Elastic Terminal Cavity Filter for Stable RF Pin Connection
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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 lateral tension while allowing relative motion between separable RF pins.
Innovation Solution
A cavity filter design with an RF signal connecting portion and a terminal portion that includes a first terminal in contact with an electrode pad, a second terminal connected to the RF signal connecting portion, and an elastic member between the terminals, surrounded by a dielectric body to absorb assembly tolerance and maintain contact area, allowing for lateral tension to prevent signal disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a cavity filter is designed with a slimmer and more compact structure, then the filter size is reduced, but the assembly tolerance accumulates and connection stability deteriorates
Solution Approach 1:
The terminal portion is designed with elastic members (springs) that enable dynamic adjustment and compensation for assembly tolerances. The elastic member allows the terminal to flex and adapt to dimensional variations in the dielectric body and external device, maintaining stable electrical connection despite the compact filter size.
Solution Approach 2:
The terminal portion structure changes its physical state through the elastic member, which can compress or extend to accommodate assembly tolerances. This parameter change allows the terminal to maintain optimal contact pressure and electrical connection stability within the reduced filter volume.
2Reliability
If an elastic member is added between terminals to absorb assembly tolerance, then connection stability is improved, but device complexity increases
Solution Approach 1:
The elastic member is integrated directly into the terminal portion structure, merging the connection function with the tolerance compensation function. The terminal portion combines both the electrical connection element and the elastic compensation mechanism into a single integrated component, reducing overall device complexity.
Solution Approach 2:
The terminal portion serves multiple functions: it provides electrical connection, absorbs assembly tolerance, and maintains contact pressure. The elastic member within the terminal portion performs both mechanical support and tolerance compensation, making the terminal a multi-functional component that improves reliability without proportionally increasing complexity.
3Manufacturing precision
If a dielectric body surrounds the terminal portion to maintain frequency characteristics, then manufacturing precision is improved, but the filter structure becomes more complex
Solution Approach 1:
The terminal portion is nested within the dielectric body, with the dielectric material surrounding and supporting the terminal structure. This nested arrangement allows the dielectric body to provide mechanical support and maintain frequency characteristics while the terminal portion remains integrated within the same structural envelope, minimizing overall complexity.
4Reliability
If lateral tension is applied to prevent signal loss, then reliability is improved, but the terminal structure requires additional design elements
Solution Approach 1:
The elastic member provides dynamic tension compensation, allowing the terminal to maintain optimal lateral tension for signal transmission. The spring mechanism automatically adjusts to maintain contact pressure and prevent signal loss without requiring complex additional design elements.
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, easy mounting, uniform frequency maintenance, and stable connections, preventing antenna performance degradation by allowing relative motion and applying lateral tension.
Implementation Method 1
an elastic member provided between the first terminal and the second terminal
Data Source
AI summary
The present invention relates to a cavity filter. 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 is divided into a first side terminal contacted with the electrode pad and a second side terminal connected to the RF signal connecting portion, absorbs the assembly tolerance existing in a terminal insertion port, in which the terminal portion is provided, through an elastic member provided between the first side terminal and the second side terminal, and prevents disconnection of an electric flow, thereby preventing degradation in performance of an antenna device.