Abstract: Known tags which are capable of receiving and demodulating signals by way of one and the same antenna and by way of one and the same diode, as well as being capable of modulating and transmitting signals, often have a poor efficiency, particularly if the antenna is implemented in the form of a flat plate. By coupling a high-ohm first terminal of the antenna to the diode, and coupling a low-ohm second terminal to earth by way of an inductive element, there is obtained a tag which has a good efficiency, both regarding the reception and demodulation of signals and regarding the modulation and transmission of signals.

Abstract: A method of making a metal reinforcing strip suitable for use in reinforcing a coating applied onto a pipe comprising providing a strip of welded wire mesh having longitudinal and transverse wires, and passing the strip between a pair of rollers which deform the longitudinal wires to an extent which increases progressively across the strip.