A solution to the problem of interference to a radio station's transmission by reflection of its own signals from nearby metallic objects is revealed. This is done by simply introducing another reflection out of phase but equal (or approximately so) in amplitude. Out-ofphase wave interference is thereby created which effectively reduces the over-all reflection amplitude. This is accomplished by installing, or arranging for, a secondary reflector in front of the offending reflector at a critical spacing. Restoration to use is now possible for many unflyable portions of air navigation radio aids such as VHF Omniranges and Instrument Landing Systems which are operated by the Federal Aviation Agency as well as other entities. It represents an answer for the problem of radio wave reflections from nearby metallic objects in most cases when that situation causes difficulty. (Author)
Cancellation of Radio Wave Reflections
1964
31 pages
Report
Keine Angabe
Englisch
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