Abstract
The design of a compact X-band MMIC phase shifter in 0.18-µm technology is presented in this article. In this design a different topology for 180 degree phase shift causes the reduction of the series switches and improves NF, gain and size. A conventional embedded switch filter circuit is also used for other stages of phase shifter's circuit. With this structure 32 state phase shift with high accuracy is achieved. Simulation results of the proposed phase shifter at 9.3 GHz demonstrate 1.2 dB rms insertion loss deviation and 1 degree rms phase error. Insertion loss of this phase shifter is in 14–15.5 dB range for the 1.4 GHz frequency band.
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