RF Coil construction and matching, PhD project
I′m new of the forum and I have problem that I would like to share with you.
As part of my PhD project, I have to build an antenna that is able to create a time variable EM field. To explain you in more details, I have a signal generator from agilent (freq range up to 6GHz) connected to an amplifier (2-4GHz max output power: max 9watt).
The amplifier is connected to a three door circulator (to protect the equipment from all my mistakes in design the antenna ). At one plug of the circulator there is a 50 Ohm load and at the last one there is supposed to be the antenna.
Now the problem, can you explain me how to build such an antenna? I was thinking about starting by wrapping a wire and soldering it to a connector attached to the circulator...
As you can see I′m not that expert in this topic and I will appriciate very much your help.
Thanks a lot.
I think, most antennas do.
I suggest a good antenna text book to get some ideas, e.g. Ballanis. Your post isn't actually clear about the intended class of transmitted signals. Possibly, literature on UWB antennas may be relevant. 2-4 or 2-6 GHz would refer to usual wide band antennas, e.g. logarithmic periodic dipol designs (LPD antennas). Ballanis has a good chapter about it, and there is special literature in addition.
Coils are not particularly suited as impedance matched wideband antennas, I fear.
Thanks for the reply, I′m reading the book that you suggested.
The antenna should have a circular shape and the purpose of it is to generate a EM field that will be able to heat small nanoparticle by induction heating.
I′m not interested in the signal characteristics, I just need to generate a strong enough field to guarantee the heating of the NPs.
The frequencies stated in the post are the limits of the instruments that I have here.
I will operate at one specific frequency each time and I will see the amount of heating that I can generate within the nanoparticles.
So what I need is, I think, is a more "practical" explanation...