RF Connector Terminal Structure for Cavity Filter Assembly Tolerance
Find Innovative SolutionsGenerate Solutions
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 and ensuring constant contact area for stable electrical connections.
Innovation Solution
The cavity filter incorporates an RF signal connecting portion with a terminal portion that includes a first and second terminal, a dielectric body, and an elastic member to absorb assembly tolerance, prevent electric flow disruption, and maintain contact area, featuring a reinforcement plate and O-ring structure for impedance matching and assembly support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cavity filter structure is made slimmer and more compact with embedded RF connectors, then the size and mounting space are reduced, but the assembly tolerance and connection reliability become more difficult to control
Solution Approach 1:
The terminal portion is embedded within the cavity filter structure, with the first terminal extending from the electrode pad surface into the filter body, and the second terminal connected to the RF signal connecting portion inside the filter. This nested configuration reduces the overall filter size while maintaining functional separation between connection points.
Solution Approach 2:
The terminal portion is designed with flexible dimensional parameters, including the distance between the first and second terminals, the diameter of the terminal rod, and the depth of embedding into the filter body. These adjustable parameters allow optimization of assembly tolerance while maintaining compact dimensions.
2Volume of moving object
If the RF connector is embedded in the filter body, then the mounting space is minimized, but the electric flow connection and signal stability may be disrupted
Solution Approach 1:
The terminal portion acts as an intermediary element between the electrode pad of the external device and the RF signal connecting portion inside the filter body. The terminal rod provides a continuous conductive path through the dielectric material, ensuring reliable electric flow while allowing the connector to be embedded in the filter structure.
Solution Approach 2:
The electrical connection is achieved through a direct conductive path provided by the terminal portion, replacing more complex mechanical connector systems. This substitution simplifies the mounting structure while maintaining connection reliability through the continuous metallic path through the dielectric material.
3Manufacturing precision
If the terminal portion is designed to allow relative motion, then the assembly tolerance is absorbed, but the contact area may vary causing signal loss
Solution Approach 1:
The terminal portion is designed with flexible dimensions and material properties that allow it to adapt to assembly variations. The terminal rod can be made with appropriate flexibility to accommodate relative motion between the external device and filter body, absorbing assembly tolerance while maintaining stable electrical contact through its continuous conductive structure.
Data Source
AI summary
The present disclosure 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. Therefore, the cavity filter can efficiently absorb assembly tolerance which occurs through assembly design, and prevents disconnection of an electric flow, thereby preventing degradation in performance of an antenna device.