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Characteristics of dielectric-loaded coaxial cables. Lau, Ming Chee

Abstract

The characteristics of all modes in the dielectric-loaded coaxial cable have been given. Reduction in attenuation by dielectric loading is possible for the dominant mode in these cables, including -cables with optimum-dimensions, if lossless or sufficiently low-loss dielectrics are used. For higher losses in the loading dielectric, higher frequencies are required to achieve attenuation reduction. No significant reduction in conductor losses can be achieved with cables whose dimensions are such that only the dominant mode can be supported. Measurements of the attenuation coefficients of several lower order modes were carried out at S-band frequencies using a resonant cavity. Experimental observations agree favorably with theory for the TM modes.

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