Matching circuit

A matching circuit for adapting an amplifier to load impedance at various output power levels of the amplifier, the matching circuit comprising one or more LC circuits, i.e. an electric circuit switching consisting of at least one coil and at least one capacitor for tuning harmonic signals resulting from amplifier non-linearities, wherein

• at least one capacitor of the LC circuit is an adjustable microelectromechanical (MEMS) capacitor,
• the LC circuit comprises an interface for receiving control signals adjusting the capacitance of the microelectromechanical (MEMS) capacitor,
• the control signal adjusts the capacitance of the microelectromechanical (MEMS) capacitor such that the LC circuit resonates at the frequency of the harmonic signal to be tuned.

A method for adapting an amplifier to load impedance with a matching circuit at various output power levels of the amplifier, the matching circuit comprising an interface for receiving control signals which determine capacitance of one or more capacitors, comprising

• adjusting the capacitance of at least one microelectromechanical (MEMS) capacitor of the matching circuit such that the amplifier operates optimally in a broad output power level range.

A method for adapting an amplifier to load impedance with a matching circuit at various output power levels of the amplifier, the matching circuit comprising one or more LC circuits, i.e. an electric circuit switching consisting of at least one coil and at least one capacitor for tuning harmonic signals resulting from amplifier non-linearities, comprising

• tuning harmonic signals by an LC circuit which comprises at least one adjustable microelectromechanical (MEMS) capacitor,
• receiving control signals adjusting capacitance of the microelectromechanical (MEMS) capacitor through an interface in the LC circuit,
• adjusting the capacitance of the microelectromechanical (MEMS) capacitor by at least one control signal such that the LC circuit resonates at the frequency of the harmonic signal to be tuned.