Sideline RF Power Coupler for Compact Microwave Cavity Drive
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Solution Overview
Problem
Traditional RF power coupler systems are large in size, inefficient, and impractical for driving multiple microwave cavities independently, with issues of losses and reflections during power transfer and mechanical fragility in loop coupling.
Innovation Solution
A sideline RF power coupler with an inner and outer conductor, sharing a central axis, and an insulation layer, allowing for compact, efficient power transmission into a microwave cavity with adjustable electromagnetic field amplitude and direction, reducing the need for mechanical adjustments within the cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional power coupler systems (on-axis coax or end-butt waveguide) are used to drive multiple cavities, then power transmission capability is improved, but device size becomes impractically large
Solution Approach 1:
The invention divides the power transmission system into independent sideline couplers for each cavity, with each coupler being a compact coaxial structure. This segmentation allows each coupler to be small while collectively driving multiple cavities independently, resolving the contradiction between power capability and size.
Solution Approach 2:
The invention transitions from traditional on-axis or end-butt coupling geometries to a sideline coupling approach, positioning the coaxial coupler alongside the cavity rather than along its axis or at its end. This dimensional repositioning enables compact integration while maintaining effective power transmission to multiple cavities.
2Productivity
If traditional power coupler systems are used, then multiple cavities can be driven, but power losses and reflections increase during power transfer
Solution Approach 1:
The invention extracts the problematic transition stages from the power transmission path by using a direct sideline coupling geometry. This eliminates the need for complex waveguide-to-waveguide conversions and multiple transition points, thereby reducing power losses and reflections while maintaining the ability to drive multiple cavities.
Solution Approach 2:
The coaxial coupler structure serves as an effective intermediary between the power source and multiple cavities. Its standardized geometry provides smooth impedance transitions and efficient coupling, minimizing reflections and energy losses during power transfer to each cavity.
3Power
If loop coupling is used to transmit power into cavities, then coupling efficiency is improved, but mechanical strength and reliability decrease
Solution Approach 1:
The invention replaces the fragile loop coupling structure with a robust coaxial coupler design that replicates the effective coupling function. The coaxial geometry provides both the desired coupling efficiency and inherent mechanical strength, eliminating the fragility issue while maintaining performance.
Solution Approach 2:
The coaxial coupler employs a composite structure with an inner conductor, outer conductor, and insulation layer. This composite design provides both efficient electromagnetic coupling and mechanical robustness, resolving the contradiction between coupling efficiency and mechanical strength.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The sideline RF power coupler provides a compact, efficient, and robust solution for transmitting RF power into microwave cavities, enabling independent control of each cavity with reduced losses and reflections, and allowing for modular and redundant particle beam accelerators.
Implementation Method 1
an insulation layer between the inner conductor and the outer conductor
Implementation Method 2
a sideline RF power coupler for transmitting power into a microwave cavity
Data Source
AI summary
Provided is a resonant structure including a microwave cavity and a sideline radio-frequency (RF) power coupler including: an inner conductor; an outer conductor sharing a central axis with the inner conductor, the outer conductor being electrically coupled to an outer wall of the microwave cavity; and an insulation layer between the inner conductor and the outer conductor.