Abstract

Microstrip antenna with defect on ground plane is gaining advancements in improvement of antenna parameters such as bandwidth, gain and enhanced radiation pattern. Using defected ground structures on ground plane. In this paper, a concept of concentric defect with different variation in the shapes is studied, and are designed to provide some better performance characteristics, lower resonating frequency and wide bandwidth. The set of prototypes are simulated and examined experimentally, measured data is compared with simulated as well as with conventional MSA. Detailed study to find the effect of the defect on the parameter is done. The antenna designed are fabricated and tested both using HFSS and VNA is done, antenna is found have good agreement with both experimented and simulated results. These antennas find their applications in ISM bands since it’s resonating in ISM band of Frequencies.

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