Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

AIR-AP352E2R-A-K9 and two air-ant4941

As influences on AP presence of two air-ant4941 instead of one?

Cisco Employee

Re: AIR-AP352E2R-A-K9 and two air-ant4941

TWO antenna on AP is for diversity reason only . In indoor you get multipath issue which increases interference and reduces throughput so you need diversity antennas . When one antenna is talking other antenna is shut .

* Two Antenna connector is for the Diversity and multipath operations .

To seperate the two antennas on the AP to increase the coverage is

self defeating .

The receiver only listens to one antenna at a time , so while it is

listening to one antenna ,

it's deaf to the other , therefore no coverage area there , and

vice versa . In addition there is till loss in the rf cables which

reduces the effective range of the clients to the Ap

The best way to increase the coverage is to conduct the site survey to

determine the RF coverage and put the Ap in the appropriate areas .

* Distance is not critical . The purpose of the diversity is to overcome

multi-path reflections , therefore so long as the antenna are 1-8 feet

apart or so that would be fine

You don't want the antennas really close ( under 6 inches or so)

because they would tend to " play off each other " causing

the pattern to start to become directional when perhaps that's

not desirable

There is no "true optimum distance "

* Diversity means two different antennas covering the same area but from a

slightly different perspectives .

The angle of the antenna is what is covered by each antenna , but since

they are desinged to cover the SAME area .


CreatePlease login to create content