Combiner Clapboard Coupling for Low Insertion Loss
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Solution Overview
Problem
Traditional combiners with dually layered cavities face challenges in assembly complexity, increased nonlinear factors due to welding, and high insertion loss, especially when using additional harmonic cavities for coupling, which complicates manufacturing and increases size and costs.
Innovation Solution
A combiner design utilizing a clapboard to separate the cavity into upper and lower layers, with coupling discs and holes that eliminate the need for welding and reduce the number of harmonic cavities, allowing direct assembly and efficient bandwidth distribution between filter paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two wires are welded to connect upper and lower harmonic cavities, then the filter paths are coupled together, but assembly complexity and labor consumption increase
Solution Approach 1:
The patent removes the welding process and wire connections from the system by introducing a clampboard structure. The clampboard directly connects the upper and lower harmonic cavities through integrated coupling holes, eliminating the need for separate wires and welding operations, thus reducing assembly complexity while maintaining coupling reliability
Solution Approach 2:
The clampboard merges the functions of mechanical support and electrical coupling into a single integrated component. By combining the structural support function with the signal coupling function, the patent eliminates the need for separate wires and welding processes, simplifying the overall assembly
2Reliability
If two wires are welded to connect cavities, then coupling is achieved, but nonlinear factors of the cavity increase
Solution Approach 1:
The patent extracts the welding process and wire connections from the system, replacing them with a direct clampboard coupling mechanism. This eliminates the nonlinear factors introduced by welding spots and wire joints, as the clampboard provides a continuous, uniform coupling path between cavities
3Reliability
If a common harmonic cavity is added between upper and lower cavities, then coupling is realized, but insertion loss increases
Solution Approach 1:
The patent removes the additional common harmonic cavity from the system and uses the clampboard's integrated coupling holes to achieve direct coupling between upper and lower cavities. This eliminates the extra cavity that would introduce additional insertion loss, while still providing effective coupling through the clampboard structure
4Reliability
If a common cavity is placed in middle position, then coupling between upper and lower cavities is achieved, but manufacturing difficulty and tuning complexity increase
Solution Approach 1:
The patent merges the coupling function into the clampboard structure itself, which is a standard component already present in the combiner. The coupling holes are integrated into the clampboard during its manufacture, eliminating the need for separate common cavity assembly and reducing both manufacturing difficulty and tuning complexity
Data Source
AI summary
A combiner with a common port and a dually layered cavity includes a cavity, a clapboard used for dividing the cavity into an upper cavity and a lower cavity, a common port, a number of signal posts, and a first coupling disc, said common port and said number of signal ports being disposed at two sides of the cavity respectively. The upper cavity and the lower cavity are each provided with a number of filter paths, and an upper common harmonic post and a lower common harmonic post are disposed at a location close to the common port; a first coupling hole is defined in the clapboard at a location close to the common port, and the first coupling disc is disposed in the first coupling hole and connected with the common port.