A multi-beam antenna known as the Maxson antenna is described. It consists of a linear array of elements fed in a serial fashion by a matrix of waveguide directional couplers. The antenna designed produced two 1° beams and operated over a 10% bandwidth at C-band. The feeder coupling matrix was designed to produce no interaction between beams. Limits on orthogonal and non-orthogonal beam-shapes and beam-positions are derived. Applications of this type of antenna are discussed.