| Abstract: | The design and performance of a wide band active GaAs IC 180° differential phase shifter are presented. A two-stage GaAs IC was developed containing a microwave differential amplifier and a matched common-gate input. The active phase shifter achieved a 10° phase unbalance and an isolation at the output ports of better than 10 dB in the 1-10-GHz band. A large percentage of the GaAs chip contains active devices thereby providing a very large operating bandwidth and a reduced surface area. This active phase shifter presents an interesting alternative to the passive rat-race or an equivalent coupler for radio mobile communications. © 1996 John Wiley & Sons, Inc. |
