“…In recent years, there have been many approaches to broaden the beam-width of the linear-polarization antenna, such as adding the parasitic structure, [1][2][3] reshaping the ground plane of the antenna, [4][5][6] and materials-based methods, including adding the thickness of the substrate, 7,8 the composite dielectric substrate, 9 changing the radiation section to form a wide beam current distribution, 10 zeroth-order resonance, 11 and even-mode resonance, 12 and so on. [13][14][15] The above methods mostly realize the wide beam characteristics by sacrificing other performance of the antenna, such as size, profile, cross-polarization, and so on.…”