Abstract:
In the world of modern wireless communication systems, it is required to have
a device that can operate for multiple resonating frequencies. For this purpose,
reconfigurable antenna is used that can alter the operating frequency, return loss,
polarization and radiation patterns. Fractal shapes are the most suitable candidate
for reconfigurable antenna due to their multiband resonating behavior. This work
explains the Optimization of Reconfigurable Fractal Gasket Antenna for its operation
for 4G and 5G mobile applications with minimum return losses. Its reconfiguration is
realized through four sets of Radio Frequency (RF) Micro-electromechanical
Systems (MEMS) switches. Depending upon the operating (on/off) conditions of the
switches, the output responses (resonance frequency and return loss) of the
antenna can be varied. The optimization of the structure is carried out by Design of
Experiments (DOE) based Response Surface Methodology (RSM). The Face
Centered Central Composite Design model is used to develop the response surface
models and meta-models for RSM based optimization. The desirability function and
heuristic search algorithm method is used to work out the optimized values of the
design parameters and corresponding output responses. The DOE based RSM is
carried out by using Design Expert 12 software, whereas ANSYS Electronics
Desktop 2017.2 is used to design, simulate and analyze the Antenna structure for 10
MHz to 16 GHz frequency range. In this way, the resulting Antenna is capable of
operating at multiple frequency bands including 4G and 5G mobile applications.
