Gear-Rack Phase Shifting Assembly for Precise Antenna Positioning
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Solution Overview
Problem
Existing transmission structures in antennas suffer from position deviation issues, poor precision in phase control, and increased complexity, weight, and cost, especially when used in multiple-input multiple-output (MIMO) systems.
Innovation Solution
A transmission apparatus comprising a gear with a first stopper and pivot shaft, a rack with a second stopper, and a fixture mechanism that allows precise positioning through meshing and stopping, reducing volume and weight while improving precision and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is used for positioning, then positioning precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces the electronic sensor-based positioning system with a purely mechanical positioning mechanism. The gear and rack are equipped with stoppers that mechanically limit the movement range, providing positioning functionality without requiring sensors or electronic control systems. This mechanical substitution resolves the contradiction by achieving positioning precision through mechanical means while avoiding the complexity and cost of electronic sensors.
2Measurement precision
If a positioning mechanism is added at the transmission structure, then positioning precision is improved, but device complexity and weight increase
Solution Approach 1:
The patent merges the positioning function directly into the existing gear and rack components by adding stoppers to these elements. Rather than adding a separate positioning mechanism, the stoppers are integrated with the gear and rack structures that already exist in the transmission system. This merging approach provides positioning precision while minimizing additional weight, as the stoppers utilize the existing structural framework.
3Manufacturing precision
If conventional transmission structures are used in MIMO antennas, then phase control precision deteriorates, but structure space and weight are reduced
Solution Approach 1:
The patent implements a self-positioning mechanism where the gear and rack automatically return to their initial positions through the stoppers. The stoppers prevent over-rotation and over-travel, ensuring that the transmission components consistently return to the same reference position without requiring external intervention or complex control systems. This self-service capability ensures phase control precision across multiple MIMO antenna elements while maintaining a compact structure.
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 solution enables precise positioning and stability in antenna transmission structures, simplifying the structure and reducing costs while enhancing precision and consistency in phase adjustment, particularly in MIMO systems.
Implementation Method 1
The gear includes a first stopper and a pivot shaft... The rack meshes with the gear in an assembly state... The gear and the rack can stop moving with the help of the cooperation of the first stopper and the second stopper
Data Source
AI summary
A transmission apparatus includes a gear, a rack, and a fixture mechanism. The gear includes a first stopper and a pivot shaft. The first stopper is arranged at at least one end of a gear member extending along a longitudinal axis of the gear. The rack meshes with the gear in an assembly state and includes a second stopper corresponding to the first stopper. The fixture mechanism includes a gear fixing hole and a guidance groove. The gear rotates relative to the fixture mechanism via the pivot shaft. The pivot shaft passes through the gear fixing hole. The rack translates relative to the fixture mechanism through the guidance groove.