Design of cavity power combiner with rotatable online decoupling system

Jiang Guodong; Shi Longbo; Sun Liepeng; Jin Kean; Wu Zhengrong; Pan Chao; Huang Guirong; He Yuan

doi:10.11884/HPLPB202537.240257

Volume 37 Issue 6

May 2025

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Jiang Guodong, Shi Longbo, Sun Liepeng, et al. Design of cavity power combiner with rotatable online decoupling system[J]. High Power Laser and Particle Beams, 2025, 37: 064002. doi: 10.11884/HPLPB202537.240257

Citation:

Jiang Guodong, Shi Longbo, Sun Liepeng, et al. Design of cavity power combiner with rotatable online decoupling system[J]. High Power Laser and Particle Beams, 2025, 37: 064002. doi: 10.11884/HPLPB202537.240257

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Design of cavity power combiner with rotatable online decoupling system

doi: 10.11884/HPLPB202537.240257

Jiang Guodong^{1, 2, 3
,},
Shi Longbo^{1, 3},
Sun Liepeng^{1, 3
,
,},
Jin Kean¹,
Wu Zhengrong^{1, 3},
Pan Chao¹,
Huang Guirong^{1, 3},
He Yuan^{1, 3}

1.
Linear Accelerator Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2.
School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
3.
School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2024-08-12
Accepted Date: 2025-03-28
Rev Recd Date: 2025-03-28

Available Online: 2025-04-27

Publish Date: 2025-06-15

Abstract

Abstract

To facilitate online replacement and maintenance of solid-state power sources in particle accelerators, a cavity power combiner with online decoupling capability is required. While cavity combiners offer high power capacity, adjustable input coupling has not been achieved online. Therefore, we designed a 650 MHz eight-in-one cavity power combiner with a rotatable decoupling system. By integrating non-contact open-circuit slits at the RF input port and separating the coupling loop from the cavity, we enabled online rotation adjustment of the magnetic coupling loop. This adjustment allows real-time tuning of input coupling according to the operational status of solid-state power sources, facilitating hot-swapping and efficiency optimization. Simulation results demonstrate high synthesis efficiency and minimal power loss, with excellent amplitude consistency between input and output ports (deviations within 0.25 dB). The ability to adjust coupling online enhances RF isolation at input ports, enabling seamless hot-swappable replacement of power amplifier modules and significantly improving maintainability and flexibility.
- solid-state power source,
- cavity power combiner,
- hot-swappable,
- rotatable decoupling,
- power capacity

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References(15)

References

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