Yes, I meant mulit-path, but what would you say is the difference? I mean - I know it won't create the sound of comb-filtering, but AFAICS it IS comb filtering in the RF-domain in exactly the same way as audio waves do in the air in a different frequency range.
Comb filtering is the result of
multiple sources (acoustical transducers or speaker cabinets) delivering a broad frequency range of
direct energy into the same space at the same time and having the energy levels of the individual frequencies add or subtract due to time arrival differences thus producing an uneven SPL across the reproduced frequency range.
Multi-path occurs when there are multiple propagation paths from a
single source (transmit antenna);
one direct, the others reflected.
Multi-path is the physical occurrence and does not necessarily have to result in self interference, and in fact does not the vast majority of the time. Comb filtering
is the result, and generally a detrimental one.