Beam-Steerable Antenna Composed of Metalines

A beam-steerable array antenna composed of metalines is presented. The footprint occupied by the arrayed metalines is smaller than that for a corresponding array of patches. The height of the antenna is extremely small: on the order of 1/100 of the operating wavelength. A circularly polarized beam formed at a fixed frequency is steered over an angle range of approximately 70 degrees in the elevation plane. The antenna characteristics, including the radiation pattern, VSWR, and gain, are described.