Full-wave analysis and design of efficient feeds to the multilayer DRA

Author(s): Bratin Ghosh
Source: FERMAT, Volume 21, Communications 6, May-Jun., 2017

Abstract: An efficient full-wave Green’s function technique is presented for the analysis of the multilayer dielectric resonator antenna (DRA) structure with an arbitrary number of layers. Three planar/non-planar feed configurations are investigated, viz. the microstrip aperture-coupled feed, the probe-coupled feed and the rectangular waveguide fed multilayer DRA. The modes of the multilayer DRA can be identified from the analysis which can be used to explain the broadband nature of the coupling. The layer permittivities and thicknesses are optimized for broadband operation of the antenna structures. The mode-excitation for the antenna structures is thoroughly characterized using the Green’s function approach, providing further insight into the radiation mechanism and bandwidth extension for such structures. Frequency tuning of the antenna structures is also demonstrated by exciting the antenna at a higher order mode, maintaining the broadband characteristics.

Keywords: DRA, multilayer, Green’s function, antenna feed, broadband, slot-coupled, probe-coupled, waveguide

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Full-wave analysis and design of efficient feeds to the multilayer DRA

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