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      Research Article       
       
      ScienceAsia 25 (1999) : 231-236 |doi: 10.2306/scienceasia1513-1874.1999.25.231 
        
            A Steerable Spherical Slot Array Antenna
            Monai Krairiksh*, Chanchai Thongsopa, Chuwong Phongcharoenpanich, Ekajit Khoomwong and Chaiwat Leekpai
             
            ABSTRACT: This paper investigates the principle of a steerable spherical slot array antenna. By combining the advantages of a spherical array in which the beam shape can be kept constant as it is steered in any direction, a simple beam steering mechanism of an active array antenna and a simple array element, a cost effective steerable antenna can be achieved. This antenna is useful in a mobile communication system. 
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          Department of Civil Engineering, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand. 
             
          * Corresponding author. 
           
          Received 16 February 1999. 
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