A miniaturized wideband 4/spl times/4 switch matrix IC using four InP-HEMT SP4T switches

A new 4/spl times/4 switch matrix requires about 1/10 the area, a low number of interconnection transmission lines (ITLs) with greatly reduced length, and half the number of overlaps between ITLs compared to a conventional one consisting of 8 SP4T switches and 16 ITLs. InP HEMTs with a low Ron-Coff product enable us to configure a dc-to-over-10-GHz SP4T switch with a series-FET configuration, which requires half the control lines of a series-shunt configuration. The switch matrix IC has an extremely small core size of 409 /spl times/ 368 /spl mu/m/sup 2/ and achieves lower insertion loss with less deviation (<2.17/spl sim/2.28 dB) than a conventional one (<3.07/spl sim/3.62 dB) below 10 GHz.