Design of an E shaped patch antenna for GPS and IRNSS application

Microstrip antennas are used for several applications like military, commercial and space craft applications. These antennas exhibit a few constraints such as limited bandwidth and gain due to their resonant nature. In previous works square shaped microstrip patch suspended antenna with a rectangular slot is designed and analyzed for radiating both in the frequency band of GPS and IRNSS. In this context the shape is modified to E shape and the height of suspension and dimension of the patch is reduced significantly. The shape of proposed antenna will provide high gain which is required for the good operation of communication systems. Squat volume, less profile formation, easily mounted, light weight, low cost in fabrication are the notable advantages of this antenna. Co-axial feeding is used for excitation. The substrate FR4 is used for the antenna which has dielectric constant 4.4. Air is used as a second substrate which has dielectric constant 1. Air is used here for easy achievement of multiband frequency operation. The substrate has a size of 100 mm x 100 mm. Designing and simulation of this antenna is done by the help of HIGH FREQUENCY STRUCTURAL SIMUATOR 13.0 software.