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  4. A phase-locked loop with a jitter of 50 fs for astronomy applications
 
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2023
Journal Article
Title

A phase-locked loop with a jitter of 50 fs for astronomy applications

Abstract
Radio telescopes are among the applications with the highest demands on a local oscillator (LO), which is used to receive and process the signals coming from the sky. Therefore the modules providing the required LO signal have traditionally been big and complicated. To overcome this disadvantage, we implement our own integrated frequency synthesizer inside a small LO module in this article. With this synthesizer we are able to achieve a jitter of only 50 fs integrated from 10 Hz to 2.5 GHz offset at a carrier frequency of 75 GHz. This is in part achieved by a very low in-band phase noise of -111.8 dBc at 10 kHz offset. The stabilizable frequency range is 62-88 GHz. Thus achieving promising results to fulfill this very demanding task with integrated frequency synthesizers in the future.
Author(s)
Braun, Tobias T.
Van Delden, Marcel
Bredendiek, Christian  
Fraunhofer-Institut für Hochfrequenzphysik und Radartechnik FHR  
Schoepfel, Jan
Hauptmeier, Stephan
Shillue, William
Musch, Thomas
Pohl, Nils  
Fraunhofer-Institut für Hochfrequenzphysik und Radartechnik FHR  
Journal
International journal of microwave and wireless technologies  
Open Access
DOI
10.1017/S1759078722001386
Additional full text version
Landing Page
Language
English
Fraunhofer-Institut für Hochfrequenzphysik und Radartechnik FHR  
Keyword(s)
  • aerospace

  • E-Band

  • frequency synthesizer

  • local oscillator

  • phase-locked loop

  • SiGe

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