Proposal and characterisation of a CPW feed miniaturized implantable patch antenna for biomedical applications

Now-a-days implantable device for biomedical applications are the interesting research area through all over the world due to the health care industry is highly announced to develop better efficient system which are more suitable and user friendly for patient. The main concern of the implantable device is to monitor various ailments within the body efficiently and then sending the corresponding monitoring signal to the server or base station. In that case, an efficient and miniaturized implantable antenna design is a great concern to ensure proper communication between implanted device and base station. In this paper, an implantable microstrip patch antenna (IMPA) has been proposed and characterized for implantable biomedical applications in the frequency of industrial scientific and medical (ISM, 2.4 GHz to 2.48 GHz) band. The total size of the proposed antenna is 12×12×2 mm³. Here patch of the antenna is designed on a dielectric substrate named Teflon having dielectric constant of 2.1 and it also have tangent loss of 0.00028. This proposed antenna is designed and simulated by using CST (Computer Simulation Technology) microwave studio 3D electromagnetic solver. The proposed IMPA shows good results such as lower return loss (-31.628 dB), better gain (-13.6 dB), wide bandwidth (727 MHz), VSWR (1.05) very close to unity, good impedance matching as well as miniature in size (volume of 288mm³).