Highly Directive Epsilon Negative Metamaterial-Loaded Circular Patch Antenna for Triple-Band Performance

Abstract

Based on the idea of additional modified mode(s) (Mahdy et al., IEEE Antennas Wirel Propag Lett 10:869–872, 2011), metamaterial-loaded triple-band rectangular patch antennas have been reported in (Mahdy et al., Prog Electromagn Res Lett 21:99–107, 2011). But the idea of additional modified mode(s) to achieve multiband performance in circular patch antenna has not been reported so far. Recently we have reported the idea of “additional modified mode(s)” in circular shaped patch antennas loaded with metamaterials to achieve multiband performance (Ferdous et al., IET Microw Antennas Propag J 7:768–776, 2013). On the basis of the design algorithm reported in (Ferdous et al., IET Microw Antennas Propag J 7:768–776, 2013), in this chapter, a triple-band circular patch antenna loaded with ENG metamaterial has been proposed. The proposed antenna not only provides good resonance, but also ensures satisfactory radiation performances (directivity, radiation efficiency, and gain) for all the three bands. Achieving a triple-band performance has been possible by modifying TM _δ10(1 < δ < 2) mode (using ε negative metamaterial) along with TM₂₁₀ mode modification (due to symmetrical slotting). It is expected that this sort of antenna will be really effective in multiband highly directive applications, especially in satellite communication.