| 摘要 |
An active device (16), such as a field effect transistor ("FET") (70), converts microwave signals between a slot transmission line ("slotline") (12) and a coplanar waveguide ("CPW") (14). In slotline-to-CPW conversion using one or more FETs, a gate connection is made to one or both of the slotline conductors (18, 20). A drain connection is made to the center conductor (22) on the CPW. Two FET source terminals are connected respectively to each CPW groun strip (24, 26) and may be coupled to a slotline conductor (20). The active device (32) can be reconnected so as to reverse the input and output, providing for conversion of signals from CPW (34) to slotline (36). Conversion between balanced-signal slotline (82) and CPW (84) further includes passive (94) or active (172) phase shift of one signal path.
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