Dual-Mode Dielectric Waveguide Filter With Adjustable Cavity Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional dual-layer dielectric waveguide filters face challenges due to low Q value, high insertion loss, and non-adjustable coupling structures, which complicate production and debugging.
Innovation Solution
A dual-mode dielectric waveguide filter with integrally formed dielectric cavities and a coupling portion, where the electric field directions of the cavities are perpendicular, allowing direct coupling without additional welding, facilitating production and enabling adjustable coupling for improved Q value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer dielectric filter is used, then the structure is simple, but the quality (Q) value is low and insertion loss is high
Solution Approach 1:
The patent combines multiple dielectric layers into an integrated structure where dielectric bodies are directly connected without welding. This merging approach maintains structural simplicity while achieving high Q values through the dual-mode resonance mechanism inherent in the integrated design.
Solution Approach 2:
The patent employs composite dielectric structures with multiple layers having different dielectric constants and geometries. This composite approach enables simultaneous achievement of simple overall structure and high Q values through material property optimization.
2Reliability
If a conventional dual-layer structure is used, then the quality (Q) value is improved, but the coupling structure is non-adjustable and productivity is poor
Solution Approach 1:
The patent merges the coupling structure directly into the dielectric bodies through integral connection without separate welding components. This eliminates the need for post-assembly welding operations, significantly improving productivity while maintaining the dual-layer Q value enhancement.
Solution Approach 2:
The coupling structure is pre-integrated into the dielectric bodies during manufacturing rather than being assembled later. This preliminary action of incorporating coupling paths directly into the dielectric structure eliminates subsequent welding steps and enables adjustable coupling through design parameters.
3Reliability
If dual-mode dielectric cavities are welded by a coupling plate, then the coupling is achieved, but the coupling structure is non-adjustable and debugging is difficult
Solution Approach 1:
The patent extracts the coupling function from separate welding plates and integrates it directly into the dielectric bodies. This extraction of the coupling mechanism from auxiliary components to the main structure enables adjustable coupling through dielectric geometry control and simplifies debugging.
Solution Approach 2:
The patent introduces adjustability into the coupling structure through design parameters such as dielectric body dimensions, positions, and orientations. This dynamic capability allows coupling strength to be tuned during debugging without requiring physical modifications or welding adjustments.
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 enhances the Q value of the filter, reduces production complexity, and allows for adjustable coupling, improving the filter's bandwidth and selectivity without the need for welding, thus addressing the limitations of conventional filters.
Implementation Method 1
a coupling portion connected with the first dielectric body and the second dielectric body to provide coupling of the first dielectric cavity and the second dielectric cavity
Implementation Method 2
A dual-mode dielectric waveguide filter includes a first dielectric cavity including a first dielectric body, a second dielectric cavity including a second dielectric body
Data Source
AI summary
A dual-mode dielectric waveguide filter and a filtering apparatus are provided. The dual-mode dielectric waveguide filter includes a first dielectric cavity including a first dielectric body, a second dielectric cavity including a second dielectric body, electric field directions of the first dielectric cavity and the second dielectric cavity being perpendicular to each other, and a coupling portion connected with the first dielectric body and the second dielectric body to provide a coupling of the first dielectric cavity and the second dielectric cavity, where the first dielectric body and the second dielectric body are both formed in a rectangular parallelepiped shape, the first dielectric body and the second dielectric body are arranged in a stacked manner in a first direction, and two end faces of the first dielectric cavity and the second dielectric cavity in the third direction are formed as a coupling end face.