Tunable Waveguide Termination with Internal Dielectric Taper
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Solution Overview
Problem
Existing microwave circuit tuning devices, such as the CPR284 ball tuner, require additional waveguide components and are difficult to retrofit in tight spaces, like medical equipment, leading to destabilization of microwave power sources due to impedance mismatches.
Innovation Solution
A tunable power absorbing waveguide termination with an internal coolant circulating dielectric taper and a position-adjustable tuner element, allowing for dynamic tuning without additional waveguide components, maximizing power absorption and protecting sensitive microwave sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a position adjustable tuning element is inserted into a waveguide flange with enlarged thickness, then the waveguide circuit can be tuned to correct impedance mismatches, but the overall length of the circuit increases making it difficult to install in tight spaces
Solution Approach 1:
The patent combines the tuning element directly within the waveguide termination structure itself, merging two previously separate components (tuner and termination) into one integrated unit. This eliminates the need for additional waveguide sections and flanges, thereby maintaining compact circuit length while providing impedance matching capability.
Solution Approach 2:
The waveguide termination structure is designed to perform multiple functions: it serves as both the power absorbing termination and the impedance tuning element. The adjustable component within the termination provides tuning capability across different operating conditions, making the single structure universally applicable for both termination and matching purposes.
2Reliability
If additional waveguide components are inserted to achieve system tuning, then impedance mismatches can be corrected, but the device complexity and difficulty of retrofitting existing equipment increases
Solution Approach 1:
The patent integrates the tuning mechanism within the existing waveguide termination structure, combining multiple functions into a single component. This reduces the total number of waveguide parts needed and simplifies the overall device complexity, making retrofitting of existing equipment more straightforward.
Solution Approach 2:
The waveguide termination structure incorporates self-adjusting or easily adjustable tuning elements that can be configured without requiring complex external tuning devices. The design allows the termination itself to provide the necessary tuning function, eliminating the need for separate tuning components and reducing installation complexity.
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 solution simplifies the retrofitting of existing microwave equipment by providing an integral tuning capability within the waveguide termination, effectively reducing power reflections and stabilizing microwave systems in tight spaces.
Implementation Method 1
A coolant circulating dielectric taper extends into the section of waveguide in an inclined orientation relative to a guidewall of the section of waveguide
Implementation Method 2
Power absorbing terminations in accordance with the invention can be easily tuned to maximize the power absorbed by the load
Implementation Method 3
A coolant circulating dielectric taper extends into the section of waveguide
Data Source
AI summary
A tunable power absorbing termination for a waveguide transmission line includes a section of waveguide having a front power feed end, a back power extracting end, and guidewalls extending between the front and back end thereof. A coolant circulating dielectric taper extends into the section of waveguide in an inclined orientation relative to a guidewall of the section of waveguide such that the point end of the taper extends substantially to the front power feed end of the waveguide section. The inclined orientation of the dielectric taper creates a free volume of space adjacent the taper behind the front power feed end of the waveguide section into which a tuner element is introduced which is position adjustable within the free volume of space to provide the power absorbing termination with a tuning capability.