High Frequency Filter Inner Conductor Coupling Element
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing high-pass filters in coaxial structures require multiple inner conductor portions to achieve the necessary blocking characteristics, leading to high tolerance sensitivity and compact design challenges, especially in mobile technology where small distances between line sections are critical.
Innovation Solution
Incorporating an additional inner conductor coupling element, which can be metallic or dielectrically conductive, to enhance capacitive coupling between inner conductor portions, allowing for the generation of additional locking poles and reducing sensitivity, enabling a more compact and stable filter design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple inner conductor portions are used to achieve necessary blocking characteristics, then the filter performance is improved, but the tolerance sensitivity increases and the design becomes more complex
Solution Approach 1:
The patent introduces an intermediate structure (the coupling element with cavity) between the inner conductor portions to mediate the capacitive coupling. This intermediary structure provides a controlled environment for the electric field interaction, reducing sensitivity to dimensional variations of the inner conductor portions themselves while maintaining the necessary coupling characteristics for filter performance
2Volume of moving object
If the distance between inner conductor portions is reduced to maintain compact size, then the capacitive coupling increases, but the tolerance sensitivity increases
Solution Approach 1:
The coupling element acts as an intermediary that allows compact spacing between inner conductor portions while providing a controlled cavity structure. This mediator stabilizes the electric field distribution in the reduced space, enabling strong capacitive coupling without proportionally increasing tolerance sensitivity to manufacturing variations
3Reliability
If additional inner conductor portions are added to improve blocking characteristics, then the filter performance improves, but the device complexity increases
Solution Approach 1:
The coupling element with its cavity structure serves multiple functions simultaneously: it provides the necessary capacitive coupling between inner conductor portions, creates the locking pole through its geometric configuration, and maintains mechanical support. This multi-functionality reduces the need for additional separate components, thereby improving blocking characteristics without proportionally increasing device 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
The solution results in improved electrical properties, reduced tolerance sensitivity, and a more compact design with lower production costs, while maintaining mechanical stability and good intermodulation behavior, suitable for use in mobile radio technology.
Implementation Method 1
The inner conductor portions have (if the entire arrangement should have a compact size) usually very low dimensioned interruptions, whereby the corresponding inner conductor portions are coupled to their end faces capacitively.
Implementation Method 2
The front-side capacitive coupling between the inner conductors also increases with increasing cross-sectional area of the lines and with increasing dielectric constant of the material, which can be in the gap between the lines.
Data Source
Figure 1a~1b
Figure 1c~1e
Figure 2a~2k
AI summary
The invention relates to an improved high frequency filter (high pass filter) that is characterized by the following features: in addition to the at least both capacitively coupled inner conductor front faces (5b) or the capacitively coupled inner conductor end segments (5c) of two coupled inner conductor segments (5a), at least one further inner conductor coupling device (15) or at least one further inner conductor coupling element (115) is provided, the at least one further inner conductor coupling device (15) or the at least one further inner conductor coupling element (115) is arranged in an at least partially overlapping manner with the inner conductor end segments (5c) of the coupled inner conductor segments (5b), and the branch line (7) runs between the inner conductor coupling device (15) or the inner conductor coupling element (115) and the outer conductor (1).