Flexible dielectric waveguides with powder cores
- Creators
- Bruno, William M.
- Bridges, William B.
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.
Additional Information
© 1988 IEEE. Reprinted with permission. Manuscript received June 22, 1987; revised December 18, 1987.Attached Files
Published - BRUieeetmtt88.pdf
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Additional details
- Eprint ID
- 3540
- Resolver ID
- CaltechAUTHORS:BRUieeetmtt88
- Created
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2006-06-13Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field