A radio set comprises an antenna which is a 2 monopole antenna capacitively coupled to the radio circuit on a circuit substrate by way of a capacitor and powered by the circuit. The wireless communication method is used in a mobile communication system having a base station apparatus, a relay station apparatus and a mobile station apparatus #1. First and second treater heads have first and second leading edges, first and second trailing edges and are mounted parallel to the longitudinal axis. The readout signal represents a temporal map of the interaction absorption spectrum, and includes frequency components that relate to a processing result of processing the first set of signals. Said cylindrical housing comprises a heatable chamber, on one or both sides, comprising U-shaped connection pipes which are arranged therein and are guided through a separating wall between the chamber and the housing, with the two open ends thereof, and respectively connect two adjacent open tubular membrane sections, forming a membrane loop. It also relates to a process for preparing a material having a low chromium content.