A Parasitic Microstrip Linear Array With Customizable Tilted-Beam Radiation

A single-layer microstrip parasitic array with customizable tilted-beam radiation performance is presented. The antenna consists of one driven sub-wavelength patch and eight parasitic patches and the tilt angle is determined by the refractive index distribution of the patch units. The index-modulation principle is derived based on the generalized law of refraction. According to this principle, the size of the patch unit can be adjusted to control the tilt angle. This paper uses I-shaped patch unit to conFigure the tilted-beam antenna. Simulation results manifest that the antenna has a large tilt angle of 60° off boresight and a broad bandwidth of 19.31%.