%0 Journal Article %T Q-factor investigation of antennas over metamaterials substrates %+ Institut d'Électronique et des Technologies du numéRique (IETR) %+ Pôle Electronique et Systèmes %A Collardey, Sylvain %A Sharaiha, A. %A Abdouni, W. %A Niamien, Constant %A Tarot, A.-C. %< avec comité de lecture %@ 0895-2477 %J Microwave and Optical Technology Letters %I Wiley %V 52 %N 6 %P 1321-1325 %8 2010-06 %D 2010 %R 10.1002/mop.25213 %K antenna %K Q factor %K metamaterials %K efficiency %Z Engineering Sciences [physics]/Electromagnetism %Z Engineering Sciences [physics]/Materials %Z Engineering Sciences [physics]/ElectronicsJournal articles %X In this article, antennas over metamaterials substrates are investigated with the radiating Q factor determined by using a time‐domain method.The main objective is to illustrate the electromagnetic behavior of this kind of complex structure by calculating its energy budget (stored and radiated energies). An example of a patch antenna using such materials is analyzed and experimental results are presented. %G English %L hal-02428429 %U https://hal-normandie-univ.archives-ouvertes.fr/hal-02428429 %~ UNIV-NANTES %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ IETR %~ CENTRALESUPELEC %~ COMUE-NORMANDIE %~ UR1-HAL %~ UR1-MATH-STIC %~ UR1-UFR-ISTIC %~ IETR-CUTE %~ IETR-ADH %~ TEST-UR-CSS %~ IRSEEM %~ UNIV-RENNES %~ UNIROUEN %~ INSA-GROUPE %~ ESIGELEC %~ UR1-MATH-NUM %~ IETR-STAR %~ NANTES-UNIVERSITE %~ UNIV-NANTES-AV2022