Why does antenna loading actually occur? In placing an object in the reactive near field the antenna resonance frequency shifts, but why? Is there a 'physical' connection (inductance/capacitance in the space between them) that causes the antenna to appear longer, thus alter the resonance frequency?
Thank you
In the Reactive Near Field region of the antenna the E and H fields are not orthogonal, so any object coupled to the antenna in this region will distort the radiated pattern and affect the resonant frequency.