- 11th April 2009, 09:13 #1

- Join Date
- Sep 2006
- Location
- North America
- Posts
- 174
- Helped
- 716 / 716
- Points
- 15,364
- Level
- 29

## radiation pattern matlab

Hi all:

I want to know how to plot radiation pattern**in dB (Logarithmic)**in MATLAB?

Thanks.

- 11th April 2009, 09:13

- 12th April 2009, 00:48 #2

- Join Date
- Apr 2008
- Posts
- 206
- Helped
- 40 / 40
- Points
- 2,662
- Level
- 12

## matlab radiation pattern

1) which version of MatLab

2) What is your INPUTS ??

- 12th April 2009, 06:08 #3

- Join Date
- Sep 2006
- Location
- North America
- Posts
- 174
- Helped
- 716 / 716
- Points
- 15,364
- Level
- 29

## radiation pattern in matlab

Hi Kohi_boy:

The version is 2006Ra.

My inputs are angles(rad) and for example Gain in dB or Mag. I export them from HFSS.

1 members found this post helpful.

- 13th April 2009, 07:41 #4
## 3d polar plot matlab

Hello masud_809,

Plotting radiation patterns in matlab is simple but little tricky. I use normalised radiation patterns i.e. max gain is '0' and then it decreases so the scale look likes 0,-5,-10 ...-40(dB) . Other important thing to keep in mind is the POLAR function in matlab do not plot the negative gains and returns you with an error so you have to keep everything positive or zero values.

So to plot the normalised radiation patterns :

1. open your data in excel sheet.

2. look for the max. gain value for particular angle, say for example its 6 dB. Now to make a plot with scale 0 to -40 dB which is most common, add 40-6 i.e 34 to all the gain. This make the highest gain of your result which is 6 dB in our example to 40 dB and other decreases accordingly.

3. Now look for any negative values in gain column and replace it to 'Zero'. Once done now you can plot this normalised radiation pattern data using POLAR command and since you already have angles in radians so just directly use that.

Once you plot the pattern just change the scale in matlab plot as 0 to -40.

Hope this solve your query.

Thanks & Regards

Praful

2 members found this post helpful.

- 13th April 2009, 10:31 #5

- Join Date
- Sep 2006
- Location
- North America
- Posts
- 174
- Helped
- 716 / 716
- Points
- 15,364
- Level
- 29

## plot radiation pattern matlab

Dear prafuldeo:

Thank you very much for your description! I appreciate your time. I will check it out today.

Cheers.

- 13th April 2009, 21:06 #6
## matlab plot db

Hello masud_809,

Give it a try and let me know how did it go.

Cheers

1 members found this post helpful.

- 14th April 2009, 03:05 #7

- Join Date
- Oct 2008
- Posts
- 83
- Helped
- 17 / 17
- Points
- 1,410
- Level
- 8

## matlab plot

by far the easiest way is to download the m-file 'mmpolar'.

It automatically generates polar radiation plots that are of the style we are all used to seeing.

http://blogs.mathworks.com/pick/2005...le-polar-plot/

2 members found this post helpful.

- 14th April 2009, 03:05

- 14th April 2009, 05:41 #8

- Join Date
- Jun 2006
- Location
- Higashiosaka-shi, Osaka, Japan, Japan
- Posts
- 36
- Helped
- 4 / 4
- Points
- 1,639
- Level
- 9

## polar plot matlab

http://www.mathworks.com/matlabcentr...eexchange/1251

radiation pattern plot

2 members found this post helpful.

- 14th April 2009, 05:41

- 14th April 2009, 14:46 #9
## mmpolar download

I've tried mmpolar function, seems it doesn't support the hold on command so multiple plots in same figure is not possible.

- 15th April 2009, 12:38 #10

- Join Date
- Apr 2007
- Location
- India
- Posts
- 26
- Helped
- 7 / 7
- Points
- 1,613
- Level
- 9

## how to plot radiation pattern

hi everybody,

can anybody expalin how to make 3D polar radiation pattern in matlab?

I am using UV plot where with mesh(x,y,z) command

x=sin(theta)cos(phi)

y=sin(theta)sin(phi)

ans

z=calculated gain

all are NxN square matrix

But I want to plot in polar form

Thanks

- 16th April 2009, 08:16 #11
## matlab polar db

Hi mns,

I've never tried 3D polar plots in matlab but seems an interesting exercise. I'll try and let you know.

Regards

- 16th April 2009, 08:29 #12
## how to plot in matlab

Dear all,

I think you can use sisotool function to draw it.

With my best wishes.

- 11th January 2010, 05:04 #13

- Join Date
- Jan 2010
- Location
- nellore
- Posts
- 2
- Helped
- 0 / 0
- Points
- 646
- Level
- 5

## Re: how to plot radiation pattern

Originally Posted by**si14**

hai mns..

pls give me idea about taking theta and phi values in matlab as iam doing project on plotting antenna radiation pattern using matlab for all type of antennas...

hope i will get reply soon

thanku

- 11th January 2010, 05:19 #14

- Join Date
- Sep 2006
- Location
- North America
- Posts
- 174
- Helped
- 716 / 716
- Points
- 15,364
- Level
- 29

## Re: how to plot radiation pattern

Originally Posted by**nagasravanthi**

What do you mean by "taking theta and phi values"?

For this post, as you can see, I used MATLAB to re-plot a radiation pattern which I generated with HFSS.

So my angle data were ready and I just needed a function to SHOW that data in 2d/3d.

Regards

- 11th January 2010, 06:36 #15

- Join Date
- Jan 2010
- Location
- nellore
- Posts
- 2
- Helped
- 0 / 0
- Points
- 646
- Level
- 5

## Re: radiation pattern matlab

thanks for ur reply.....

can u give me some idea to how to plot radiation pattern for rectangular aperture with a=3lambda,b=2lambda in matlab....hope for the reply...

thnku

- 11th January 2010, 07:36 #16

- Join Date
- Sep 2006
- Location
- North America
- Posts
- 174
- Helped
- 716 / 716
- Points
- 15,364
- Level
- 29

## Re: radiation pattern matlab

Originally Posted by**nagasravanthi**

You can find the radiation pattern for these apertures in any antenna text books. My suggestion is Balanis.

Cheers

- 24th August 2010, 16:39 #17

- Join Date
- Aug 2010
- Location
- India
- Posts
- 1
- Helped
- 0 / 0
- Points
- 409
- Level
- 4

## Re: How to plot radiation pattern in MATLAB (in dB)

hi all,

can anyone say me the commands for plotting the radiation pattern for patch antennas clearly

- 10th August 2011, 16:51 #18

- Join Date
- Jul 2010
- Location
- uk
- Posts
- 17
- Helped
- 0 / 0
- Points
- 796
- Level
- 6

## Re: How to plot radiation pattern in MATLAB (in dB)

Hello,

how can i plot radiation pattern of an antenna in Matlab?

thanks