MEMS-based reconfigurable and flexible antenna for body-centric wearable applications. Issue 10 (3rd July 2022)

• Record Type: Journal Article
• Authors: Prudhvi Nadh, B.; Madhav, B. T. P.; Siva Kumar, M.; Anil Kumar, T.; Venkateswara Rao, M.; Mohan Reddy, S.S.
• Is Part Of: Journal of electromagnetic waves and applications. Volume 36:Issue 10(2022)
• Page Start: 1389
• Page End: 1403
• Publication Date: 2022-07-03
• Subjects: Flexible -- reconfigurable -- MEMS -- wearable applications; Electromagnetic waves -- Periodicals; Electromagnetic devices -- Periodicals; 621.3
• DOI: 10.1080/09205071.2022.2028682
• Languages: English
• ISSNs: 0920-5071

Abstract

Abstract : The current study presents an MEMS switche-based frequency reconfigurable antenna for conformal and wearable applications. This is a circular ring-shaped monopole antenna loaded with spokes attached to the circular ring and fed by co-planar waveguide feeding (CPW). The antenna is designed on the flexible Liquid crystal polymer substrate material with 40 × 28 × 0.1 mm 3 . The reconfigurability of the antenna was achieved by placing RF MEMS SP4 T (ADGM 1304) switches. The antenna has a dual-band with reconfigurability at 2.5 GHz (2.12–2.9 GHz) and 5.4 GHz (4.5–5.8 GHz). The measured results demonstrate the antenna operates at 1.73–3.2 GHz and 4.54–6.3 GHz with resonating frequencies of 2.5 and 5.6 GHz. When placed on the human body, the gain of the antenna variesg from 5.32 to 8.38 dBi for different reconfigurable conditions. SAR analysis results in between 0.15 W/Kg and 1.37 W/Kg for different switching conditions, and the simulation results match with the measurements.