L-Shaped Housing for Waveguide Filter Alignment
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Solution Overview
Problem
Traditional RF cavity filters require significant time and skilled technicians for tuning, are large and heavy due to air as a dielectric medium, and face challenges in manufacturing and assembly of ceramic waveguide filters with complex shapes, leading to high costs and size issues in Remote Radio Units (RRU).
Innovation Solution
A housing structure with an L-shaped outer structure, flexure portions, and reference datums is designed to maintain alignment of ceramic sections of waveguide filters, using ceramics with high dielectric constants to reduce size and cost, and incorporating flexure portions as tunable springs for precise alignment and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional RF cavity filters are used with air as dielectric medium, then the filter structure is simple, but the filter becomes large and heavy
Solution Approach 1:
The patent changes the dielectric parameter from air (low dielectric constant) to ceramic materials (high dielectric constant). This parameter change allows the filter to achieve the same electrical performance with significantly reduced physical dimensions, resolving the contradiction between filter size and manufacturing complexity.
Solution Approach 2:
The patent employs composite construction by combining multiple ceramic sections with different dielectric properties and mechanical characteristics. This allows optimization of both size reduction and manufacturing feasibility through material selection and combination.
2Manufacturing precision
If ceramic sections with complex shapes are manufactured and assembled, then the filter performance is improved, but the manufacturing and assembly costs increase
Solution Approach 1:
The patent incorporates preliminary alignment features directly into the ceramic sections during manufacturing. These built-in alignment features ensure precise positioning during assembly without requiring complex external fixtures or skilled manual adjustment, thus improving alignment precision while maintaining manufacturing ease.
Solution Approach 2:
The ceramic sections are designed with self-aligning characteristics that allow them to automatically position themselves correctly during assembly. This self-service mechanism eliminates the need for extensive manual tuning and skilled technician intervention, reducing both assembly complexity and cost.
3Reliability
If extensive tuning is performed to achieve proper filter alignment, then the filter performance is optimized, but the time and skilled technician requirements increase
Solution Approach 1:
The alignment features are pre-integrated into the ceramic sections during manufacturing, establishing correct geometric relationships before assembly. This preliminary action eliminates the need for extensive post-assembly tuning, significantly reducing both tuning time and the requirement for skilled technicians while maintaining filter performance reliability.
4Volume of moving object
If ceramics with high dielectric constants are used, then the filter size is reduced, but the thermal expansion differences between materials increase
Solution Approach 1:
The patent carefully selects ceramic materials with specific dielectric constants and matching thermal expansion coefficients. By changing and optimizing these material parameters, the design achieves size reduction while compensating for thermal expansion differences through material selection rather than structural 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 enables miniaturization of RF filters, reduces manufacturing complexity, and eliminates the need for extensive tuning, resulting in cost-effective and compact RF filters that maintain performance and accommodate thermal expansion differences between materials.
Implementation Method 1
a plurality of flexure portions, wherein at least one of flexure portion extends from an end portion of each of extended arms of the L-shaped outer structure
Implementation Method 2
the datums and the flexure portions are operative to maintain alignment of the sections of the waveguide filter relative to each other
Data Source
AI summary
Apparatuses, methods, and systems for a housing structure for maintaining alignment between ceramic sections of a bandpass filter are disclosed. One housing structure includes an L-shaped outer structure, a plurality of flexure portions, wherein at least one of flexure portion extends from an end portion of each of extended arms of the L-shaped outer structure, wherein each flexure portion extends inward perpendicular to each of the extended end portion, and a plurality of reference datums, wherein at least one reference datum is located between an L-joint of the L-shaped outer structure, and a one of the flexure portions. The housing structure operates to receive a plurality of sections of a waveguide filter, wherein each section includes a plurality of planar surfaces, wherein the datums and the flexure portions are operative to maintain alignment of the sections of the waveguide filter relative to each other.