Designing of a Compact Microstrip Antenna Resonating at 5.6 GHz by Using Size Reduction Technique

in this work a compact microstrip antenna has been design and developed. This antenna incorporated with one rectangular DGS like etching structure on ground surface of the antenna to minimize the size. Unlike normal antenna DGS introduces discontinuities on the signal plane which in turn disturbs shielded current distribution in signal plane. Due to which apparent permittivity of the substrate varies as a function of frequency and play important role in the performance of the antenna. A size reduction of 56% at 5.66 GHz was observed. We also calculate all other parameters like apparent permittivity, phase velocity of wave. Here we implement proportional formula of defect in three steps to get compact size of antenna which has higher impedance bandwidth w.r.t conventional patch antenna approximately 45.82 MHz. For this work we care the overall performance like radiation pattern, efficiency, gain, directivity, polarization should not degraded by inserting slot. Diversity control of antenna is also achieved by introducing the DGS. Here we also observe that performance of antenna is a function of shape, size, and position of DGS which is inserted. Here we use the couple feed to energize the antenna. A high permittivity substrate is used below the connecting feed to reduce the radiation loss.