“…Many methods for designing multi-band antennas have been reported in the previous literature, such as the resonator loaded slot multi-band antenna reported in [11], triple-band antenna design using annular ring reported in [12], multi-band antenna design based on Genetic Algorithm reported in [13], dual-band circularly polarized DRA (Dielectric resonator antenna) for sub-6 GHz reported in [14], multiband slot antenna design reported in [15][16][17], hexagonal gasket fractal multi-band antenna reported in [18,19], multi-band antenna design using Defected Ground Structure (DGS) reported in [20][21][22], and low profile multi-band PIFA antenna design reported in [23]. These antennas have many advantages, but there are some performances still to be improved, such as poor radiation properties (backside radiation, non-stable radiation for each band, large minor lobes), cost, and complexity for integration in circuits.…”