3D Waveguide Phase-Directed Power Combiners
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Solution Overview
Problem
High power RF applications require efficient methods to distribute pulsed RF power to multiple loads without the need for multiple sources and transmission lines, and existing technologies face challenges in compactly and efficiently routing power between multiple outputs using phase-directed combining methods.
Innovation Solution
The development of compact, multi-port phase-directed power combiners using passive waveguide networks that allow RF power from multiple sources to be combined and directed to any of an equal number of output ports through relative phase control, utilizing geometric arrangements and unique waveguide components like superhybrids and magic-H hybrids to achieve efficient power switching without active components or dielectrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional planar waveguide layouts are used for multi-port power combiners, then routing power between multiple outputs is achieved, but device complexity and layout extent increase significantly
Solution Approach 1:
The patent transitions from traditional two-dimensional planar waveguide layouts to three-dimensional configurations by stacking multiple waveguide layers vertically. This dimensional change allows power combiners to route signals between multiple ports without requiring extensive lateral bends and waveguide runs, thereby reducing layout complexity while maintaining full adaptability for power distribution to multiple loads
2Adaptability or versatility
If multiple separate sources and transmission lines are used for each load, then power delivery to multiple loads is achieved, but peak power requirement increases by factor of n
Solution Approach 1:
The patent implements phase-directed combining networks that merge outputs from n power sources into a single combined output that can be selectively directed to any one of n different loads. By controlling the relative phases of the n input signals, the system achieves constructive interference at the desired output port, allowing a single combined power stream to serve multiple loads sequentially rather than requiring n separate power sources operating simultaneously
3Power
If phase-directed combining is implemented, then peak power requirement is reduced by factor of n, but device complexity increases
Solution Approach 1:
The patent reduces combining circuit complexity by utilizing three-dimensional waveguide stacking to create more direct signal paths between input and output ports. This vertical arrangement eliminates the need for numerous lateral bends and extensive waveguide runs required in planar configurations, thereby simplifying the overall device structure while maintaining the peak power reduction benefits of phase-directed combining
Solution Approach 2:
The patent employs modular waveguide component designs that can be stacked and interconnected in systematic arrays. This segmentation allows complex multi-port combining networks to be constructed from standardized building blocks, reducing design complexity and facilitating easier fabrication and assembly compared to monolithic designs
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
These compact waveguide circuits enable efficient and agile switching of RF power between output ports, reducing peak power requirements and allowing for quick power direction to any output, with applications in medical radiation therapy and other high-power RF applications, while avoiding the complexity of traditional layouts.
Implementation Method 1
RF power from multiple sources can be combined and directed to any selected one of a desired number of different loads by controlling the relative phase of the input RF power
Data Source
AI summary
High power RF phase-directed power combiners include magic H hybrid and/or superhybrid circuits oriented in orthogonal H-planes and connected using E-plane bends and/or twists to produce compact 3D waveguide circuits, including 8×8 and 16×16 combiners. Using phase control at the input ports, RF power can be directed to a single output port, enabling fast switching between output ports for applications such as multi-angle radiation therapy.