| 摘要 |
An electrical cable (22) has a central conductor structure (28) and a plurality of spiral conductor structures (38) spirally wrapped around the central conductor structure (28). Each of the spiral conductor structures (3 8) includes an electrically conducting spiral conductor (40), and a spiral conductor insulation (44) overlying the spiral conductor (40). Each spiral conductor structure (38) has no electrically conducting shielding thereon. Each spiral conductor structure (38) retains a same pair of circumferentiall y adjacent spiral conductor structures (38) along a length of the electrical cable (22). Each spiral conductor structure (38) has a designated identity, and a circumferential arrangement of each spiral conductor structure (38) is selected responsive to its designated identity and to the designated identities of each of the pair of circumferentially adjacent spiral conducto r structures (38). An electrically conducting outer shield (46) overlies the plurality of spiral conductors (40), and an outer insulation (48) overlies t he electrically conducting outer shield (46). The electrical cable (22) is substantially circular viewed in cross section perpendicular to the local longitudinal axis (24).
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