topic Re: Wireless Polar Plot question in Wireless

Wireless Polar Plot question

ChristopherCraddock66504 — Mon, 22 May 2023 17:38:52 GMT

Dear Community,

I am reading that in a wireless polar plot that the outermost circle represents the stronger signal strengths while the innermost circles represent the weaker signal strengths. This seems counterintuitive as the futher you get away from the antenna, the weaker the signal strength should be given the Free Space Path Loss. Am I not understanding this correctly? Why do the outermost circles represent stronger signal strengths?

Thank you.

Re: Wireless Polar Plot question

Flavio Miranda — Mon, 22 May 2023 18:30:45 GMT

It is counterintuitive . Where did you read this? Can you share the link ?

Re: Wireless Polar Plot question

Rasika Nayanajith — Mon, 22 May 2023 20:31:47 GMT

Hi,

Those charts inner circles does not represent distance from AP.

Below example blue line represent signal propagation in horizontal plane. Since it is omni directional it is spreading 360 degrees.If you measure energy at certain distance in the horizontal plane you get same measurement irrespective of direction.

On the vertical plane (Elevation) signals not spread equally. Example if you measure energy at certain distance from AP in the direction of 0 degrees you get maximum energy. At the same distance 60 degree angle you will get 6dB less.

HTH
Rasika
*** Pls rate all useful responses ***

Re: Wireless Polar Plot question

ChristopherCraddock66504 — Tue, 23 May 2023 15:20:37 GMT

Rasika,

Thank you for this. So the polar plot is a means of comparing the signal strength of different radiation patterns of different APs from an E-Plane and H-Plane perspective?

Re: Wireless Polar Plot question

Rasika Nayanajith — Tue, 23 May 2023 19:58:00 GMT

Yes,

It helps you to understand radiation pattern in E-Plane & H-Plane from given antenna

HTH
Rasika