Flexible substrates play a vital role in the design of wearable antennas. Analysis and fabrication rectangular microstrip patch antenna have been demonstrated this paper on least explored flexible PVC-based transparent sheet. The substrate’s dielectric constant loss tangent calculated by conducting standard ring resonator test. effect bending an with different diameters along x-axis y-axis has ...

A detailed study about the suitable perturbation element shape and location for tunable BW dual mode microstrip filter which has circular ring resonator is presented. tuning achieved by geometry modification. The explains effect of                       a on stability of center frequency during tuning. Different cases have been studied two shapes element; one rectangular other radial. treated d...