Microwave Pulse Switching with Circulator Isolation for Reflective Loads
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Solution Overview
Problem
High power microwave pulse systems, particularly those using magnetrons, face instability issues when delivering power to reflective or resonant loads, leading to performance degradation due to reflected power causing instabilities in magnetrons.
Innovation Solution
A microwave pulse power switching system comprising a pulse power switcher and a waveguide circulator, which diverts and isolates microwave power, allowing control of pulse power delivery to loads while preventing reflected power from reaching the magnetron, thereby maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pulse power switching is implemented to control microwave power delivery to reflective or resonant loads, then power delivery control is improved, but magnetron stability deteriorates due to reflected power causing instabilities
Solution Approach 1:
A circulator is introduced as an intermediary component between the magnetron and the pulse power switcher. The circulator directs reflected power from the load away from the magnetron, preventing it from causing instabilities while allowing the pulse power switcher to maintain control over power delivery to reflective or resonant loads.
2Ease of operation
If voltage pulses applied to the magnetron are varied to achieve different power levels, then power level control is improved, but frequency stability deteriorates due to frequency drift
Solution Approach 1:
The power control function is segmented from the magnetron operation. The magnetron operates at constant voltage and frequency, while a separate pulse power switcher downstream controls the actual power delivery to the load. This segmentation allows independent optimization of frequency stability (at the magnetron) and power level control (at the switcher).
3Adaptability or versatility
If pulse power switching is used with resonant loads, then power delivery flexibility is improved, but magnetron stability deteriorates due to destabilization at pulse edges during energy filling and dumping
Solution Approach 1:
The circulator acts as a mediator that isolates the magnetron from the energy filling and dumping transients occurring at the resonant load. By directing reflected energy away from the magnetron, the circulator prevents the destabilizing effects of pulse edge transients while allowing the system to maintain flexible power delivery capability.
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
Enables effective pulse power switching for both reflective and resonant loads, expanding the applications of pulse power delivery systems by stabilizing the magnetron and preventing frequency drift, and allowing for adjustable power delivery to meet varying application requirements.
Implementation Method 1
The invention is comprised of two essential components, a pulse power switcher and a microwave circulator or isolator
Implementation Method 2
high power microwave pulses are used in a range of industrial applications... Such energy pulses are typically produced by self-excited oscillators such as magnetrons
Implementation Method 3
a pulse power switcher and a microwave circulator or isolator... The pulse power switcher is configured such that all or a portion of the power of individual pulses
Data Source
AI summary
A microwave pulse power switching system comprised of a pulse power switcher and a microwave circulator is interposable between a pulse power source and a pulse power receiver such as an accelerator. The pulse power switcher and microwave circulator are configured to allow switching of the pulse power delivered to the pulse power receiver while isolating the pulse power receiver from the pulse power source.