A novel phase shifting surface-integrated horn antenna

We present the design of a phase shifting surface-integrated horn antenna (PSSIHA) which consists of the horn antenna and planar array lens. Planar array lens just needs one type of antenna-filter-antenna element and is applied to obtain a relatively uniform phase distribution on the aperture of the horn antenna. The PSSIHA prototype has been fabricated. Measured results match with simulated ones well. The PSSIHA achieves a higher gain and a better directivity than the horn without the lens.