This letter describes the implementation and performance of a phase detector and algorithm combination used to tune the relative phases of an 18-GHz RTWO. Symmetrical XOR phase detectors are designed (20 GHz simulated operation), fabricated in a SiGe BiCMOS process and tested to resolve approximately 4 mV/° from 35° to 55° and approximately 5 mV/° from 80° to 100° at 12 GHz. Instances of this phase detector are used to measure the phase of nominal 45° differential transmission line sections of an 18-GHz RTWO. The phase alignment algorithm mitigates differences between these measurements by iteratively adjusting varactors placed differentially across the RTWO transmission line sections.

Additional Metadata
Keywords High speed phase detector, phase alignment algorithm, phase calibration, RTWO, SiGe BiCMOS phase tuning
Persistent URL dx.doi.org/10.1109/LMWC.2016.2585574
Journal IEEE Microwave and Wireless Components Letters
Citation
Smith, R. (Raleigh), Ansari, K. (Kimia), Rogers, J, & Plett, C. (2016). Tuning of the Relative Phases of a Rotary Travelling Wave Oscillator. IEEE Microwave and Wireless Components Letters, 26(8), 610–612. doi:10.1109/LMWC.2016.2585574