| 摘要 |
An RF phase shifter circuit includes first and second RF ports (104, 106), a nd a switch circuit comprising a plurality of micro-electro-mechanical ("MEM") switches (50A-50D) responsive to control signals. The switch circuit is arranged to select one of a plurality of discrete phase shift values introduced by the phase shifter circuit to RF signals passed between the fir st and second RF ports. The circuits can be connected to provide a single-pole- multiple-throw (SPMT) or multiple-pole-multiple-throw (MPMT) switch function . The SPMT and MPMT switch circuits can be employed in other applications, including switchable attenuators, switchable filter banks, switchable time delay lines, switch matrices and transmit/receive RF switches.
|
