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

Published online by Cambridge University Press:  30 July 2020

Vipin Kumar Open the ORCID record for Vipin Kumar [Opens in a new window] ,
R. Sivakumar ,
C. S. Jayasheela ,
Mahadev Sarkar  and
Shailendra Singh
Vipin Kumar*
Affiliation:
Product Development and Innovation Center, Bharat Electronics Limited, Bangalore560013, India
R. Sivakumar
Affiliation:
Product Development and Innovation Center, Bharat Electronics Limited, Bangalore560013, India
C. S. Jayasheela
Affiliation:
Product Development and Innovation Center, Bharat Electronics Limited, Bangalore560013, India
Mahadev Sarkar
Affiliation:
Product Development and Innovation Center, Bharat Electronics Limited, Bangalore560013, India
Shailendra Singh
Affiliation:
Product Development and Innovation Center, Bharat Electronics Limited, Bangalore560013, India
*
Author for correspondence: Vipin Kumar, E-mail: [email protected]
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Abstract

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.

Keywords

g-sensitivityoven compensated crystal oscillatorphase locked loopphase noisepower spectral densityrandom vibrationreference sourcetemperature compensated crystal oscillatorunit under testvibration isolatorvoltage controlled oscillator
Type
Radar
Information
International Journal of Microwave and Wireless Technologies , Volume 13 , Issue 4 , May 2021 , pp. 335 - 343
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Copyright
Copyright © Cambridge University Press and the European Microwave Association 2020

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