Patent ID: 8633527

Claim:
A semiconductor device, comprising: a semiconductor element; a splitter connected to an input portion of the semiconductor element; a combiner connected to an output portion of the semiconductor element; an input terminal disposed on a substrate; a first main line connecting the input terminal with the splitter; and a first microstrip line extending in a direction intersecting with the first main line, wherein the splitter is disposed on the substrate and has a first splitter portion including a first transmission line and a second transmission line, a second splitter portion including a third transmission line and a fourth transmission line, and a first resistance and a second resistance respectively connected to both the first transmission line and the third transmission line, the first transmission line is disposed between the second transmission line and the semiconductor element, the third transmission line is disposed between the fourth transmission line and the semiconductor element, the first transmission line and the third transmission line are disposed in parallel with a space therebetween, the first resistance is disposed in the space between the first transmission line and the third transmission line, the second resistance is disposed in the space between the first transmission line and the third transmission line, the first resistance is disposed between the second resistance and the semiconductor element, the semiconductor element is a field effect transistor having a gate terminal as the input portion, the splitter is connected with the gate terminal, the second transmission line and the fourth transmission line are connected with an end of the first main line opposite to an end thereof connected with the input terminal, and both ends of the first microstrip line are each a gate bias terminal.