I am designing an electrically small microstrip patch antenna, and its "radiative" near field (r = wavelength) reaches quite long enough for the whole imaging region. Basically, I don't need its power to be radiated to the far field.
According to CMA (characteristic mode analysis) theory, we ought to minimize its equation for best power radiation to the far field. So, doesn't it make sense to maximize the function for maximizing the near field instead?
I basically came up with this from reading the HFSS reference guide on CMA, "Where R and X are the real and imaginary parts of the EFIE impedance matrix, Z = R + jX. The real part of P is the power radiated and the imaginary part is the power stored in the near field. For antenna design, we want to maximize the power radiated, or equivalently, minimize the power stored in the near field. The solution to this minimization problem is the generalized eigenvalue problem ..."
So yeah, I thought I can just reverse the optimization to get more near-field storage of power, thinking it would maximize power for the imaginary part.
If this does not work, what does? Should I just design the antenna based on normal principles, and add some sort of radiation absorber around the setup in the real world?