Self-multiplexing textile antenna aided by SIW cavity for wearable applications

Abstract

ABSTRACT In this paper, a self-multiplexing textile antenna aided by a substrate integrated waveguide (SIW) is designed for wearable applications. The proposed antenna operates at wireless body area network (WBAN) frequencies such as 5, 5.2, 5.5 and 5.8 GHz. Extended unequal half mode substrate integrated waveguide (HMSIW) cavities are utilised for self-multiplexing operations with the open-ended magnetic wall working as the radiator for the proposed textile antenna. All the four unequal HMSIW cavities share the same electric wall which is realised using brass eyelets. The textile antenna is fabricated and the antenna parameters are measured to elucidate the proposed antenna concept. The port isolation has achieved above 33 dB between any ports. The measured gains for the four frequencies are above 5.1 dBi with high efficiency. The proposed multiplexing antenna is designed in 90 × 65 * 0.57 mm3 dimensions and the proposed antenna has exhibited good performance which makes it suitable for integrating with wearable devices and obviating the extra multiplexer circuits.