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for under 1Ghz, increase the diameter of the disks accordingly but keep the same spacing at the feedpoint.And do these dimensions also work under 1GHz?
Thanks for the links!
I searched "ADF4351 evaluation board", and yes they say it generates frequency from 35MHz to 4300MHz, but I don't understand how to use it.
How to set the frequency and how do we use the output signal? Do I connect it directly to the antenna?
Do I need an Arduino? Or is there a simple way to use it?
I was planning to confine the system in a box that has aluminum foil on the wallsBe careful. Wherever you live you are probably only allowed to connect a signal generator to an antenna if you are licensed by your government. In some countries you cannot connect anything to an antenna without a license (The UK comes to mind)
you will want that, but also have some RF absorptive material inside of that... or make your container so that no two shielding surfaces are parallel. one of the things about microwaves is that the wavelengths are smaller than the box you are putting your apparatus into, and so you will get standing waves in the box when the distances between two opposite walls are multiples of a quarter wavelength.. this will give a lot of cancellations and reinforcements at various frequencies that can obscure the absorption curves you are looking for.I was planning to confine the system in a box that has aluminum foil on the walls