International Journal of Electronics and Computer Science Engineering
A microstrip patch antenna is designed that have metallic ring coplanar to radiation patch and defected ground structure to enhance the gain is proposed. The design forces conversion of the surface wave energy into the space wave energy by the scattering of surface waves from metallic ring. The microstrip patch antennas is most widely used in wireless communication applications and the demand for its application has been increasing rapidly, especially within the past few decades because of the microstrip antennas have light weight, small size, low profile, cost effective, planner structure, compact and easy fabrication. There are some disadvantages of microstrip patch antennas such as low gain and narrow bandwidth, surface wave excitation. Several techniques are used to remove these disadvantages.