| 摘要 |
PURPOSE:To enable an MLS bearing guiding apparatus to be provided together with an ILS localizer without deteriorating the performances of both the apparatus by setting part of the radiating elements of the ILS localizer to the heights which do not hide the effective aperture of the MLS bearing guiding apparatus. CONSTITUTION:An ILS localizer having radiating elements 1 and 5 supported by support legs 2 and an MLS bearing guiding apparatus 3 are provided. Among a plurality of the radiating elements of the ILS localizer, the height h2 of a plurality of the elements 5 on a central portion are set higher than the height h1 of the other radiating elements 1 and the height h2 is selected as small as possible within a range wherein the effective aperture 4 of the MLS bearing guiding apparatus 3 is not hidden. The central radiating elements 5 set higher than the others are supported by a support member 6 to the support legs 2 of the elements 1 near the elements 5. The change in the performance of the ILS localizer due to the high central portion is compensated for by an attenuator inserted in a feeding system.
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