Dépôt numérique

Traveling-wave multiple beam slot antennas in substrate integrated waveguide.

Peters, Florian D. L. (2014). Traveling-wave multiple beam slot antennas in substrate integrated waveguide. Thèse. Québec, Université du Québec, Institut national de la recherche scientifique, Doctorat en télécommunications, 204 p.

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This thesis presents an enhanced way of designing traveling-wave antennas built with slotted substrate integrated waveguides. A novel configuration of vias is derived for controlling the slotted element phase by >30°. A straightforward design method that includes slot excitation from either side is set up. It is very useful specifically for high width‐to-height waveguide ratios as well as both off-resonant and mismatched slots, where conventional methods have been shown to be less performing. The validation has revealed a radiation pattern with low SLL of -27 dB, and zero degree broadside beam. Measured antenna arrays yielded a low (formula). Nevertheless, the project has exposed reflections from the applied transition and fixture at the end of the array that degrade the results. The new concept has been completed with a published MATLAB design guide script. When applying the vias to steer to a particular angle, the shifted beams do reveal the same range of beam width and low SLL as the initial zero degree beam which outperforms the State-­‐of-­‐the-­‐Art. A solution comprising slot antenna sub-­‐arrays that are excited from either side is further presented in this work. Four particular beams from –20° to +20° -­‐ have been designed with good matching of better -­‐10 dB reflection, and a maximum directivity of about 16 dBi, exhibiting an efficiency of nearly 70 %. A new very practical millimeter-­‐wave transition is proposed at the end of this work. It addresses the shrinkage tolerances typically seen with LTCC material. The (formula)of the latter could have been determined through a LINE and THRU measurement. A strong dispersion of the dielectric constant from 9.9 to 6.7 has been the important outcome of this task. This solution represents the first purely intra-­‐substrate experiment allowing to avoid the uncertainties that occur with the effective permittivity. The transition shows a good insertion loss smaller than 0.7 dB and a good matching with RL smaller than 10 dB. To sum up, a bunch of new tools has been conceived with this work to enhance the performance of very thin slotted traveling-­‐wave-­‐antennas substantially.

Type de document: Thèse
Directeur de mémoire/thèse: Denidni, Tayeb A.
Co-directeurs de mémoire/thèse: Tatu, Serioja O.
Informations complémentaires: Résumé avec symboles
Mots-clés libres: Antenna arrays; Graphic methods; Signal flow graphs; Slot antennas; Alternative configurations; Appropriate models; Phase-shifting; Radiating elements; Radiation performance; Slotted waveguides; Transmission phase; Traveling-wave slot antennas; Substrate integrated waveguides
Centre: Centre Énergie Matériaux Télécommunications
Date de dépôt: 17 mars 2015 20:39
Dernière modification: 16 mars 2016 14:30
URI: http://espace.inrs.ca/id/eprint/2627

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