Dr APJ Abdul Kalam Technical University Uttar Pradesh, Lucknow

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.

LNA performance decides the performance of wireless RF system. Many tradeoffs include in the design of LNA. The challenges involved in the design of the RF system are presented in this thesis. Description of the all-important parameter performance is given in thesis.

Multiphysical phenomena are neither new nor rear, it started with human beings. Basically
multiphysics is interdisciplinary term and originate with collaboration of various research
fields. Multiphysical phenomena exist in both form either naturally or manmade in nature.
We breathe in a multiphysics world. Our real life processes from morning to evening are
inherently multiphysics. From electron to atom, atom to galaxies and from amino acid to
living organisms, naturally they interlinked with various physical phenomena which is

In this work filtering antenna or filtenna has been designed successfully. filtering antenna
or filtenna is a combination of filter and an antenna to work as a single unit. The antenna
act as a last resonator for the integrated filter. This enhances the bandwidth of the antenna
and also the frequency selectivity improves.
First, the rectangular microstrip patch antenna that is fed with quarter-wave transformer is
designed for 2.45GHz frequency having bandwidth of around 58MHz. Antenna is designed