Rotating Waveguide Phase Shifter for High-Power Microwave Systems
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Solution Overview
Problem
Existing phase shifters have limitations in achieving a 180° phase shift between microwave pulses due to material constraints, stability issues with external circuit control, and high voltage requirements, leading to limited phase shift range and power loss.
Innovation Solution
A phase shifter with a rotating part having a hollow structure where the distance between the circumference of the cross section and the rotation center changes periodically, enabling a 180° phase shift between two adjacent microwave pulses through mechanical rotation, eliminating the need for external circuit control and ferrite materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If ferrite materials and external circuits are used to change phase, then phase shift speed is improved, but device complexity and voltage requirements increase
Solution Approach 1:
The patent removes ferrite materials and external control circuits from the phase shifter structure, extracting the complex components while maintaining the phase shifting function through a simpler mechanical rotation approach
Solution Approach 2:
The patent replaces the electromagnetic control mechanism (using ferrite and external circuits) with a mechanical rotation system, where a rotatable component changes the waveguide geometry to achieve phase shifting without requiring high-voltage external circuits
2Speed
If ferrite-based phase shifters are used, then fast phase shift is achieved, but material limitations and design difficulty increase
Solution Approach 1:
The patent extracts the ferrite material from the phase shifter structure, eliminating material limitations and simplifying the design process while maintaining fast phase shifting capability through geometric modification
Solution Approach 2:
The patent changes the geometric parameters of the waveguide structure through rotation, modifying the effective path length and cross-sectional dimensions to achieve phase shifting without relying on ferrite material properties
3Ease of operation
If external circuit control is used to change material parameters, then phase shift is achieved, but stability deteriorates due to voltage requirements
Solution Approach 1:
The patent replaces the unstable external circuit control system with a mechanically stable rotation system, where the phase shift is controlled by physical rotation of a component rather than by high-voltage electrical signals that are prone to instability
4Ease of operation
If conventional phase shifters are used, then phase change is achieved, but power loss increases due to reflection and limited transmission
Solution Approach 1:
The patent continuously changes the geometric parameters of the waveguide through rotation, optimizing the transmission characteristics and minimizing reflection losses while achieving the desired phase shift
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 mechanical phase shifter achieves a 180° phase shift with improved stability and reduced power loss, allowing for faster phase shifting and higher repetition frequencies, enhancing the performance in high-power microwave applications.
Implementation Method 1
the distance between a circumference of the cross section of the first cavity and a rotation center of the rotating part changes periodically and continuously in a peripheral direction, such that when the rotatory part rotates, a phase shift occurs between two adjacent microwave pulses
Data Source
AI summary
The present disclosure relates to a phase shifter, an accelerator, and an operating method therefor. The phase shifter comprises a rotating part having a first hollow structure, the first hollow structure having a first cavity, a distance between a circumference of the cross section of the first cavity and a rotation center of the rotating part changing periodically and continuously in a peripheral direction, such that when the rotatory part rotates, a phase shift occurs between two adjacent microwave pulses at an outlet of the phase shifter. The operating method comprises transmitting a microwave pulse within the accelerator at a repetitive frequency v Hertz; the driving devices drives the rotating part to rotate at a rotation speed of n RPM, wherein n=15v*m, m is an odd number, 1, 3, 5 . . . , such that when transmitting a microwave pulse each time, the long axis of the oval cross section of the first cavity of the rotatory part is rotated to a horizontal or vertical state.