| 摘要 |
The present invention achieves a lower capacitance of 60pF/m or less and attains sufficiently exceptional mechanical strength. A hollow core body (101) is provided with an inner conductor (1), a first insulation covered body (2), and a second insulation covered body (3). The first insulation covered body (2) has a first inner ring portion (2a), and first gaps (G1) surrounded by first rib portions (2b) and a first outer ring portion (2c). The second insulation covered body (3) has a second inner ring portion (3a), and second gaps (G2) surrounded by second rib portions (3b) and a second outer ring portion (3c). The minimum thickness of the second inner ring portion (3a), the second rib portions (3b), and the second outer ring portion (3c) is greater than the maximum thickness of the first inner ring portion (2a), the first rib portions (2b), and the first outer ring portion (2c). By this configuration, the present invention can handle high-speed and high-capacity signal transmission and remain unsusceptible to deterioration in characteristics even when many cores are twisted together or bent. |
