Parametric Effect for Improvement of Microstrip Patch Antenna Performance

Abstract

The quality factor is a figure-of-merit that is representative of the antenna losses. Typically there are radiation,
conduction (ohmic), dielectric and surface wave losses present in planar antennas. Planar antennas are high-Q devices with Qs
sometimes exceeding 100 for the thinner elements. But, high-Q elements have small bandwidths. Also, the higher the Q of an
element, the lower is its efficiency. Increasing the thickness of the dielectric substrate will reduce the Q of the planar element and
thereby increase its bandwidth and its efficiency. There is a need to analyse individual quality factors also and optimize them to
achieve a significant trade-off between gain and losses. When the losses are low but not lowest the radiation efficiency is also
found to be optimum .In this Paper I have analyse two different planner antenna using two different materials such as FR4 and
Teflon (PTFE). I have designed planner antenna using computer simulation technology (CST).After analysing the result of two
different materials of planner antenna will the different types of Quality factor losses. I can conclude that the Teflon (PTFE)
material is best with the compare FR4. I have analysing two different planner antenna using two different feeding techniques such
as coaxial feed and microstrip feed line. After analysing the result of two different feeding techniques of planner antenna I can
conclude that the microstrip feed line with using Teflon (PTFE) material achieve high gain and directivity compare to coaxial feed
techniques. After I have analyse two different planner antenna using Teflon (PTFE)
Material with and without slit. I can conclude that with slit design of planner antenna is better than
Without slit design because in with slit design of MPA achieve dual band BW.