中国物理B ›› 2025, Vol. 34 ›› Issue (6): 67104-067104.doi: 10.1088/1674-1056/add1bf

所属专题: SPECIAL TOPIC — Advanced magnonics

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A two-stage injection locking amplifier based on a cavity magnonic oscillator

Mun Kim, Chunlei Zhang, Chenyang Lu, Jacob Burgess, and Can-Ming Hu†   

  1. Department of Physics and Astronomy, University of Manitoba, Winnipeg, CA, R3T 2M5, Canada
  • 收稿日期:2025-03-27 修回日期:2025-04-27 接受日期:2025-04-29 出版日期:2025-05-16 发布日期:2025-06-06
  • 通讯作者: Can-Ming Hu E-mail:can-ming.hu@umanitoba.ca
  • 基金资助:
    This work has been funded by NSERC Discovery Grants, NSERC Discovery Accelerator Supplements, Innovation Proof-of-Concept Grant of Research Manitoba, and Faculty of Science Research Innovation and Commercialization Grant of University of Manitoba (C.-M.H.).

A two-stage injection locking amplifier based on a cavity magnonic oscillator

Mun Kim, Chunlei Zhang, Chenyang Lu, Jacob Burgess, and Can-Ming Hu†   

  1. Department of Physics and Astronomy, University of Manitoba, Winnipeg, CA, R3T 2M5, Canada
  • Received:2025-03-27 Revised:2025-04-27 Accepted:2025-04-29 Online:2025-05-16 Published:2025-06-06
  • Contact: Can-Ming Hu E-mail:can-ming.hu@umanitoba.ca
  • Supported by:
    This work has been funded by NSERC Discovery Grants, NSERC Discovery Accelerator Supplements, Innovation Proof-of-Concept Grant of Research Manitoba, and Faculty of Science Research Innovation and Commercialization Grant of University of Manitoba (C.-M.H.).

摘要: A cavity magnonic oscillator uses the coupling of a planar transmission line oscillator (cavity) and spin excitations (magnons) in a ferrimagnetic material to achieve superior frequency stability and reduced phase noise. Like many low phase noise oscillators, a cavity magnonic oscillator faces the challenge that its narrow resonance profile is not well suited for injection locking amplification. This work presents an improved design for such an oscillator configured as an injection locking amplifier (ILA) with an extended lock range. The proposed design features a two-stage architecture, consisting of a pre-amplification oscillator and a cavity magnonic oscillator, separated by an isolator to prevent backward locking. By optimizing the circuit parameters of each stage, the proposed design achieved an order of magnitude increase in lock range, when compared to its predecessors, all while preserving the phase noise quality of the input, making it well-suited for narrowband, sensitive signal amplification. Furthermore, this work provides a method for using oscillators with high spectral purity as injection locking amplifiers.

关键词: cavity magnonic oscillator, injection locking amplifier

Abstract: A cavity magnonic oscillator uses the coupling of a planar transmission line oscillator (cavity) and spin excitations (magnons) in a ferrimagnetic material to achieve superior frequency stability and reduced phase noise. Like many low phase noise oscillators, a cavity magnonic oscillator faces the challenge that its narrow resonance profile is not well suited for injection locking amplification. This work presents an improved design for such an oscillator configured as an injection locking amplifier (ILA) with an extended lock range. The proposed design features a two-stage architecture, consisting of a pre-amplification oscillator and a cavity magnonic oscillator, separated by an isolator to prevent backward locking. By optimizing the circuit parameters of each stage, the proposed design achieved an order of magnitude increase in lock range, when compared to its predecessors, all while preserving the phase noise quality of the input, making it well-suited for narrowband, sensitive signal amplification. Furthermore, this work provides a method for using oscillators with high spectral purity as injection locking amplifiers.

Key words: cavity magnonic oscillator, injection locking amplifier

中图分类号:  (Polaritons (including photon-phonon and photon-magnon interactions))

  • 71.36.+c
84.30.Le (Amplifiers) 84.40.Dc (Microwave circuits) 42.82.Fv (Hybrid systems)