| 摘要 |
PROBLEM TO BE SOLVED: To configure a linear antenna element and a helical antenna element at a low cost with high precision by means of a method proper to industrial production. SOLUTION: The linear antenna element 1 is configured with an element holder 3 having a large diameter cylinder 3a to mount a helical antenna element 2 and a small diameter cylinder 3b concentric to the cylinder 3a, and integrated with a synthetic-resin-made joint 7 as a separate module as above. A cylindrical small diameter part 7b is formed to a tip of the joint 7 and the small diameter part 7b is inserted to the small diameter cylinder 3b of the element holder 3 to apply locking. Then a male screw 7c is provided to the cylinder 3b for screw fitting and a caulking part 3d is caulked for locking. Or, an adhesive is used in addition to above for press-sticking or thermal caulking is applied.
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