Nested RF Terminal Structure in Cavity Filters for Stable Assembly Contact
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Solution Overview
Problem
Current cavity filters for massive MIMO antennas face challenges in achieving a slimmer, more compact structure with embedded RF connectors, minimizing assembly tolerance, maintaining uniform frequency characteristics, and preventing signal loss due to separable RF pins, while ensuring constant contact area and easy assembly.
Innovation Solution
A cavity filter design with an RF signal connecting portion and a terminal portion that applies lateral tension to absorb assembly tolerance, prevent disconnection, and maintain constant contact, featuring elastic deformation and cut pieces for secure connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a slimmer and more compact cavity filter structure is designed with embedded RF connectors, then the filter size is reduced, but assembly tolerance accumulation increases
Solution Approach 1:
The terminal portion is inserted into the housing of the other terminal, creating a nested structure where one component fits inside another. This nesting approach allows the connector to maintain a compact overall size while providing internal clearance and elastic deformation space, thereby reducing assembly tolerance accumulation despite the slimmed-down form factor.
Solution Approach 2:
The terminal portion is designed with elastic deformability, allowing it to change its physical parameters (shape, position) during assembly. This elastic deformation capability enables the terminal to accommodate assembly tolerances by deforming within the housing space, maintaining precise electrical connection despite variations in manufacturing tolerances.
2Ease of operation
If separable RF pins are used for mounting, then ease of assembly is improved, but signal loss occurs due to connection instability
Solution Approach 1:
The terminal portion transitions from a rigid structure to a dynamically adaptable one through elastic deformation. During assembly, the terminal can deform to accommodate misalignments and maintain optimal contact pressure, ensuring stable signal connection. The dynamic elastic response allows the separable connector to self-adjust and maintain reliability under varying assembly conditions.
3Productivity
If multiple filters are assembled closely, then productivity is improved, but assembly tolerance accumulation worsens
Solution Approach 1:
The nested structure of the terminal within the housing provides internal absorption space for assembly tolerances. When multiple filters are assembled in close proximity, each terminal-housing assembly independently absorbs its own tolerance variations through the elastic deformation capability, preventing tolerance accumulation from propagating across multiple assembled units.
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 results in a slimmer, more compact filter with reduced assembly tolerance, stable RF signal connection, and maintained frequency characteristics, preventing signal degradation and facilitating easy mounting.
Implementation Method 1
a part of the at least one side terminal is elastically deformed by an assembly force provided by an assembler
Implementation Method 2
applies lateral tension to the other side terminal while elastically supporting the other side terminal toward the electrode pad
Data Source
AI summary
The present invention relates to a cavity filter and a connecting structure included therein. The cavity filter includes: an RF signal connecting portion spaced apart, by a predetermined distance, from an outer member having an electrode pad provided on a surface thereof; and a terminal portion configured to electrically connect the electrode pad of the outer member and the RF signal connecting portion so as to absorb assembly tolerance existing at the predetermined distance and to prevent disconnection of the electric flow between the electrode pad and the RF signal connecting portion, wherein the terminal portion includes: first side terminal contacted with the electrode pad; and the second side terminal connected to the RF signal connecting portion, wherein at least any one of the first side terminal and the second side terminal has a housing space in which the other side terminal is housed, and a part of the at least one side terminal is elastically deformed by an assembly force provided by an assembler, and applies lateral tension to the other side terminal while elastically supporting the other side terminal toward the electrode pad. Therefore, the cavity filter can efficiently absorb assembly tolerance which occurs through assembly design, and prevent disconnection of an electric flow, thereby preventing degradation in performance of an antenna device.