| 摘要 |
PROBLEM TO BE SOLVED: To improve the performance of calling to a slave device of a cordless telephone set by giving intensified directivity to the slave device to the dipole antenna of a master device. SOLUTION: This directivity imparting device 1A for dipole antenna equipped with a reflector 4 is longer than the dipole antenna built in an antenna element 5 and a support member 2A, which supports the reflector 4 at one end part and a detachable clamp part 21 clamped almost across the feeding point of the dipole antenna at the other end part. Furthermore, a dipole antenna directivity imparting device 1B is composed of a director 3, which is shorter than the dipole antenna 51, the reflector 4, and a support member 2B having a detachable clamp part 21, which supports the director 3 and reflector 4 at both its ends and is clamped almost nearby the feeding point of the dipole antenna 51 almost at the center part.
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