In this work, three designs of textile antennas, namely, a rectangular microstrip patch antenna, annular slot antenna, and planar inverted-F antenna (PIFA), operating in the 2.45 GHz WLAN band were developed for smart clothing applications. Conductive textile, a copper-plated polyester fabric, was used for fabricating antenna radiators and grounds. An insulating neoprene fabric with a thickness of 4 mm and a permittivity of 1.5 was used for preparing the substrates. The textile patch antenna achieved a maximum gain of 5.96 dBi and a bandwidth of 4.6%. The annual slot antenna showed a moderate gain and bandwidth of 2.9 dBi and 13.1%, respectively. The PIFA achieved the widest bandwidth of 31% but the smallest gain of 1.2 dBi. Furthermore, the performance deterioration of the proposed antennas under various bending conditions was analyzed to evaluate their suitability for wearable applications. Moreover, two 2 × 2 patch and slot antenna arrays were assembled to increase gain and bandwidth. The measured results proved that the developed antenna designs provide superior performance.
W pracy przedstawiono wyniki badań płaskiego heksagonalnego szyku antenowego, który może zastąpić konwencjonalne dipolowe szyki antenowe nieprzydatne w przypadkach podwyższonych wymagań aerodynamicznych lub nawet estetycznych. Omówione zostały także problemy syntezy charakterystyki kierunkowej oraz sposoby przewidywania charakterystyki promieniowania szyku antenowego przy wykorzystaniu zmierzonych charakterystyk poszczególnych elementów.
EN
The article presents results of investigation of the hexagonal planar antenna array which can be used instead of the conventional dipole antenna array in case of the higher aerodynamics or even esthetic demands. The problems of the synthesis of the radiation patterns and methods of the prediction of the radiation patterns based on the measured characteristics are also discussed.
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