Patent ID: 8543071
Filing Date: 2013-09-24
Classification: H03H,H04B

Abstract:
1. A radiofrequency transmit or receive chain working at a nominal frequency F 0 , comprising: at least one amplifier, an antenna, an impedance matching network disposed between the amplifier and the antenna and comprising adjustable impedances, a measurement impedance of known complex value inserted in series between the amplifier and the matching network, means of measurement of the potentials present at the terminals of the measurement impedance for determining at one and the same time the current in the measurement impedance and a voltage at the output of the amplifier for a transmit chain or a voltage at the input of the amplifier for a receive chain, means of calculation and means of electrical control of the matching network for adjusting the adjustable impedances to these new values, wherein the chain comprises a measurement frequency generator linked to the output of the transmit amplifier or to the input of the transmit amplifier, so as to inject thereinto a measurement frequency F