Base Station Antenna Mounting Assembly for Fine Mechanical Tilt
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Solution Overview
Problem
Existing base station antenna mounting systems provide limited mechanical tilt adjustments, typically in integer degree increments, which are insufficient for precise positioning and stability, especially with heavy antennas.
Innovation Solution
A mounting assembly with a rack and pressure member system that allows for fine mechanical tilt adjustments of less than 0.5°, utilizing interconnected teeth and fasteners for secure locking, enabling continuous-like adjustability and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an upper mounting assembly with adjustable effective length is used to provide mechanical tilt adjustment, then the base station antenna can have adjustable mechanical tilt, but the adjustment is limited to discrete integer values which is not fine enough
Solution Approach 1:
The rack is divided into multiple discrete tooth positions, where each tooth represents a fine increment of mechanical tilt adjustment. The pressure member engages with individual teeth to lock the antenna at precise angular positions, transforming a continuous adjustment problem into discrete selectable positions that provide fine control without requiring complex continuous adjustment mechanisms.
Solution Approach 2:
The pressure member acts as an intermediary between the rack and the antenna mounting system. It transfers the mechanical engagement force from the rack teeth to the antenna support structure, enabling precise tilt positioning through simple tooth engagement while maintaining structural stability and reliability.
2Strength
If the base station antenna has large weight, an intermediate mounting assembly is additionally provided between the upper mounting assembly and the lower mounting assembly, which additionally connects the base station antenna to the pole
Solution Approach 1:
The function of mechanical tilt adjustment and structural support for heavy antennas is merged into a single integrated rack-and-pressure-member mechanism. The rack provides both the adjustment functionality and the structural framework, while the pressure member simultaneously provides locking and support, eliminating the need for separate intermediate mounting assemblies and reducing overall system complexity.
3Adaptability or versatility
If the effective length of the upper mounting assembly is discretely adjusted, then the base station antenna can have a limited number of selectable mechanical tilts, but this does not meet the expectation of continuous-like adjustability
Solution Approach 1:
The rack is segmented into numerous closely-spaced teeth, where each tooth represents a small angular increment. This segmentation creates the appearance of continuous adjustability while maintaining mechanical discrete positioning, allowing the antenna to be tilted to virtually any angle within the adjustment range with precision controlled by the tooth pitch.
Data Source
AI summary
The present application relates to a mounting assembly for a base station antenna, where the mounting assembly is configured to mount a base station antenna (1), wherein the mounting assembly comprises: a connecting arm (10) provided with a rack (11) having first teeth successive to each other; and a pressure member (12) having at least one second tooth capable of being pressed against the rack such that the second tooth meshes with the rack, wherein a position of the pressure member on the rack when the second tooth meshes with the rack is configured to define a mechanical tilt angle of the base station antenna, wherein the pressure member is releasable from the rack such that the pressure member is displaceable along the rack. The present application also relates to a base station antenna system that includes a base station antenna and the mounting assembly. The mounting assembly enables the mechanical tilt of the base station antenna to be set in a fine division.