Analysis of broadband absorbing magnetic materials / Lilywati Manap

Coating of conducting bodies with thin layers of magnetic materials is used to reduce the reflection and back scattering from the bodies. The concept of transmission line is used to design such Wave Absorbing Magnetic Materials (WAMMs). These WAMMs are made of several dielectric layers, usually on top of a conducting plane. The total absorption of the electromagnetic energy is done in the last layer. Other layers are used to match the wave impedance of the WAMM to that of the incidence media for the normal incidence only and at different microwave frequencies. The approach is easy, practical and flexible, allowing the design of WAMM for specific applications such as Radar Absorbing Materials (RAMs) and Wireless Local Area Networks (WLANs). A wide range of frequencies is considered to maintain a minimum range of reflection.