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A novel miniature ultra wide bandwidth 90 monolithic microwave integrated circuit phase shifter with microstrip radial stubs operated from 1 to 22 GHz is presented. The phase shifter exhibits a high performance. Within the whole bandwidth from 1 to 22 GHz, the phase error of the phase shifter is less than 3deg, the return losses of the different phase shift states are more than 14 dB, the insertion...
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