Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01Q
ANTENNAS, i.e. RADIO AERIALS
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15/00
Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
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H01Q15/02
Refracting or diffracting devices, e.g. lens, prism
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H01Q15/10
comprising three-dimensional [3D] array of impedance discontinuities, e.g. holes in conductive surfaces or conductive discs forming artificial dielectric
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