Patent ID: 8416035
Filing Date: 2013-04-09
Classification: H03F,H03H

Abstract:
1. A multiband matching circuit comprising: an input terminal configured to be connected to an alternating-current circuit; a first output terminal configured to be connected to a device having a predetermined impedance; a second output terminal configured to be connected to a device having a predetermined impedance; an inductive element having one end connected to the input terminal; a first switch having one end connected to an other end of the inductive element and an other end grounded; a capacitive element having one end connected to the input terminal; a second switch having one end connected to an other end of the capacitive element and an other end grounded; a first-band matching circuit inserted between the first output terminal and a first connection point of the inductive element and the first switch, the first-band matching circuit matching an impedance at the first connection point to an impedance at the first output terminal in a first frequency band; and a second-band matching circuit inserted between the second output terminal and a second connection point of the capacitive element and the second switch, the second-band matching circuit matching an impedance at the second connection point to an impedance at the second output terminal in a second frequency band higher than the first frequency band.