Adv Antest Corporation

Hirakawa Hewtech Corporation

Mitsuo Nanjyo

Shigeru Matsumura

Shigeru Murayama

Mitsuo Iwasaki

Tetsuo Yamaguchi

Takao Ishido

Takaaki Kusama

A foamed coaxial cable with high precision according to the present invention comprises: an internal conductor twisted with a plurality of electrically conductive wires; a foamed insulator with its low dielectric constant made of a porous tape body formed on the outer periphery of this internal conductor; an external conductor made of a number of electrically conductive thin wires braided on the outer periphery of this foamed insulator; and an outer sheath made of a resin having heat resistance formed on the outer periphery of this external insulator, wherein the precision of external diameter of the internal conductor is 4/1000 mm or less, the precision of external diameter size of the foamed insulator is &#xb1;0.02 mm, the insulator is formed in a completely circular shape, the precision of external diameter size of the external conductor is &#xb1;2%, the external conductor is formed in a completely circular shape, and the precision of characteristic impedance value between the internal conductor and the external conductor having the foamed insulator interposed therebetween is &#xb1;1 &#x3a9;.

High accuracy foamed coaxial cable and method for manufacturing the same

Growing community of inventors

Sowa-machi, Japan

Mitsuo Nanjyo