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        The design of broadband radar absorbing surfaces

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        Author
        Go, Han Suk
        Date
        1990-09
        Advisor
        Atwater, H.A.
        Second Reader
        Janaswamy, R.
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        Abstract
        There has been a growing and widespread interest in radar-absorbing material technology. As the name implies, radar absorbing materials or RAM's are coatings whose electric and magnetic properties have been selected to allow the absorption of microwave energy at discrete or broadband frequencies. In military applications low radar cross section (RCS) of a vehicle may be required in order to escape detection while a covert mission is being carried on. These requirements have led to the very low-observable or stealth technology that reduces the probability of detection of an aircraft. The design of radar absorbing materials is limited by constraints on the allowable volume and weight of the surface coating, and it is difficult to design a broadband radar absorbing structure in limited volume. This thesis investigates the use of lossy dielectric materials of high dielectric permittivity in multi- layer composites for the production of low radar cross section (RCS). The analysis is done by computing the plane wave reflection coefficient at the exterior surface of the composite coating by means of a computer program which selects layer parameters which determine low reflection coefficients for electromagnetic radiation under constraint of limited layer thickness as well as maximum frequency bandwidth.
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        Approved for public release, distribution unlimited
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        http://hdl.handle.net/10945/30692
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          Homeland Security Affairs Journal, Supplement - 2012: IEEE 2011 Conference on Technology for Homeland Security: Best Papers 

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