| 摘要 |
PROBLEM TO BE SOLVED: To give a radiation directivity of elevation angle direction to a coil antenna, without compromising the low profile and flatness.SOLUTION: A coil antenna includes a planar core substrate 10 having a first principal surface 10a and a second principal surface 10b facing each other, and side faces 10c, 10d contiguous to the first principal surface 10a and second principal surface 10b, and an antenna conductor 20 formed by winding conductors 21, 22, 23, 24, in coil-shape, along the first principal surface 10a, the second principal surface 10b, and the side faces 10c, 10d. A plurality of conductors 21 formed along the first principal surface 10a, have bulges in the same direction as a line connecting both ends of the conductor 21. |
