A multiband stabilization circuit (100, 100', 200, 300, 400, 500, 600) for an amplification element which is connected to at least either one of an input terminal and an output terminal of the amplification element, comprising: one or several serial stabilization blocks (110, 110', 120, 210, 210', 311, 312, 410, 410', 511, 512, 610) connected in series to the amplification element, with respect to a signal to be amplified by the amplification element in at least two different frequency bands; a plurality of parallel stabilization blocks (130, 130', 140, 140', 220, 230, 240, 250, 320 1 -320 N, 420 1 -420 2N, 520 1 -520 N, 630, 640) connected in parallel to a series connection of the amplification element and the one or several serial stabilization blocks (110, 110', 120, 210, 210', 311, 312, 410, 410', 511, 512, 610), with respect to said signal to be amplified; and one or several switch parts (150, 260, 270, 330 1 -330 N-1, 430 1 -430 2N-2, 530, 650) capable of connecting and disconnecting at least one of said plurality of parallel stabilization blocks (130, 130', 140, 140', 220, 230, 240, 250, 320 1 -320 N, 420 1 -420 2N, 520 1 -520 N, 630, 640) by being rendered in an ON or OFF state depending on each of said at least two different frequency bands, with respect to said signal to be amplified, wherein said one or several serial stabilization blocks (110, 110', 120, 210, 210', 311, 312, 410, 410', 511, 512, 610) and said plurality of parallel stabilization blocks (130, 130', 140, 140', 220, 230, 240, 250, 320 1 -320 N, 420 1 -420 2N, 520 1 -520 N, 630, 640) connected to the series connection via said one or several switch parts (150, 260, 270, 330 1 -330 N-1, 430 1 -430 2N-2, 530, 650) in the ON state ensure a stability of the amplification element at each of said at least two different frequency bands. one or several serial stabilization blocks (110, 110', 120, 210, 210', 311, 312, 410, 410', 511, 512, 610) connected in series to the amplification element, with respect to a signal to be amplified by the amplification element in at least two different frequency bands; a plurality of parallel stabilization blocks (130, 130', 140, 140', 220, 230, 240, 250, 320 1 -320 N, 420 1 -420 2N, 520 1 -520 N, 630, 640) connected in parallel to a series connection of the amplification element and the one or several serial stabilization blocks (110, 110', 120, 210, 210', 311, 312, 410, 410', 511, 512, 610), with respect to said signal to be amplified; and one or several switch parts (150, 260, 270, 330 1 -330 N-1, 430 1 -430 2N-2, 530, 650) capable of connecting and disconnecting at least one of said plurality of parallel stabilization blocks (130, 130', 140, 140', 220, 230, 240, 250, 320 1 -320 N, 420 1 -420 2N, 520 1 -520 N, 630, 640) by being rendered in an ON or OFF state depending on each of said at least two different frequency bands, with respect to said signal to be amplified, wherein said one or several serial stabilization blocks (110, 110', 120, 210, 210', 311, 312, 410, 410', 511, 512, 610) and said plurality of parallel stabilization blocks (130, 130', 140, 140', 220, 230, 240, 250, 320 1 -320 N, 420 1 -420 2N, 520 1 -520 N, 630, 640) connected to the series connection via said one or several switch parts (150, 260, 270, 330 1 -330 N-1, 430 1 -430 2N-2, 530, 650) in the ON state ensure a stability of the amplification element at each of said at least two different frequency bands.