A solution for ILS disturbance due to a building

We present a solution to the problem of ILS disturbance due to an aircraft hangar to be constructed at Toulouse International Airport, France. Before construction, the problem is analysed with the full-wave ILS simulator `ELISE'. A solution in the form of a diffraction grating is then proposed, optimized and re-simulated with ELISE. Simulations demonstrate that the proposed solution easily satisfies the CAT3 criteria. The construction of the building has begun (mid December 2011) and the diffraction gratings will be installed in the Summer. At the time of writing we await confirmation of patens that we have filed concerning more compact structures that we will present during the conference.