Analysis and design of a composite left-/right-handed leaky wave antenna based on the iH/isub10/sub rectangular waveguide mode

摘要

The presented "open" composite left-handed/right-handed (CRHLH) substrateintegrated waveguide performs well as a low-profile leaky wave antenna. Thisdesign is distinguished due to the fact that it is derived from the approvedequivalent circuit model of the H₁₀ rectangular hollow waveguide mode.The wave propagation behaviour is visualised by the dispersion diagramcalculated by two different methods, infinite periodic full-wave simulationand Matrix-Pencil analysis of driven field solutions. The periodicconfiguration is also analysed in terms of the Bloch impedance. Although FR-4serves as substrate the antenna features an efficiency of about 50% to 60%.The radiation performance demonstrates nearly backfire to almost endfirescanning capability of the antenna by mere frequency variation. Broadsideradiation is possible due to the balanced state at 4 GHz.