Bandwidth Improvement and Reduced Size MPA Design using HIS

Recently, there has been extensive research on high impedance structure (HIS) and their applications in microstrip antennas and transmission lines. These periodic structures have unique property of preventing the propagation of electromagnetic waves for specific frequencies and directions which are defined by the shape, size, symmetry, and material used in their construction. These structures also facilitate in bandwidth enhancement of planar antennas. In this article, a mizrostrip patch antenna (MPA) is designed to operate at 3.5 GHz. Then a mushroom type HIS ground plane is designed in the operating band of MPA which is further integrated. Aim of this configuration is to enhance bandwidth of the MPA through incorporation of HIS plane, Bandwidth of the MPA is evaluated with and without HIS plane. All the designs and simulations are carried out in CST microwave studio.