Radial Fed Circuit for Millimeter-Wave Switched Sector-Beam Antenna

This paper describes the simulated design for a fed circuit having a radial structure for use in a newly proposed millimeter-wave switched sector-beam antenna. The goal is to realize an ultra-high-speed gigabit-rate wireless LAN. The radial structure is designed to achieve the purpose that the input power from a unique RF port at the structure´s center that can be sent to any one of selected sectors with maximum power under the required bandwidth. The simulated results of the proposed radial structure show that the bandwidth of S₂₁, with an insertion loss of -1.0 B in the frequency range of 59-66 GHz is 7.0 GHz for the case of four, five, and six sectors, and that the bandwidths are 2.3 GHz and 1.7 GHz for the case of seven and eight sectors, respectively