Microstrip antennas find wide applications in high-speed vehicles, and missiles, tanks, satellite communications, mobile communications and wireless communications etc. The main advantage of these antennas over conventional microwave antenna is light weight, low volume, low cost, planar structure and compatibility with integrated circuits. The present paper deals with the design and simulation of an inset feed rectangular microstrip patch antenna using different dielectric substrate materials such as Arlon AD320, FR4 (Epoxy glass) and Vaccum (Air) and having dielectric constant ( )= 3.2, 4.4 and 1.0 respectively and also comparing their performance characteristics. The resonant frequency of the proposed antenna is designed at frequency of 1.9 GHz, which is lying in the L-band region. The antenna software such as High Frequency Structure Simulator is used for designing of proposed antenna. The simulation results shows the maximum bandwidth is 40MHz and minimum gain is 2dB is obtained using FR4 (Epoxy-glass) substrate whose dielectric constant ( ) = 4.4, at which return loss is -35.67dB. Maximum gain is 9.72dB and bandwidth is 39MHz obtained using Vaccum (Air), whose dielectric constant ( ) = 1.0. However, 6 dB gain and 25MHz bandwidth is obtained using Arlon AD 320A substrate, whose dielectric constant ( ) = 2.2 at which return loss is obtained -24.57dB. The proposed antenna can be used for military telemetry, GPS, mobile phone (GSM) and amateur radio applications.
Design and implementation of slotted metamaterial stacked microstrip patch antenna for broadband applications