Dielectric lens-corrected horn with a coaxial groove for wide-angle radiation

This paper proposes dielectric lens-corrected horn with a coaxial groove. For covering a wider area with keeping a high gain, this paper newly proposes dielectric lens loaded into a horn antenna for wide angle radiation for 24 GHz radar systems. It can improve the lowest gain of the desired area by optimizing both parameters of the dielectric lens and the primary horn.