Antenna Transmission Rack Drive for Compact Precise Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing base station antennas face issues with high component count, large spatial requirements, and poor assembly precision due to the use of screws and nuts, leading to increased costs and difficulty in precise control.
Innovation Solution
An antenna transmission device utilizing a motor-driven mechanism with a rack and pinion system, incorporating a shell, output units, and input units, which reduces component count, minimizes space, and enhances precision through a spiral transmission member and sliding rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single antenna is used for both uplink and downlink in TDD systems, then device complexity is reduced, but interference from other cells cannot be effectively suppressed
Solution Approach 1:
The single antenna is segmented into two independent antenna elements (first antenna element and second antenna element), each dedicated to specific transmission directions. The first antenna element transmits downlink signals while the second antenna element transmits uplink signals, enabling independent beamforming control for each direction and effective interference suppression without increasing overall device complexity.
2Object-affected harmful factors
If separate antennas are used for uplink and downlink to suppress interference, then interference suppression capability is improved, but device complexity increases
Solution Approach 1:
Two antenna elements that would traditionally be separate are merged into a single antenna structure. The first and second antenna elements are integrated in the same antenna device, sharing common support structures and control circuits, thereby achieving interference suppression through spatial separation while minimizing the increase in device complexity.
3Object-affected harmful factors
If beamforming is applied to suppress interference, then interference suppression is improved, but signal leakage to other cells occurs
Solution Approach 1:
Different beamforming characteristics are applied to different antenna elements. The first antenna element uses a first beamforming weight vector optimized for downlink transmission, while the second antenna element uses a second beamforming weight vector optimized for uplink transmission. This localized optimization ensures that each element's beamforming pattern directs energy precisely where needed, suppressing interference to other cells while minimizing signal leakage.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An antenna transmission device includes a shell, an output unit, and an input unit. The output unit is slidingly arranged at the shell and includes a rack. The input unit is at least partially arranged in the shell, meshes with the rack of the output unit, and is configured to drive the output unit to move linearly.