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