Dual-Band, EBG-DGS Wearable Antenna for Emergency Services and Responses in WBAN

Sandhya Mallavarapu, Anjaneyulu Lokam

Abstract


A compact, thin flexible textile antenna integrated with an Electromagnetic Bandgap (EBG) and Defected Ground Structure (DGS) covering the Wireless Local Area Networks (WLAN) bands (2.4-2.485GHz and 5.1-5.9GHz) for emergency services and responses are introduced. The geometry and configuration of the proposed antenna are made from common clothing jeans fabric, which makes the antenna more flexible, thin, and conformal. A new configuration of EBG structure is developed using Minkowski fractal geometry as base geometry and a DGS with the complementary dumbbell-shaped slot to operate in WLAN standards. The EBG structure is used to isolates the antenna from the human body whereas the DGS is used to improve the bandwidth and polarization purity. The prototype covers the WLAN bands with the gains of 3.37 dBi and 6.47 dBi, a bandwidth of 115.9 MHz and 398.06 MHz for the specified wireless bands. The integrated antenna demonstrates an FBR of 16.77 dB and 32.72 dB, the radiation efficiency of 36.9% and 73.8%, and a better cross-polarization level at 2.45 GHz, 5.85 GHz respectively. The antenna shows a high gain and an efficiency of about 70% under the various bending scenario. Thus, the anticipated antenna is the most appropriate and potential candidate for wearable applications in various domains.

Keywords:

Defected ground structure (DGS); electromagnetic bandgap (EBG) substrates; emergency search services; internet ofthings (IoT); wearable antenna; wireless body area network (WBAN); wireless local area network (WLAN)

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Developed by Institute of Industrial Electronics and Electrical Engineering of RIGA TECHNICAL UNIVERSITY