Analysis and design of a composite left-/right-handed leaky wave antenna based on the H10 rectangular waveguide mode

• Main Authors: T. F. Eibert, Y. Weitsch
• Format: Article
• Language: deu
• Published: Copernicus Publications 2008-05-01
• Series: Advances in Radio Science
• Online Access: http://www.adv-radio-sci.net/6/49/2008/ars-6-49-2008.pdf

The presented "open" composite left-handed/right-handed (CRHLH) substrate integrated waveguide performs well as a low-profile leaky wave antenna. This design is distinguished due to the fact that it is derived from the approved equivalent circuit model of the <i>H</i>₁₀ rectangular hollow waveguide mode. The wave propagation behaviour is visualised by the dispersion diagram calculated by two different methods, infinite periodic full-wave simulation and Matrix-Pencil analysis of driven field solutions. The periodic configuration is also analysed in terms of the Bloch impedance. Although FR-4 serves as substrate the antenna features an efficiency of about 50% to 60%. The radiation performance demonstrates nearly backfire to almost endfire scanning capability of the antenna by mere frequency variation. Broadside radiation is possible due to the balanced state at 4 GHz.