Dielectric Waveguide Filter With Non-Overlapping Tuning Holes
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Solution Overview
Problem
Dielectric waveguide filters face challenges in miniaturization and debugging due to the need for capacitive coupling columns or double-sided cavity configurations, which increase complexity and size, limiting their application in 5G communication systems.
Innovation Solution
A dielectric waveguide filter design featuring a dielectric main body with isolation slots and frequency tuning blind holes on opposite sides, eliminating the need for capacitive coupling columns, allowing for the generation of transmission zeros without overlapping port signal transmission holes, thereby simplifying debugging and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If capacitive coupling column is used to achieve multi-zero structure, then out-of-band rejection capability is improved, but device complexity and debugging difficulty increase
Solution Approach 1:
The patent removes the capacitive coupling column from the filter structure and replaces it with a multi-zero structure formed by port signal transmission holes and frequency tuning blind holes directly in the dielectric main body. This extraction of the problematic component eliminates the debugging difficulties while maintaining the out-of-band rejection capability through the alternative multi-zero configuration.
2Reliability
If double-sided rows of cavities are used to achieve multi-zero structure, then out-of-band rejection capability is improved, but filter size increases
Solution Approach 1:
The patent merges the functions of multiple cavities into a single dielectric main body by creating frequency tuning blind holes and port signal transmission holes within the same structure. This consolidation achieves the multi-zero structure needed for out-of-band rejection while significantly reducing the overall filter size compared to using separate double-sided cavity rows.
3Reliability
If multi-zero structure is implemented with traditional methods, then out-of-band rejection capability is improved, but manufacturing cost and labor hours increase
Solution Approach 1:
The patent changes the structural parameters by eliminating the capacitive coupling column and reconfiguring the filter using blind holes and transmission holes with specific dimensional relationships. This parameter change simplifies the manufacturing process, reduces labor hours, and lowers production costs while maintaining the required out-of-band rejection capability through the multi-zero structure.
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 achieves miniaturization and expands the application range of dielectric waveguide filters by reducing debugging difficulties and labor-hour costs, while enhancing out-of-band rejection capability without the need for capacitive coupling columns.
Implementation Method 1
a signal inputted from the at least one port signal transmission hole generates a transmission zero by passing through the at least one frequency tuning blind hole
Data Source
AI summary
Provided is a dielectric waveguide filter that includes a dielectric main body. A plurality of isolation slots and frequency tuning blind holes are provided in the dielectric main body. At least two port signal transmission holes are further provided in the dielectric main body. The at least two port signal transmission holes and at least part of the plurality of frequency tuning blind holes are disposed on two opposite sides of the dielectric main body. In a thickness direction of the dielectric main body, the at least two port signal transmission holes do not overlap with the at least part of the plurality of frequency tuning blind holes. The dielectric waveguide filter according to embodiments of this disclosure achieves miniaturization while improving out-of-band rejection capability.