Patent ID: 6937110

Claim:
An attenuator for rectangular wave-guides comprised of: a first adapter with a first, variable-section component for the passage, in conditions of perfect adaptation, from a first wave-guide in a first band to a second wave-guide in a second band, and a second adapter with a second variable-section component for the passage, in conditions of perfect adaptation, from said second wave-guide to a third wave-guide in said first band; wherein: said first and second variable-section components are positioned so that they can slide within said second wave-guide, said first and second variable-section components are mobile with respect to each other to define between them, within said second wave-guide, an empty zone with a variable longitudinal dimension, and said first and said second variable-section components each respectively present an initial, pyramidal portion extending towards said first and said third waveguides and a portion with a prismatic section corresponding to the section of the second wave-guide, the prismatic portions terminating with their respective bases orthogonal to the longitudinal axis of said second wave-guide.