Multi-Device Control Unit for RET Antenna Actuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional remote electrical tilt (RET) antennas for cellular base stations are costly due to redundant electronic components and mechanical constraints on phase shifter drive shaft locations, leading to increased complexity and development time for new antenna models.
Innovation Solution
A multi-device control unit is introduced that can be inserted into and removed from the antenna, allowing a single controller to manage multiple electro-mechanical actuators, reducing the number of electronic components and eliminating mechanical linkages, thereby simplifying the design and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate RET actuators are used to control multiple electro-mechanical actuators, then each actuator can be independently controlled, but the number of electronic components increases and cost increases
Solution Approach 1:
The patent combines multiple separate RET actuators into a single integrated multi-device control unit that can control multiple electro-mechanical actuators. This merging eliminates redundant electronic components while maintaining the ability to independently control each actuator, directly resolving the contradiction between control capability and device complexity
Solution Approach 2:
The control unit is designed with universal functionality to control multiple different types of electro-mechanical actuators through a single interface. This multi-functional design allows one control unit to replace multiple dedicated actuators, reducing component count while preserving full control capability across all antenna beams
2Adaptability or versatility
If separate RET actuators are used for each frequency band, then each actuator can be optimized for its specific band, but the antenna requires multiple actuators increasing cost and complexity
Solution Approach 1:
The control unit implements universal control capability across multiple frequency bands through software configuration rather than hardware differentiation. A single control unit can be programmed to control electro-mechanical actuators for different frequency bands (e.g., 700MHz, 2.1GHz, 2.6GHz), eliminating the need for separate optimized actuators for each band while maintaining full adaptability
3Adaptability or versatility
If removable RET actuators are used, then the antenna can be reconfigured for different applications, but the phase shifter drive shaft locations are mechanically constrained
Solution Approach 1:
The patent replaces the mechanical coupling system with an electrical control system. Instead of requiring physical mechanical linkages between removable actuators and phase shifters, the system uses electrical signals to control electro-mechanical actuators that are permanently mounted inside the antenna. This substitution eliminates mechanical constraints on drive shaft locations while maintaining full reconfigurability through software
Solution Approach 2:
The control functionality is segmented into a separate removable control unit that interfaces with permanently mounted electro-mechanical actuators. This segmentation allows the control logic to be reconfigured for different applications while the mechanical actuator positions remain fixed, separating mechanical constraints from control flexibility
Data Source
AI summary
RET antenna with a modular switching unit and a multi-device control unit con figured to be inserted into and removed from a receptacle in the antenna. The multi-device control unit works together with motors and position sensors located inside the antenna to allow a single controller located in the multi-device control unit to control multiple embedded electro-mechanical actuators, such as phase shifter control motors. The multi-device control unit includes lightning protection circuits, communications circuits, a motor controller, power control circuits and a motor position sensing circuit inside a small housing. These components are shared between all motors inside the antenna through the modular switching unit, which allows a single set of components within the multi-device control unit to replace redundant components deployed in prior RET antennas.