Dai-Ichi Seiko Co., Ltd.

Hiroyuki Kon

Yoichi Hashimoto

Good signal transmission characteristics can be stably obtained by a simple structure. A pressure-contact surface of a cover inner surface of a shell cover part, which is openably/closably coupled to a cylindrical opening of an external conductor shell, and an insulative pressing plateis provided with a void part, which separates at least one of them from the other one. By virtue of this, it is configured that the characteristic impedance about the cable-shaped signal transmission medium SC can be adjusted by the void part, and the matching degree (VSWR) of the characteristic impedance with respect to transmission signals can be easily and appropriately matched.

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Fukuoka, Japan

Hiroyuki Kon