Phase-Noise Measurement of Microwave Oscillators Using Phase-Shifterless Delay-Line Discriminator

  title={Phase-Noise Measurement of Microwave Oscillators Using Phase-Shifterless Delay-Line Discriminator},
  author={Hamed Gheidi and Ali Banai},
  journal={IEEE Transactions on Microwave Theory and Techniques},
In this paper, a modified method based on the frequency discriminator technique for measuring phase noise of microwave oscillators is presented. In the proposed method, the phase shifter is omitted. In contrast, a 90° hybrid with one more channel containing a phase detector, and a low-noise amplifier is added to the measurement setup. It can be said that an in-phase/quadrature phase-noise detection has been developed. With the proposed method, tuning of the variable phase shifter is not needed… CONTINUE READING
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