“…With advances in wireless systems, the need for broadening frequency bandwidth and sharing multi-frequency bands has increased. Several conventional antennas, such as helical [2], horn [3], monopole [4][5][6], wide slot [7,8], and electric-magnetic dipole [9], are also available for wide impedance bandwidth applications. Additionally, multiband resonance can be achieved by adding a parasitic line or a shorted parasitic element to the main monopole patch [10,11].…”