Bruno, William M. and Bridges, William B. (1988) Flexible dielectric waveguides with powder cores. IEEE Transactions on Microwave Theory and Techniques, 36 (5). pp. 882-890. ISSN 0018-9480. http://resolver.caltech.edu/CaltechAUTHORS:BRUieeetmtt88
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Flexible dielectric waveguides have been demonstrated at 10 GHz and 94 GHz using thin-wall polymer tubing filled with low-loss, high-dielectric-constant powders. Absorptive losses of the order of 10 dB/m were measured at 94 GHz. with nickel-aluminium titanate and barium tetratitanate powder in polytetrafluoroethylene (PTFE) lightweight electrical tubing. Bending losses at 94 GHz were negligible for curvature radii greater than 4 cm. M.H. Kuhn's (1974) theory of three-region cylindrical dielectric waveguide was used to calculate dispersion curves for the lower-order modes for several combinations of dimensions and dielectric constants. Good agreement was obtained between experimental and theoretical values of guide wavelength. A scheme is proposed for classifying hybrid modes of three-region guides based on the ratio |Ez/Hz|. For two-region guides, this reduces to E. Snitzer's (1961) familiar scheme.
|Additional Information:||© Copyright 1988 IEEE. Reprinted with permission. Manuscript received June 22, 1987; revised December 18, 1987.|
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|Deposited On:||13 Jun 2006|
|Last Modified:||26 Dec 2012 08:54|
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