A monolithic microwave circuit includes a substrate (110), a first pad (112), a first line (137), a second line (138), a first active element (121), a second active element (122), a second pad (113). The first line (137) includes an input end and an output. The second line (138) includes an input end. The first active element (121) includes a first gate electrode connected to the output end of the first line (137). The second active element (122) includes a second gate electrode connected to the output end of the second line (138). The second pad (113) is arranged between the first pad (112) and a region including the first and second active elements (121, 122). The second pad (113) is spaced from the first pad (112) and connected to the ground (101). Electrical length from the input end of the first line (137) to the output end of the first line (137) is equal to electrical length from the input end of the second line (138) to the output end of the second line (138).
