LOW-DIMENSIONAL MICROWAVE PHOTONIC CRYSTAL Russian patent published in 2016 - IPC H01P1/00 

FIELD: physics.

SUBSTANCE: elements of a waveguide microwave photonic crystal, which form a periodic sequence, are dielectric layers which completely fill the waveguide on the cross-section, and thin metal plates which partially cover the cross-section of the waveguide and which form a gap between the plate and the wide wall of the waveguide on its entire length. Gaps between odd-numbered metal plates and the waveguide are situated in the upper wide wall of the waveguide, and gaps between even-numbered metal plates and the waveguide are situated in the lower wide wall of the waveguide.

EFFECT: reducing the longitudinal dimension of the photonic crystal along the direction of propagation of electromagnetic waves to a value less than the fundamental wavelength.

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