Waveguide Nonreflective Terminator with Absorber Holes
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Solution Overview
Problem
The existing waveguide non-reflective terminators face challenges in manufacturing due to the complexity of integrating radio wave absorbers during the layering fabrication process, as they require precise placement inside the waveguide unit after its formation, making it difficult to form the waveguide unit with absorbers using layering fabrication techniques.
Innovation Solution
A waveguide non-reflective terminator design that incorporates radio wave absorbers into through holes in the short circuit plane of the waveguide unit, allowing the waveguide unit to be fabricated separately from the absorbers, enabling easier integration and manufacturing through layering fabrication by inserting absorbers through these holes, which are specifically designed to absorb signals without gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the radio wave absorber is disposed inside the waveguide unit using conventional manufacturing methods, then the terminator function is achieved, but the manufacturing complexity increases and layering fabrication becomes difficult
Solution Approach 1:
The terminator is divided into two independent parts: the waveguide unit and the radio wave absorber. The waveguide unit can be manufactured separately using layering fabrication, and the absorber is inserted into pre-formed through-holes, eliminating the need for complex integrated manufacturing
Solution Approach 2:
Through-holes are pre-formed in the waveguide unit during its manufacturing process before the absorber is inserted. This preliminary preparation simplifies the overall manufacturing by allowing the waveguide unit to be completed independently, with absorber insertion being a simple subsequent step
2Adaptability or versatility
If the radio wave absorber is disposed in the middle of the layering fabrication process, then integration is achieved, but the fabrication process becomes technically difficult and complex
Solution Approach 1:
The fabrication process is segmented into independent stages: waveguide unit fabrication and absorber insertion. This allows the waveguide unit to be manufactured using standard layering fabrication techniques without interruption, maintaining process simplicity while achieving integration
Solution Approach 2:
Through-holes are pre-formed in the waveguide unit during its fabrication process. This preliminary action enables the absorber to be inserted afterward without requiring complex mid-process integration, making the overall process adaptable to layering fabrication while keeping each stage simple
3Ease of manufacture
If the waveguide unit is completely formed by layering fabrication, then manufacturing simplicity is maintained, but disposing the radio wave absorber inside becomes a highly complex process
Solution Approach 1:
Through-holes are pre-formed in the waveguide unit during its layering fabrication process. This preliminary preparation ensures that once the waveguide unit is completely formed, the absorber can be easily inserted through these pre-formed holes, avoiding complex post-fabrication modification processes
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 design facilitates the formation of a waveguide terminator suitable for layering fabrication, improving manufacturing efficiency and flexibility by allowing the waveguide unit to be formed independently of the absorbers, ensuring effective signal absorption with reflection coefficients below -25 dB in the specified frequency range.
Implementation Method 1
a radio wave absorber disposed inside the waveguide unit and absorbing a radio wave propagating inside the waveguide unit
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A waveguide unit (2) is closed at one end thereof by a short circuit plane (2a) provided with through holes (3-1 to 3-6). Radio wave absorbers (4-1 to 4-6) absorb a frequency signal being a non-reflective target in the state of being inserted through the through holes (3-1 to 3-6) toward the inside of the waveguide unit (2) and contacting inner surfaces (3'-1 to 3'-6) of the through holes (3-1 to 3-6).