MICROWAVE PHOTONIC CRYSTAL Russian patent published in 2018 - IPC H01P1/00 

FIELD: measuring equipment.

SUBSTANCE: using for measurements using microwave technology. Essence of the invention is that a microwave photonic crystal is made in the form of a rectangular waveguide containing even and odd elements, periodically alternating in the direction of propagation of electromagnetic radiation, odd elements of the photonic crystal are made in the form of rectangular metal resonant diaphragms with rectangular apertures which long sides are parallel to a wide wall of the waveguide, completely overlapping the waveguide along the cross section, even elements of the photonic crystal are sections of the rectangular waveguide between the diaphragms, wherein two diaphragms are the edge elements of the photonic crystal, and one central, wherein the microwave photonic crystal further comprises a matched load coupled to one end of the photonic crystal, a Y-circulator, one of the outputs of which is connected to the opposite end of the photonic crystal, a constant voltage source in the aperture of the central diaphragm is located, at least one n-i-p-i-n diode structure which n-regions are galvanically connected to the long sides of a hole of a grounded diaphragm, a p-region of the n-i-p-i-n diode structure is connected to a positive pole of the source of the constant voltage, dimensions of the holes of resonant diaphragms, except for the central diaphragm, are: length a₀=20⋅a/23 and width b₀=b/5, thickness of the diaphragms is 0.0005⋅b<d<0.003⋅b, the length of even elements of L is 1.8⋅b<L<2.5⋅b, while a and b are the dimensions of the wide and narrow walls of the waveguide, respectively.

EFFECT: achieving the frequency independence of the transmission coefficient of an electromagnetic wave in the allowed region of the microwave photonic crystal, while providing the possibility of electrical control over the characteristics of the impurity mode of damping of oscillations.

4 cl, 8 dwg