Propagation Properties of a Tunable Impedance Waveguide
نویسندگان
چکیده
In this paper propagation properties of a parallel-plate waveguide with tunable artificial impedance surfaces as sidewalls are studied both analytically and numerically. The impedance surfaces comprise an array of patches over a dielectric slab with embedded metallic vias. The tunability of surfaces is achieved with varactors. Simple design equations for tunable artificial impedance surfaces are presented. The analytical results are verified with numerical simulations. The results of this paper show that although phase shifting is achieved by using tunable impedance surfaces as sidewalls of waveguides, unwanted mode conversion occurs as well.
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