Apparatus for attenuating traveling wave reflections from surfac

Details Apparatus for attenuating traveling wave reflections from surfac Apparatus for attenuating traveling wave reflections from surfac

1996-04-22

1998-02-24

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Radio wave absorber

342 2, 342 4, H01Q 1700

Patent

active

057215510

ABSTRACT:
An apparatus for attenuating traveling wave reflections from a surface, due to an impedance mismatch between the surface and free space. The apparatus includes a resistive element having an impedance between that of the surface and free space. The resistive element is positionable relative to the surface so as to minimize the impedance mismatch between the surface and free space. The resistive element is preferably a resistively graded element, which includes a forward end with an impedance approaching the impedance of the surface. An aft end of the resistively graded element has a high impedance relative to free space. The aft end is positionable sufficiently distant from the surface so as to minimize any traveling wave reflection due to impedance mismatch between the surface and free space.

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