Elastic Terminal Cavity Filter Absorbs Assembly Tolerance
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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 and assembly inaccuracies.
Innovation Solution
The design incorporates an RF signal connecting portion with a terminal portion that includes an elastic deformable first side terminal and a second side terminal, which absorbs assembly tolerance and maintains constant contact with an electrode pad, allowing for lateral tension to prevent disconnection and facilitate easy assembly and mounting.
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 device size and mounting space are reduced, but the assembly tolerance accumulation and connection reliability become more difficult to control
Solution Approach 1:
The terminal portion is designed as an elastic deformable body that can dynamically adjust its shape during assembly. When assembly force is applied, the terminal portion radially widens or narrows to accommodate position deviations, thereby absorbing assembly tolerance and ensuring reliable electrical connection in the compact filter structure
Solution Approach 2:
The terminal portion changes its physical parameters (radial dimension) in response to assembly force. This parameter change allows the terminal to adapt to position deviations between the filter and PCB, maintaining connection reliability despite the reduced filter size
2Ease of manufacture
If separable RF pins are used for mounting, then the ease of assembly and mounting is improved, but signal loss occurs due to connection disconnection
Solution Approach 1:
The elastic terminal portion maintains continuous contact with the electrode pad through its deformable nature, preventing disconnection while allowing easy assembly. The terminal radially widens or narrows under assembly force to ensure reliable connection, eliminating signal loss associated with separable RF pins
Solution Approach 2:
The terminal portion self-adjusts its radial dimension in response to assembly force, automatically compensating for position deviations and ensuring reliable connection without requiring precise manual alignment, thus preventing signal loss while maintaining ease of assembly
3Reliability
If the terminal portion is designed as an elastic deformable body that radially widens or narrows against assembly force, then assembly tolerance is absorbed and connection reliability is improved, but the device complexity increases
Solution Approach 1:
The terminal portion integrates multiple functions into a single component: electrical connection, mechanical support, and tolerance absorption. This merging reduces the need for separate adjustment mechanisms, thereby improving connection reliability without significantly increasing overall device 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
This configuration results in a slimmer, more compact cavity filter with reduced assembly tolerance, stable RF connections, and consistent frequency characteristics, enhancing antenna performance by minimizing signal loss and assembly errors.
Implementation Method 1
the first side terminal is provided as an elastic deformable body whose part is radially widened or narrowed against an assembly force provided by an assembler
Implementation Method 2
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
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: a first side terminal contacted with the electrode pad; and a second side terminal having a housing space in which a part of the first side terminal is housed, and connected to the RF signal connecting portion, wherein the first side terminal is provided as an elastic deformable body whose part is radially widened or narrowed against an assembly force provided by an assembler. 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.