| 摘要 |
<p>The chain has a measurement frequency generator (GENFm) i.e. oscillator, linked to output of a transmission chain's power amplifier (PA) or to input of the amplifier, so as to inject measurement frequency (Fm) that is different from working frequency, in the chain. A calculation processor (DSP) permits calculations of impedance of an impedance matching network (MN) on the basis of amplifier's voltages (Vd1, Vd2) and currents measured at the measurement frequency, and applies correction so as to bring the calculated impedances to impedance values for the working frequency. An independent claim is also included for a method for automatically matching impedance of a radiofrequency transmission or reception chain working at nominal frequency.</p> |
