topic standing right below an AP cannot gain the best signal. in Wireless

standing right below an AP cannot gain the best signal.

Steve Zhou — Mon, 05 Jul 2021 14:24:27 GMT

Hi,

I heard that standing right below an AP cannot gain the best signal and someone showed me this http://www.cisco.com/c/dam/en/us/td/i/300001-400000/350001-360000/353001-354000/353602.tif/_jcr_content/renditions/353602.jpg, can I get some explain in theory for better understanding?

thank you!

Hi Steve,

Rasika Nayanajith — Tue, 25 Jul 2017 05:49:23 GMT

Hi Steve,

If you look at those radiation pattern in 3D it should be something like below. As you can see on Z plane, if you sitting just below the AP, you won't get proper coverage

HTH

Rasika

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Hi Rasika,

Steve Zhou — Tue, 25 Jul 2017 06:39:18 GMT

Hi Rasika,

Does the picture only apply to omidirectional antenna, or all types of antenna?

Hi Steve,

Rasika Nayanajith — Tue, 25 Jul 2017 06:44:31 GMT

Hi Steve,

Yes, above is for omni directional antenna.

Pls refer below Cisco Antenna guide to understand radiation pattern for different antenna types. There are some 3D illustration, so you should be able to understand it better.

http://www.cisco.com/c/en/us/products/collateral/wireless/aironet-antennas-accessories/prod_white_paper0900aecd806a1a3e.html

Also keep below antenna deployment guide as a reference as well

http://www.cisco.com/c/en/us/products/collateral/wireless/aironet-antennas-accessories/product_data_sheet09186a008008883b.html

HTH

Rasika

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