Log-Periodic Dipole Array (LPDA) Antenna and Method of Making

摘要

A log periodic dipole array (LPDA) antenna including a first antenna element, a second antenna element and a pair of transmission line structures is provided herein. The first antenna element is fabricated as a continuous piece of conductive material to include a plurality of dipole elements extending outward from a center conductor. The second antenna element is fabricated in the same manner, albeit a mirror image, of the first antenna element. In one embodiment, the antenna elements are fabricated by cutting a contour of the plurality of dipole elements and the center conductor from a sheet of metal (e.g., aluminum or one of its alloys). The antenna elements and transmission line structures are preferably coupled, such that no electrical discontinuities exist between the antenna elements and a respective transmission line structure. In one embodiment, a conductive epoxy or a brazing process is used to permanently attach flat bottom surfaces of the transmission line structures to a different center conductor of the first and second antenna elements.