Remarks on Anti-RFI Fences

In anti-RFI applications such as shielding two radars from one another, the protection obtained from a fence may be significantly less than the diffraction loss introduced by the fence. The effect can be alleviated by using an inner and an outer fence. This tandem design is also advantageous for anticlutter fences, because a given diffraction loss can be obtained with smaller and less costly structures. If the diffraction loss is to be augmented by an edge treatment, the tandem design makes possible the equivalent of stagger tuning.