Multi-Cathode Magnetron with Internal Field Coupling
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Solution Overview
Problem
Existing magnetron designs require complex and costly external injection phase locking systems to achieve high-efficiency microwave power combining, which compromises their simplicity, cost-effectiveness, and volume efficiency.
Innovation Solution
The magnetron design incorporates a tube body with multiple cavities, anodes, and cathodes, allowing for internal electromagnetic field coupling that locks the output frequency without an external phase-locking system, enhancing energy storage and output power while reducing equipment costs and volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external injection phase locking system is added to achieve high-efficiency microwave power combining, then frequency and phase locking is achieved, but device complexity and cost increase
Solution Approach 1:
The patent merges the phase locking function from an external system into the magnetron's internal structure by creating coupling between multiple cavities. The electromagnetic fields in adjacent cavities are coupled through shared boundaries, enabling intrinsic frequency and phase locking without external injection systems.
Solution Approach 2:
The magnetron achieves frequency locking through self-service by utilizing its own internal cavities and electromagnetic fields. The coupled cavities create a self-sustaining phase locking mechanism where the magnetron's own structure provides the locking function, eliminating the need for external control systems.
2Reliability
If an external injection phase locking system is added to achieve high-efficiency microwave power combining, then frequency and phase locking is achieved, but equipment cost increases
Solution Approach 1:
The patent combines the frequency locking function with the magnetron's existing cavity structure. By designing adjacent cavities to be coupled, the system achieves frequency locking using only the magnetron's own components, eliminating the need for expensive external injection systems and reducing overall equipment cost.
3Reliability
If an external injection phase locking system is added to achieve high-efficiency microwave power combining, then frequency and phase locking is achieved, but equipment volume increases
Solution Approach 1:
The patent merges the phase locking functionality into the compact cavity structure of the magnetron itself. The coupled cavities are integrated within the existing magnetron volume, eliminating the need for separate external injection systems and maintaining compact equipment size.
4Power
If multiple cathodes and anodes are added to increase internal energy storage, then output power is improved, but device complexity increases
Solution Approach 1:
The patent divides the magnetron into multiple discrete cavities, each containing cathodes and anodes. This segmentation allows for increased internal energy storage and higher output power while maintaining a modular structure that is manageable and manufacturable, balancing complexity with performance.
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
This design improves output power and frequency locking within the magnetron, eliminating the need for a complex external phase-locking system, thereby reducing equipment costs and volume while maintaining the magnetron's advantages of simplicity and low weight.
Implementation Method 1
The electromagnetic fields in the plurality of first cavities are coupled inside the magnetron
Implementation Method 2
resonant cavities being formed between the adjacent vanes, the resonant cavities including a first resonant cavity and a second resonant cavity
Implementation Method 3
Magnetron has advantages of simple structure, small volume, light weight, low cost and the like, and is widely applied to fields of national defense, industry, agriculture, medical treatment and the like as a high-power microwave source
Data Source
AI summary
A magnetron is provided and includes a tube body with a plurality of communicated first cavities therein, a plurality of anodes in the first cavities including a cylinder and a plurality of vanes, outer ends of the vanes are connected with an inner circumferential surface of the cylinder; a first resonant cavity and a second resonant cavity are formed between the adjacent vanes, the cylinder is provided with a plurality of coupling slots arranged at intervals and running through the cylinder to communicate the first resonant cavity with the first cavity; a plurality of cathode arranged in and coaxially with the cylinder; the cathodes and inner ends of the vanes are spaced apart; at least part of the cathodes are located inside vanes, and an output slot is defined on the tube body for communicating the first cavity with an outside.