Recessed Ferrite Tile Waveguide for Uniform RF Load Absorption
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Solution Overview
Problem
Current dry RF load designs attenuate most of the incident energy in the front end, leading to uneven heating and potential RF arcing, while liquid cooled loads are costly and prone to coolant leaks, posing safety and financial risks.
Innovation Solution
A waveguide design with recessed portions in the walls for embedding ferrite tiles, varying in depth to control RF energy absorption uniformly across the load, minimizing overheating and arcing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If ferrite tiles are embedded at uniform depth in waveguide walls, then manufacturing is simplified, but RF energy absorption becomes uneven causing front-end overheating and arcing
Solution Approach 1:
The patent applies local quality by varying the embedding depth of ferrite tiles based on their position in the waveguide. Tiles at the front end are embedded deeper than those at the rear end, creating a depth gradient that matches the RF energy distribution profile. This ensures uniform power absorption throughout the load while maintaining reliable operation without overheating or arcing.
2Temperature
If liquid cooled loads are used to dissipate RF energy, then cooling efficiency is improved, but system complexity and leak risk increase
Solution Approach 1:
The patent extracts the coolant system from the RF load design, transitioning from liquid-cooled to air-cooled operation. By removing the liquid cooling infrastructure, the patent eliminates leak risks and system complexity while maintaining effective heat dissipation through enhanced natural convection and radiation from the ferrite tile surfaces.
Solution Approach 2:
The patent replaces expensive, complex liquid cooling systems with a simpler, maintenance-free air cooling approach. The ferrite tiles themselves serve as both the RF absorbing element and the primary heat dissipation surface, eliminating the need for separate cooling infrastructure.
3Use of energy by moving object
If ferrite tiles are placed flush with waveguide wall surface, then RF energy absorption is maximized, but RF arcing risk increases
Solution Approach 1:
The patent applies preliminary anti-action by preemptively embedding ferrite tiles recessed into the waveguide walls rather than placing them flush with the surface. This preliminary positioning prevents RF arcing by ensuring that the ferrite tiles are surrounded by conductive wall material that acts as a shield, eliminating the need for additional protective measures.
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 design ensures consistent power absorption and reduced RF arcing by embedding ferrite tiles at varying depths, maintaining uniform power distribution and thermal stability.
Implementation Method 1
The energy is converted to heat and dissipated into either an air or liquid medium
Implementation Method 2
The energy is converted to heat and dissipated into either an air or liquid medium
Data Source
AI summary
A waveguide having a plurality of walls extending along a linear taper, each wall of the plurality of walls including a plurality of recessed portions and a plurality of ferrite tiles positioned in and adhered to the plurality of recessed portions. Each wall of the plurality of walls has a center portion and sidewall portions. The recessed portions in the center portion have a larger depth than the recessed portions near the sidewall portions.