Article,
A 5GHZ FLEXIBLE COMPACT MICROSTRIP PATCH ANTENNA FOR WBAN APPLICATIONS: DESIGN, SIMULATION AND PERFORMANCE ANALYSIS
The International Journal of Ambient Systems and Applications (IJASA), 11 (1/2/3/4): 14 (December 2023)
DOI: https://doi.org/10.5121/ijasa.2023.11401
Abstract
This paper introduces the design and performance analysis of a compact flexible rectangular microstrip
patch antenna for wireless body area network (WBAN) applications. In order to provide flexibility, the
proposed antenna is designed to operate at 5 GHz band using 1 mm thick polyimide substrate with relative
permittivity of 3.5 and the inset-fed technique is used for better impedance matching. The patch antenna
having dimensions of 23 mm ×22.72 mm × 1 mm is designed to cover Wi-Fi services of 5G band and is
simulated using CST Microwave Studio. Parametric studies are conducted to investigate the antenna
performance and its suitability for WBAN applications. The designed antenna resonates at 5 GHz and
exhibits –10 dB impedance bandwidth of about 3.52% (5.085-4-909 GHz) and covering a total bandwidth
of 176 MHz. The antenna achieves good impedance matching with directivity of 5.716 dBi, directional
radiation pattern, and a high radiation efficiency of 89% at the 5 GHz resonant band. By locating the
proposed antenna on a phantom human body model, it maintains positive gain, efficiency, and acceptable
specific absorption rate (SAR) at the resonant frequency. The results of this study demonstrate the potential
of the proposed design to enhance the performance and efficiency of the proposed patch antenna and can
be a suitable candidate for WBAN applications in the 5 GHz band 5G wireless communications.
