The defects in the form of slots have been employed microstrip antenna either on patch or ground plane to yield frequency reduction. However, reported work does not provide any comparative study that highlight upon and cross-polar level reduction achieved using these various shape slot/defects. This paper provides a thorough for different compact variations antennas obtained plane. Amongst all,...

graphene sheet including single vacancy, double vacancy and stone-wales with armchair and zigzag structure was simulated using molecular dynamics simulation. the effect of defects on shear’s modulus, shear strength and fracture  strain was investigated. results showed that these shear properties reduce when the degrees of all kinds of defects increase. the dangling bond in sv and dv defected gr...

This paper presents a novel defected ground structure-based slotted circular patch antenna for mm-Wave application. A with compact size of 10 mm×8 mm×0.75 mm is fabricated in the lab. The designed has 2 GHz impedance bandwidth that covers frequency range 42GHz to 44GHz. It achieves directional radiation pattern millimeter-wave applications and maximum realized gain 6 dBi at operating 42.65 GHz....