Assessment of Compact Circular Microstrip Antenna using Taguchi’s Optimization for Wearable Biomedical Applications

Abstract

This work presents a methodical and effective means of evaluate and choose design constraints using Taguchi’s method in order to design compact and high gain antenna. This method is applied for inset feed circular microstrip patch antenna with different geometries to tune the impedance to the desired value and the prototype is fabricated using the optimized results so as to validate the technique for wearable devices in biomedical applications with 2.45 GHz. The main contribution is towards miniaturization and design simplicity. It is observed that the optimized antenna design provides improved performance with an operational bandwidth of around 100 MHz and is compact in size measuring 45 x 40mm mm2 having a circular patch of radius 16.65 mm fabricated with economic and easily available substrate FR-4 with a 4.4 dielectric constant, 1.6 mm thickness, and a 0.02 loss tangent. Results from simulation and measurement exhibit good agreement and Taguchi’s method is found to be effective for antenna size reduction by 34.53% .