Nidhi Srivastava (1805267005)

This study comprises of two stages. In the first stage investigation of 5 substrate materials is done to find out which one among them is the best. And then in the second stage antenna parameters are improved by using a superstrate cover of Teflon.
In the first stage a total of 5 discrete substrate materials have been analyzed for antenna throughput. Graphene centered circular patch microstrip antenna using Gallium Arsenide as substrate shows maximal return loss of -47.607 dB with a VSWR of 1.008 followed by Arlon Ad 430 which has return loss of -40.854 dB with VSWR of 1.018.
In the second stage a Graphene centered circular patch with a superstrate cover mounted over graphene patch is designed and performance is analyzed. Microstrip feeding is used to feed the antenna. Antenna design with Teflon cover shows better performance in terms of reflection loss and VSWR which are -42.437 and 1.015 respectively at 6.336 THz. Antenna gain is increased by 5.56% and 48.61% increase in bandwidth is observed.
Also, the best antenna performance is seen when superstrate cover thickness is almost the average of circular patch and substrate thickness.