The apparatus comprises an arrangement of resonant cells, {HEAD ~ each resonant cell} being of {TAIL ~ small dimension} relative to the wavelength 
of
The apparatus comprises an arrangement of resonant cells , { HEAD ~ each resonant cell } being of { TAIL ~ small dimension } relative to the wavelength
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH