A Room-Temperature 20 GHz Sapphire-Loaded Cavity Oscillator Exploiting Pound–Galani Stabilization for Maximized Phase Noise Performance | Zendy

Lion Kensbock | Zendy; Lukas Polzin | Zendy; Robin Kaesbach | Zendy; Thomas Musch | Zendy; Marcel van Delden | Zendy

Open Access

A Room-Temperature 20 GHz Sapphire-Loaded Cavity Oscillator Exploiting Pound–Galani Stabilization for Maximized Phase Noise Performance

Author(s) -

Lion Kensbock,

Lukas Polzin,

Robin Kaesbach,

Thomas Musch,

Marcel van Delden

Publication year - 2025

Publication title -

ieee transactions on microwave theory and techniques

Language(s) - English

Resource type - Magazines

SCImago Journal Rank - 1.372

H-Index - 190

eISSN - 1557-9670

pISSN - 0018-9480

DOI - 10.1109/tmtt.2025.3611693

Subject(s) - fields, waves and electromagnetics

High-stability reference oscillators are essential for precision microwave applications, including radar systems and radio astronomy. This article presents an expanded analysis of a 20 GHz sapphire-loaded cavity oscillator (SLCO) with Pound–Galani stabilization. The enhanced research study delves into the whispering gallery mode (WGM) resonator characteristics. Experimental results validate the oscillator’s near-carrier stability, showing a phase noise of −96.5 dBcHz −1 at 1 kHz offset frequency with a loaded quality factor exceeding 85 000. This work provides deeper insights into the design trade-offs and performance enhancements necessary for ultralow-phase-noise oscillators, making SLCOs viable for next-generation precision microwave systems at room temperature.

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