How do we excite the elements of an antenna array at different frequencies?

Hi,

I am trying to write a code for a circular array having 8 elements. But I want to excite each antenna elements at different frequency.(Say, Element #1 is excited at f0, Element #2 is excited at f0+Δf, and so no...) where f0=2.4 GHz, and Δf = 100 KHz. Such an array is known as Frequency Diverse Array(FDA).

I am using the conformalArray function to define my circular array, with each elements being a dipole.

How do I proceed?

Thank You.

Biplob Biswas

PhD Research Scholar

Answer 1

[Dinesh]

Hi Biplob!

To excite each antenna element at a different frequency in a circular array, you can create a for loop where each antenna element will be assigned a frequency.

First create a conformalArray to define a circular array with each element as a dipole. Then iterate over the elements of array and change the relevant properties of dipole antenna.

A sample code would be,

for i = 1:numElements % in this case 8
    freq = f0 + (i-1)*deltaf; % Frequency of each antenna element
    yourCircularArray.Element(i).property_name = freq; % Assign frequency to the ith element
end

For details on conformal arrar please refer this MATLAB documentation.

[Biplob]

Hi Dinesh,

Thanks for your answer.

I tried this code. But the problem is that I am using dipole as array element, and such a property doesnot exists for class dipole. As far as I know, we can design a dipole at a perticular frequency by using the command: design(dipole,f0). This will change the dimensions of the dipole to resonate at f0.

In my case, I want to feed the dipole at different frequencies.

Best wishes,

Biplob.