mohammed Shafi @ 2012-05-10 9:35 UTC (permalink / raw) To: ath9k-devel Hi, with inputs from Felix. generic recommendations to increase spatial diversity for MIMO antennas: - an orientation(angle) difference of about 90 degrees - if signal should pass through a wall orient antennas parallel to that wall. - when using polarized antennas, orient the fields approximately orthogonally Of course specifics are very application depentent. It is possible to use directional antennas. Wifi is also often used for point to point links, normally single antenna solution are used for that. thanks, shafi On Tue, May 8, 2012 at 8:13 PM, Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com> wrote: > Hi, > > i would just check with the internal guys and tell. > as far i know antenna diversity related stuff is not there in > AR9380. ?not sure how the theoretical > http://www.edaboard.com/thread54187.html > applies > ccing list > > On Tuesday 08 May 2012 07:13 PM, Gustavo Fraidenraich wrote: >> Dear Mohammed Shafi, >> >> >> >> I am interested in the chip AR930 for 802.11n solution and would like >> to ask some questions about the antennas to be installed with the >> module. >> . >> 1) ? ? ?Is there any requirement to the antenna spacing ? Like it must be >> lambda/2? Or it could be any distance? >> 2) ? ? ?Is it mandatory that the antenna radiation pattern ?should be >> omnidirectional or it is possible to use a directional antenna like >> Horn antenna? >> >> Thank you very much >> >> Best regards, >> ? Prof. ?Gustavo Fraidenraich >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> > > > -- > thanks, > shafi > _______________________________________________ > ath9k-devel mailing list > ath9k-devel at lists.ath9k.org > https://lists.ath9k.org/mailman/listinfo/ath9k-devel -- thanks, shafi ^ permalink raw reply [flat|nested] 3+ messages in thread
* [ath9k-devel] Question about AR9380 2012-05-10 9:35 ` Mohammed Shafi @ 2012-05-10 13:16 ` Adrian Chadd 0 siblings, 0 replies; 3+ messages in thread From: Adrian Chadd @ 2012-05-10 13:16 UTC (permalink / raw) To: ath9k-devel Just as a follow-up, I'm sure there are many, many books covering antenna and MIMO design (wifi and otherwise), with a lot of both theory and practical experience. I suggest you do a bit of digging in the library and through online academic journal sites. :) adrian ^ permalink raw reply [flat|nested] 3+ messages in thread
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[not found] <CACRJzbJqNG4mdeD2V2LUrK5+vxWfUsm8RQbo2tJmoEG=vBqQbw@mail.gmail.com>
2012-05-08 14:43 ` [ath9k-devel] Question about AR9380 Mohammed Shafi Shajakhan
2012-05-10 9:35 ` Mohammed Shafi
2012-05-10 13:16 ` Adrian Chadd
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