Multiplex Filter With Dielectric Resonators For TM Mode Transmission
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Solution Overview
Problem
Existing multiplex filters for transmitting TM modes require significant space and are costly, as they need to accommodate multiple signal transmission paths while maintaining filter properties.
Innovation Solution
A compact multiplex filter design with a housing that includes a base, cover, and wall, featuring metal or metal-comprising dividing devices to create resonator chambers, where dielectrics are used to couple resonators perpendicularly to the H field, allowing for efficient signal transmission and adjustment of resonant frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple signal transmission paths are accommodated in existing multiplex filters, then filter functionality is achieved, but space requirements increase significantly
Solution Approach 1:
The patent transitions from planar arrangement of resonators to a three-dimensional stacked configuration where multiple filter chambers are arranged vertically along the signal transmission direction. This dimensional change allows multiple signal paths to coexist in the same footprint area by utilizing the vertical dimension, thereby reducing the horizontal space requirements while maintaining full filter functionality.
Solution Approach 2:
The patent implements a nested structure where multiple filter chambers are stacked within a single housing, with each chamber containing resonators for different frequency bands. The dividing devices partition the vertical space into functional segments, allowing multiple filter functions to be nested within a compact volume, effectively reducing the overall device footprint.
2Adaptability or versatility
If multiple signal transmission paths are implemented, then multiplex filtering capability is achieved, but manufacturing cost increases
Solution Approach 1:
The patent divides the filter into multiple independent filter chambers, each handling specific frequency bands or signal paths. This segmentation allows for modular manufacturing where each chamber can be produced and tested independently, then assembled into the complete multiplex filter. The dividing devices serve as both functional partitions and manufacturing interfaces, simplifying production and reducing overall cost.
Solution Approach 2:
The housing structure serves multiple functions simultaneously: it provides mechanical support, electrical grounding through the dividing devices, and defines the boundaries for multiple filter chambers. This multi-functionality reduces the need for additional components and simplifies the manufacturing process, thereby reducing costs while maintaining multiplex filtering capability.
3Ease of operation
If resonator chambers are coupled in existing designs, then signal transmission is achieved, but structural complexity increases
Solution Approach 1:
The patent merges the functions of signal coupling and structural partitioning into the dividing devices. These dividing devices simultaneously serve as the walls separating adjacent filter chambers and as the coupling structures that enable signal transmission between chambers through integrated coupling openings. This merging eliminates the need for separate coupling components, thereby reducing structural complexity while maintaining effective signal transmission.
Solution Approach 2:
The dividing devices act as intermediary structures between adjacent filter chambers, providing both mechanical separation and electromagnetic coupling. The coupling openings in the dividing devices mediate the signal transmission between chambers while maintaining the structural integrity and electrical grounding of the partition walls, simplifying the overall architecture.
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 achieves a compact and cost-effective multiplex filter that efficiently transmits TM modes by decoupling resonator chambers and allowing for precise adjustment of resonant frequencies, reducing space requirements and operational complexity.
Implementation Method 1
each of which forms a resonator... The resonator chambers located in each filter chamber and thus the respective resonators are decoupled from one another by the dividing devices located in the respective filter chamber
Implementation Method 2
at least n dielectrics are formed, of which at least one is arranged in each filter chamber... at least one dielectric being formed in one piece with the at least one of the n-1 separators
Data Source
AI summary
Multiplex filter (1) with a housing (2) comprising a housing base (3), a housing cover (4) spaced apart from the housing base (3), and a housing wall (5) surrounding the housing base (3) and the housing cover (4). At least n filter chambers (71), each with a dielectric (81), are enclosed by the housing (2) and/or at least one insert (111) located in the housing (2). Each filter chamber (71) has at least one partitioning device (131) made of or comprising metal, arranged such that it divides the respective filter chamber into at least m resonator chambers (61_1, ..., 61_m), each of which forms a resonator. The partitioning devices (131) are arranged parallel to the central axis (12) and divide the n filter chambers (71) into m resonator chambers (61_1, ..., 61_m).A common connection (14) is led through a first opening in the housing (2) into the first filter chamber (71) and is coupled in this to the resonators of the m resonator chambers (61_1, ..., 61_m).