Patent ID: 9628135
Date: 2017-04-18
CPC Classifications: H04B

Claim:
1. A method for automatically adjusting a single-input-port and single-output-port tunable matching circuit, the single-input-port and single-output-port tunable matching circuit being a part of an automatic tuning system having a user port and a target port, the automatic tuning system allowing, at a given frequency, a transfer of power from the user port to the target port, the single-input-port and single-output-port tunable matching circuit comprising one or more adjustable impedance devices, the one or more adjustable impedance devices being referred to as the adjustable impedance devices of the tunable matching circuit and being such that, at said given frequency, each of the adjustable impedance devices of the tunable matching circuit has a reactance, the reactance of any one of the adjustable impedance devices of the tunable matching circuit being adjustable by electrical means, the method comprising the steps of: applying an excitation to the user port; sensing electrical variables at the target port, to obtain two or more sensing unit output signals, each of the sensing unit output signals being mainly determined by one or more of the electrical variables sensed at the target port; measuring, at one or more locations in the single-input-port and single-output-port tunable matching circuit, a temperature, to obtain one or more temperature signals, each of the one or more temperature signals being mainly determined by one or more of the temperatures at said one or more locations; estimating two or more real quantities depending on an impedance seen by the target port, using the sensing unit output signals obtained while the excitation is applied, said two or more real quantities depending on an impedance seen by the target port being sufficient for being able to compute a real part and an imaginary part of the impedance seen by the target port; using said one or more temperature signals and said two or more real quantities depending on an impedance seen by the target port, to obtain one or more tuning control signals; and applying each of the one or more tuning control signals to one or more of the adjustable impedance devices of the tunable matching circuit, the reactance of each of the adjustable impedance devices of the tunable matching circuit being mainly determined by at least one of the one or more tuning control signals.