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|1. (WO2010113779) SEMICONDUCTOR DEVICE|
The both ends of each of the gate fingers are connected to the same gate bus bar. The both ends of each of a plurality of source electrodes are grounded. The source electrodes and a plurality of drain electrodes are alternately disposed one by one, and another gate fingers are disposed between the source electrodes and the drain electrodes. The drain electrodes are connected by means of an air bridge provided over the source electrode and the two gate fingers sandwiched between the drain electrodes. A ladder circuit is connected to the gate bus bar in parallel to the gate fingers, and loop oscillation conditions are adjusted.