| 摘要 |
PCT No. PCT/AU87/00104 Sec. 371 Date Dec. 2, 1987 Sec. 102(e) Date Dec. 2, 1987 PCT Filed Apr. 2, 1987 PCT Pub. No. WO87/06065 PCT Pub. Date Oct. 8, 1987.A transmission delay line including a helical channel (2) formed in the surface of a cylinder (1), with a conductive sleeve (7) fitted to the cylinder to close the channel. A helical conductive member (4) is positioned within the channel (2) and spaced from the walls thereof by a dielectric material (5, 9).
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