Circular array pattern elevation in GHz

Hi!

I'm designing a circular array of 20 elements at 2.5GHz. When I try to plot the patter elevation, matlab gives me an error.

Please help meeeee!

f = 2.5e9;%Ghz

ca = circularArray('NumElements',20);

figure()

patternElevation (ca, 2.5e9);

Answer 1

[Ninad]

Hello Michela,

As per my understanding you are trying to use the `patternElevation` function to plot the `circularArray` object. I tried to reproduce your code and observed that the memory utilization and run time of the `patternElevation` function rises with the rising frequency. I have noted my observations for you reference:

Frequency Elapsed Time

-----------------------------------------------------------------------

70e6 (70 MHz) 1.34 s

10e7 (100 MHz) 2.22 s

20e7 (200 MHz) 5.07 s

30e7 (300 MHz) 53.68 s

50e7 (500 MHz) 559.48 s

1e9 (1 GHz) Error – Out of memory

This is the snapshot of the error message:

You see this error because, the Frequency value impacts the memory requirement of the `patternElevation` function.

You may use the `patternElevation` function for a lower frequency value.

Alternatively, you can try the `arrayFactor` function that plots the 3-D array factor of the specified array at the specified frequency value in dB.

I have tried to reproduce the code and saved it to the file `CircularAntennaArrayExample.mlx`, attached with the post.

References:

arrayFactor: https://in.mathworks.com/help/antenna/ref/arrayanalysis.arrayfactor.html

Out of Memory Error: https://in.mathworks.com/help/matlab/matlab_prog/resolving-out-of-memory-errors.html#responsive_offcanvas