| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize, also to make input impedance high and to perform a broadband operation. SOLUTION: The 1st and 2nd spiral elements 10a and 10b are parallelly arranged over a ground plane 12 and a linear conductor 11 is connected between their spiral starting ends. One end of a vertical element 15 whose other end is made a feeding point Sfd is connected at the center point B of the conductor 11. And 1st and 2nd short-circuit conductors 13 and 14 are respectively connected at the junctions P and Q which are specified positions of the elements 10a and 10b respectively and are made short-circuited to the plane 12.
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