Waveguide Microwave Combiner With Transverse Bars for Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional microwave generators, such as magnetrons, have unstable frequency and power limitations, while solid state generators lack high power output due to coaxial power limitations, necessitating a solution to combine multiple solid state sources efficiently while improving heat dissipation.
Innovation Solution
A microwave coupling/combining device with a waveguide and transverse bars for coaxial connectors, allowing for compact, high-power microwave generation by aligning conductive antennas with transverse bars for efficient heat dissipation and phase control, suitable for industrial, scientific, and medical frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If solid state microwave generators are combined to increase power output, then microwave power is improved, but heat dissipation becomes insufficient
Solution Approach 1:
The patent transitions from coaxial cable transmission to waveguide transmission, changing the dimensional configuration of power combining. The waveguide structure with transverse bars provides superior thermal management by distributing heat across a larger surface area and enabling more effective heat dissipation pathways, resolving the heat dissipation bottleneck when combining multiple solid state sources.
Solution Approach 2:
The waveguide structure acts as an intermediary between multiple solid state microwave generators. The transverse bars within the waveguide serve as intermediate heat dissipation elements, facilitating thermal management while enabling power combining. This intermediary structure resolves both the power combining requirement and the heat dissipation challenge.
2Power
If coaxial probes are used for power combining, then coupling is achieved, but thermal dissipation efficiency deteriorates
Solution Approach 1:
The patent extracts the thermal management function from the coaxial probe structure and implements it separately through the waveguide with transverse bars. By separating the power combining function (coaxial connectors) from the thermal dissipation function (waveguide structure), the system achieves efficient power combining without the thermal dissipation penalties of coaxial probes.
3Power
If multiple solid state sources are combined, then microwave power output is increased, but device complexity increases
Solution Approach 1:
The patent merges multiple solid state microwave generators into a single waveguide structure. The waveguide with its transverse bars provides a unified platform for combining powers from multiple sources, reducing overall system complexity compared to using separate coaxial probe assemblies for each source combination.
4Power
If waveguide with external coaxial connectors is used, then power combining is enabled, but compactness is reduced
Solution Approach 1:
The patent implements a nested configuration where coaxial connectors are mounted on the waveguide structure with their conductive antennas extending inside the waveguide. This nesting arrangement allows power combining functionality while maintaining a compact overall form factor, as the combining elements are integrated within the waveguide volume rather than adding external bulk.
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 solution enables increased microwave output power with improved heat dissipation and compact configuration, addressing the limitations of existing technologies by efficiently combining multiple solid state sources and allowing for adjustable frequency and phase synchronization.
Implementation Method 1
a microwave coupling/combining device for coupling and combining at least two microwave sources, comprising a waveguide provided with: a sleeve extending longitudinally along a main axis
Implementation Method 2
a first end provided with a short-circuiting element and a second open end; and at least one transverse bar extending inside the sleeve along a transverse axis orthogonal to the main axis
Implementation Method 3
each coaxial connector is mounted externally on the sleeve and has a conductive central core connected to and extended by a conductive antenna extending inside the conductive sleeve
Data Source
AI summary
A microwave coupling/combining device for coupling and combining at least two microwave sources includes a waveguide provided with a sleeve extending longitudinally along a main axis and having two opposing ends having a first end provided with an element forming a short-circuit and a second open end. The device further includes at least one transverse bar extending inside the sleeve along a transverse axis orthogonal to the main axis; and at least two coaxial connectors provided for being connected respectively to microwave sources. Each coaxial connector is mounted externally on the sleeve and has a central conductive core connected to and extended by a conductive antenna extending in a direction orthogonal to the transverse axis and to the main axis inside the sleeve and ending by an end attached to a transverse bar.