Sliding Terminal Cavity Filter for Assembly Tolerance Compensation
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Solution Overview
Problem
Existing cavity filters face challenges in achieving a slimmer and more compact structure with embedded RF connectors, while maintaining uniform frequency characteristics and preventing signal loss due to assembly tolerance and relative motion of separable RF pins.
Innovation Solution
A cavity filter design with a terminal portion comprising first and second terminals connected by an elastic member, surrounded by a dielectric body, and reinforced by a reinforcement plate, allowing for lateral tension to absorb assembly tolerance and maintain electrical contact.
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 accumulates and connection reliability deteriorates
Solution Approach 1:
The terminal portion is designed with sliding capability between the first and second terminals, allowing dynamic adjustment to compensate for assembly tolerance. This sliding mechanism enables the connection structure to adapt to dimensional variations while maintaining reliable electrical contact in the compact filter design.
Solution Approach 2:
The terminal portion acts as an intermediary element between the RF connector and the cavity filter body. It provides a buffer zone that absorbs assembly tolerance through its sliding mechanism, preventing tolerance accumulation from directly affecting connection reliability in the compact structure.
2Ease of operation
If separable RF pins are used to enable easier assembly, then assembly ease is improved, but signal loss occurs due to relative motion between connectors
Solution Approach 1:
The terminal portion incorporates a controlled sliding mechanism that allows minimal relative motion during assembly for ease of connection, while maintaining stable electrical contact during operation. This dynamic design enables separable RF pins to be assembled easily without causing signal loss during normal use.
Solution Approach 2:
The sliding capability of the terminal portion changes the contact state from rigid to flexible, allowing the connection to accommodate assembly variations. This parameter change enables the separable RF pins to maintain stable electrical contact while facilitating easier assembly operations.
3Measurement precision
If individual cavity filters are tuned to maintain frequency characteristics, then frequency precision is improved, but manufacturing complexity increases due to post-assembly tuning requirements
Solution Approach 1:
The terminal portion is pre-designed with sliding capability and appropriate clearance to inherently compensate for assembly tolerance. This preliminary design action eliminates the need for post-assembly tuning of individual cavity filters, maintaining frequency characteristics while reducing manufacturing complexity.
Solution Approach 2:
The sliding terminal portion automatically compensates for assembly tolerance variations through its inherent mechanical design. This self-service mechanism maintains frequency characteristics without requiring external tuning operations, thereby reducing manufacturing complexity while preserving measurement precision.
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 achieves a slimmer structure with stable RF connections, minimizing assembly tolerance, and maintaining frequency characteristics by allowing relative motion without signal disruption.
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.