Characteristics of Multiconductor, Asymmetric Slow-Wave Microstrip Transmission Lines

摘要

Spectral-domain technique has been applied to analyze multiconductor, asymmetric, slow-wave microstrip lines. It is observed that 1) the coupled slow-wave microstrip line on a two-layer substrate may have sustantially different propagation constants for even and odd modes and 2) the slow-wave factor of an odd mode of microstrip lines on a three-layer substrate may be equal to or larger than that of an even mode under appropriate conditions. This presents the flexibility to realize a large variety of passive components, such as directional couplers, phase shifters, and attenuators. Keywords include: Multiconductor Lines, Slow-Wave Microstrip, Galerkins's Method, and Spectral Domain Method. (Reprints)