Design and Simulation of Stair Shape Planar Antenna Using Vias Technique for Biomedical Applications

This paper presents, a stair shape patch antenna for medical body area network (MBAN) applications. The vias technique in the proposed antenna design is to improve the gain that radiates at 2.4 GHz ISM band without and with body phantom model. The backward radiation from antenna to the body phantom is reduced by placing a reflector plate at 2mm below the antenna. The gap between designed antenna and body phantom is kept 2mm, otherwise gain of the intended antenna will reduce significantly. The simulated antenna resonate frequency at 2.4 GHz with impedance bandwidth of 66.66% and 38.3% in free space and human body respectively. The operating frequency range of purposed antenna is in between 1.8 GHz and 3.6 GHz in free space. The purposed antenna broad side gain is 7. 2dBi in free space. The parametric analysis of antenna has been done to achieve the best performance of physiological parameter assessment. The purposed antenna has been modelled and simulated using ANSYS HFSS software with appropriate boundary conditions. The patch antenna is being preferred to mount on human body surface for transmission of bio-signals. An attempt has been made to propose stair shape patch antenna for achieving the impedance bandwidth within Spectrum range of Medical Body Area Network (MBAN).