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1 results

  • Phase noise performance stabilization of PLL system under dynamic vibration condition for airborne applications

  • Vipin Kumar, R. Sivakumar, C. S. Jayasheela, Mahadev Sarkar, Shailendra Singh
  • Journal:
    International Journal of Microwave and Wireless Technologies / Volume 13 / Issue 4 / May 2021
    Published online by Cambridge University Press:
    30 July 2020, pp. 335-343

  • The purpose of this paper is to disclose improved crystal based frequency source system covering design techniques and experimental methodologies for the stabilization of phase noise performance of X-band phase-locked loop (PLL) at 10.6 GHz. Phase noise performance of PLL-based unit under test (UUT) is prone to disturbance occurred in random vibration profile frequency spectrum. UUT self-resonance plays vital role in occurrence of disturbance in random vibration profile. The stabilization of phase noise performance during dynamic (random) vibration condition is achieved by following methodologies, i.e. vibration-isolator compensation techniques, purification tactic for reference crystal of PLL, and spatial location analysis for finding out mounting position of reference crystal. Spatial analysis helps to filter out UUT self-resonance frequency from random vibration spectrum which leads to reduction of frequency resonance pickups during random vibration testing.