Planar Array of a Probe Excited Circular Ring Radiating Bidirectional Pattern

  • Phongcharoenpanich, Chuwong (Faculty of Engineering and Research Center for Communications and Information Technology, King Mongkut′s Institute of Technology Ladkrabang) ;
  • Sroysuwan, Thanarart (Faculty of Engineering and Research Center for Communications and Information Technology, King Mongkut′s Institute of Technology Ladkrabang) ;
  • Wounchoum, Phairote (Faculty of Engineering and Research Center for Communications and Information Technology, King Mongkut′s Institute of Technology Ladkrabang) ;
  • Kosulvit, Sompol (Faculty of Engineering and Research Center for Communications and Information Technology, King Mongkut′s Institute of Technology Ladkrabang) ;
  • Krairiksh, Monai (Faculty of Engineering and Research Center for Communications and Information Technology, King Mongkut′s Institute of Technology Ladkrabang)
  • Published : 2002.07.01

Abstract

This paper reports the characteristics of a bidirectional antenna by using a planar array of a probe excited circular ring. The element of a bidirectional antenna is first designed to achieve the maximum directivity. The directivity can be further increased by arranging these elements to form the linear array. There are two types of linear array to be investigated i.e., on axis and off axis arrangement. On-axis linear array yields better directivity than off-axis linear array. Therefore, this orientation is further used to form the planar array. The radiation characteristics of this optimum planar array are rigorously reported. The proposed structure is very useful to extend the distance between the base station in PCT system.

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