Discussion of RF aspects of the proposed project " Remote sensing systems for tunnel-boring machines "

In a collaboration with the ETH Zurich, EEK department, limits and possibilities of RF remote sensing techniques have been investigated for geological applications. The frequency range of interest here was between 1 MHz and 1 GHz. The use of a vector-networkanalzyer both in reflection- and transmission mode for this type of application is discussed. The present paper is a translation of a report written in German for the ETHZ-EEK in 1989.