WAVEGUIDE ATTENUATOR Russian patent published in 2024 - IPC H01P1/22 

FIELD: SHF technology; attenuators.

SUBSTANCE: waveguide attenuator comprises a section of a rectangular waveguide and an absorber with a constant surface resistance, which has identical matching triangular bevels at the beginning and end and is mounted flush on one of the wide walls of the section of a rectangular waveguide, which is configured to move in a direction perpendicular to adjacent walls. The length of the matching triangular bevels is chosen to be $$L_m=\frac{R_S}{2\rho }\cdot \frac{a}{\ln (1/K_{P1})}$$, where: a is the size of the wide wall of the rectangular waveguide; K_P1, K_P3 are power transmission coefficients for areas of identical triangular matching bevels; K_P2 is the power transmission coefficient for the central region of the absorber; K_P is the power transmission coefficient of the waveguide attenuator; R_S is surface resistance of the absorber; ρ is the characteristic impedance of a section of a rectangular waveguide corresponding to the operating wavelength λ of the input microwave signal,

and the length of the middle region of the absorber is $$L_0=\frac{R_S}{\rho }\cdot \frac{a}{\ln (1/K_{P1})}$$.

EFFECT: increase in the permissible power level of the input microwave signal while maintaining high matching quality.

1 cl, 3 dwg, 1 tbl