Underground use of a coaxial cable with leaky sections
(1980) IEEE Transactions on Antennas and Propagation — Vol. AP-28, n° 6, p. 875-883 (1980)
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- Abstract
- The optimum efficiency of a leaky cable as a support for radio communications in tunnels involves a compromise between high leakage fields and a low increase of the coaxial mode attenuation. The latter is an important disadvantage of continuous leaky feeders. To obviate this, short leaky sections can be inserted in an otherwise well-shielded coaxial cable. These sections act as mode converters or radiators. A theoretical analysis based on coupled line theory enables us to determine the optimum characteristics of the leaky sections. Numerous experiments were carried out in a tunnel at various frequencies, using different lengths and characteristics of the leaky sections.
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Citations
Delogne, P. P., & Deryck, L. (1980). Underground use of a coaxial cable with leaky sections. IEEE Transactions on Antennas and Propagation, AP-28(6), 875-883. https://hdl.handle.net/2078.5/44876 (Original work published 1980)