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

Abstract Radio telescopes are among the applications with highest demands on a local oscillator (LO), which is used to receive and process signals coming from sky. Therefore modules providing required LO signal have traditionally been big complicated. To overcome this disadvantage, we implement our own integrated frequency synthesizer inside small module in article. With able achieve jitter of only 50 fs 10 Hz 2.5 GHz offset at carrier 75 GHz. This part achieved by very low in-band phase noise −111.8 dBc kHz offset. The stabilizable range 62–88 Thus achieving promising results fulfill demanding task synthesizers future.