STRAIGHT LINE ARRAY ANTENNA SYSTEM FOR POSITION DETECTING SYSTEM

PROBLEM TO BE SOLVED: To improve the detecting efficiency of a position detecting efficiency by equalizing the phase directivity of each antenna element. SOLUTION: A straight line array antenna system 10 for position detection system consists of a phase reference antenna element 2a, an antenna element for comparing phases 2b, antenna elements 3a and 3b terminated by a non- reflection terminator, and intervals between the respective elements are set to be the half of the wave length of a using frequency (λ/2). The elements 3a and 3b are arranged outside of the element 2a and the element 2b. By this constitution, the elements 2a and 2b receive nearly equal combination from right and left adjacent antenna elements to equalize the phase directivity of each. Thereby it becomes possible to eliminate the difference of the phase directivity of each antenna elements 2a and 2b which cause the deterioration of the performance of the position detection system.