A Compact CP Wearable Antenna backed by AMC Array for WBAN/WLAN Applications

In this paper, a simple and compact wide-slot circularly polarized antenna backed by a 2×2 artificial magnetic conductor (AMC) array is presented for 5.8 GHz wireless body area network (WBAN) applications. An inverted T-shaped parasitic strip at the open end of a microstrip line extension and slot modification was applied to attain wideband CP. The total footprint of the proposed antenna is only 30.9 × 30.9 mm
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board of semi-flexible Rogers RT-Duroid 5880 substrate. Full-wave EM simulation results have been presented in numerous studies, both in free space and in proximity to the human body. The integrated design provided an impedance bandwidth |S
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| ≤ -10 dB of ~9.41-percent (5.57-6.12 GHz) and an AR bandwidth ≤ 3 dB of 9.8-percent (5.24-5.78 GHz). Furthermore, over a gap of 3 mm from the human body, the final design achieved peak gain and total efficiency enhancements of 8.5 dBi and 91.4%, respectively. A very low specific absorption rate, compact size, and high gain make the proposed design a good candidate for most off-body wearable applications.