Remote Radio Head Mounting Rail for Lever-Assisted RF Coupling
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Solution Overview
Problem
The challenge of attaching and detaching remote radio heads (RRH) to antenna modules on cellular towers is cumbersome due to their size and weight, requiring a safer and more convenient arrangement that minimizes effort and ensures a robust RF connection.
Innovation Solution
A frame and bracket configuration for the RRH allows slidable attachment to the antenna unit with a guide rail and anchor pin, utilizing an installation lever for easy engagement and disengagement, along with spring-loaded connectors to compensate for misalignment and maintain a robust RF connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the RRH is attached close to the antenna module to minimize coaxial cable length, then signal loss is reduced and transmission power is optimized, but the size and weight of the RRH make attachment and detachment cumbersome and unsafe
Solution Approach 1:
The system is divided into modular components: the RRH unit, the antenna module with integrated guide rails, and a separate installation lever. This segmentation allows the RRH to be positioned close to the antenna for optimal signal performance while enabling safe and convenient attachment/detachment through the lever mechanism that engages with anchor pins on the guide rails
Solution Approach 2:
The installation lever acts as an intermediary tool that mediates between the operator and the RRH unit. The lever engages with anchor pins on the guide rails to provide mechanical advantage, making it easier and safer to attach and detach the heavy RRH unit while maintaining its optimal position close to the antenna module
2Reliability
If the RRH is positioned close to the antenna module, then the effective range is optimized, but the installation process becomes more difficult due to limited space and the need for precise alignment
Solution Approach 1:
The guide rails are pre-installed on the antenna module back wall with anchor pins positioned at specific locations. This preliminary arrangement of the mounting infrastructure enables precise alignment of the RRH unit during installation, making the installation process easier while ensuring the RRH is positioned optimally close to the antenna module for maximum effective range
Solution Approach 2:
The guide rails serve as an intermediary structure that facilitates precise alignment between the RRH unit and the antenna module. The rails provide physical guidance and positioning features that simplify the installation process in limited space while ensuring the RRH achieves its optimal position for maximizing effective communication range
3Manufacturing precision
If the connectors are rigidly fixed, then alignment precision is required, but vibration and shock loads can compromise the RF connection integrity
Solution Approach 1:
The connector system transitions from a rigid fixed connection to a dynamic spring-loaded connection. The spring mechanism allows the connectors to move and absorb vibration and shock loads while maintaining continuous contact, ensuring RF connection integrity without requiring extremely precise alignment. The spring force compensates for misalignment and maintains reliable electrical contact under various operating conditions
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
Facilitates safe, efficient, and reliable attachment and detachment of RRHs, ensuring a stable RF connection that withstands vibrations and shocks, while accommodating misalignments and reducing installation effort.
Implementation Method 1
the connectors of the antenna module include a spring mechanism so as to receive the RRH cable connectors in a spring-loaded arrangement
Implementation Method 2
The spring-loaded connectors in the antenna module are preloaded to ensure the integrity of the radio frequency signal path. The spring-loaded connectors have other benefits in that tolerances can be overcome with a connector that has flexibility in axial and radial directions moving up and down. It also maintains a force on the radio connectors to maintain a robust RF connection through vibration and shock loads on the unit.
Data Source
AI summary
A remote radio head assembly attaches a remote radio head to the back wall of an antenna unit. The remote radio head assembly has a radio bracket attached to the top of the radio head having a handle for lifting and carrying the radio head. Radio guide spacers attached to the back side of the remote radio head are for sliding the remote radio head along a mounting rail attachment disposed on the back wall of the antenna unit. The mounting rail has a pivot hook for receiving an installation lever configured to engage with the handle to move the remote radio head in downward and upward directions so as to couple the connector ports of the antenna unit.