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A single-arm rectangular spiral antenna with a tilted beam working in 1.9GHz–2.2GHz frequency band is presented in this paper. The spiral is printed on a finite-size dielectric substrate backed by a finite-size conducting plane. Both the substrate and conducting planes are square with a side length L of less than 0.6λo (λo: wavelength in free space). The radiation pattern is dependent on the outermost...
This paper presents the design and experimental verification of the ridge gap waveguide, appearing in the gap between parallel metal plates. It also describes the basic ideas of how local waveguides and transmission lines can propagate along desired paths in the air gap between two metal surfaces. The principle of operation is related to the performance of artificial magnetic conductors, AMC surfaces...
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