Patent ID: 6320476
Filing Date: 2001-11-20
Classification: H01P

Abstract:
A millimeter-band semiconductor switching circuit having:a field effect transistor (FET) as a switching element;a millimeter-band transmission line lying along a connection direction and having two parts; anda ground having two ground connections, the FET being disposed between the two parts of the millimeter-band transmission line and the two ground connections and comprising:a generally comb-shaped gate electrode having a plurality of gate electrode prongs and connected to a current supply path;a plurality of first electrodes and second electrodes arrayed in alternating sequence with the plurality of gate electrode prongs, a gate electrode prong being disposed between each pair of first and second electrodes, and, each first electrode being disposed between a respective pair of the gate electrode prongs, at an interval;a first electrode interconnect interconnecting the plurality of first electrodes at each of two opposite lengthwise ends of the first electrodes to the two ground connections at opposite sides of the FET transverse to the connection direction; anda second electrode interconnect including an air bridge interconnecting the plurality of second electrodes, wherein the two parts of the millimeter-band transmission line are respectively connected to the second electrode interconnect at opposite sides of the FET in the connection direction.