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Flexible dielectric waveguides with powder cores

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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Abstract

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.


Item Type:Article
Additional Information:© Copyright 1988 IEEE. Reprinted with permission. Manuscript received June 22, 1987; revised December 18, 1987.
Record Number:CaltechAUTHORS:BRUieeetmtt88
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:BRUieeetmtt88
Alternative URL:http://dx.doi.org/10.1109/22.3608
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3540
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:13 Jun 2006
Last Modified:26 Dec 2012 08:54

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