DESIGN AND ANALYSIS OF SMALL MULTISECTOR ANTENNA FOR WIRELESS LANS BASED ON MONOPOLE YAGI-UDA ELEMENTS

This paper proposes a new small multisector antenna called MS-MPYA (mu ltisector monopole Yagi-Uda array) for wireless LANs. MS-MPYA consists of a multisector monopole Yagi-Uda array on a circular finite ground plane. The horizontal radiation pattern of the MS-MPYA is largely dete rmined by the multisector array setting effect. A numerical analysis s hows that setting metallic fins between arrays is effective in elimina ting the strong reflection that would otherwise cause pattern instabil ity; when the metallic fins are set, the beamwidth is reduced in the h orizontal plane due to mutual sector interaction. The MS-MPYA design m ethod considers the variables of array length, ground plane length, re flector height, and fin length. We clarify that the MS-MPYA offers a m uch lower profile than corner reflector or horn antennas. (C) 1998 Scr ipta Technica.