A new approach of edge treatment for compact range reflectors

摘要

A new edge treatment a pproach using resistive cards (R-cards) for compact range reflectors is in-troudced in this paper. This new treatment has proven to be successful in achieving the design goal of reducing the diffracted fields from the reflector edges in the quiet zone. The design key of this new treatment relies on the proper choice of both the re-sistance distribvution and placement of the R-cards in front of the reflector edge. Preliminary analysis and design studies show the potential of this new treatment in reducing the ripple level in the target zone over a wide range of frequencies. The simplicity, flexibility and the low cost of this new approach provide a viable alternative approach to the other edge treatments, such as serrated or blended rolled edges.