Design of Jauman absorbers

du Toit Leendert J. (1994)


The electric-screen Jauman absorber, a stratified cascade of dielectric spacers interlaced with resistive sheets, is effective in reducing specular reflection from flat or moderately curved conducting surfaces. Assuming known spacers, the design problem is to find the sheet-surface resistivities which will yield an absorption behavior which meets certain design criteria. Three new and efficient algorithms dedicated to the Jauman problem are outlined, which synthesize absorbers with Butterworth, Equiripple or Chebyshev absorption characteristics. An example of the results obtained, in the form of a design table for practical Chebyshev absorbers, is also presented. These designs are optimal in the sense of maximum bandwidth for fixed passband reflection coefficient magnitude.

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