TEM Waves Guided between Many Conductors

Abstract

Guided TEM waves have been extensively investigated between 2 conductors. The multiconductor case, in spite of some important publications in this direction, did not get into the mainstream of the electromagnetic education, and therefore deserves some more attention. The simple case of lossless multiconductor TEM waves in homogeneous media is a good approximation for many practical cases and is easily derivable by usage of potentials only. In this work we derive the formalism for lossless multiconductor TEM waves in homogeneous media, and show several examples for the usage of this formalism.

Avoiding crosstalk in multiconductor TEM waveguides

“…This has been calculated in [2] but for convenience we shall present it here So the feeding voltage is expressed as V feed = V k − V k+1 . Using eq.…”

“…The characteristic impedance matrix for this cable, having N conductors has been developed in [2] and its components are…”

“…The multiconductor TEM formalism has been developed in [1,2] and is in many senses a generalization of the 2 conductors case, but also emphasizes new properties. One may derive a characteristic impedance matrix representing the connection between the forward propagating voltages and currents.…”

“…For convenience we present in section 2 a summary of the multiconductor TEM formalism developed in [2]. In section 3 we define the crosstalk and calculate it for different feeding possibilities of a flat cable.…”

“…The purpose of this work is to use a full multiconductor TEM formalism [1,2] for analyzing the crosstalk in multiconductor signal carriers (like flat cables), and to develop a method to overcome this crosstalk. As we shall see, the crosstalk is a serious obstacle in transferring information, hence avoiding it can potentially improve one's communication channel.…”