Antenna Gearbox Layout for Single-Motor MIMO Phase Control
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Solution Overview
Problem
Conventional multiple-input multiple-output (MIMO) mobile communication antennas require dual-drive motors for phase adjustment, leading to complex and costly layouts, particularly for controlling the upper and lower antenna arrays.
Innovation Solution
An antenna gearbox transmission mechanism using a single drive motor to control phase adjustments on both antenna arrays through a transmission system with interconnected gears, allowing independent control of phase shifters via a shared drive shaft and differential gear engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If dual-drive motors are used for phase adjustment on upper and lower antenna arrays, then independent phase control of both arrays is achieved, but device complexity and cost increase
Solution Approach 1:
The patent combines two separate drive motors into a single drive motor that controls both the upper and lower antenna arrays through a shared drive shaft. The first and second driving gears are both connected to the same drive shaft, allowing one motor to simultaneously drive both transmission structures and achieve independent phase control of both arrays.
Solution Approach 2:
The patent segments the transmission system into two independent transmission structures (first transmission structure with first driving gear and first driven gear set, second transmission structure with second driving gear and second driven gear) that share a common drive shaft. This segmentation allows independent control of each antenna array while using a single motor.
2Ease of operation
If dual-drive motors are used for phase adjustment, then phase adjustment control is achieved, but manufacturing cost increases
Solution Approach 1:
The patent merges two separate drive motors into one shared drive motor that controls both antenna arrays. This reduction from two motors to one directly lowers manufacturing costs while maintaining the capability to independently adjust the phase of both upper and lower arrays through the segmented transmission structures.
3Device complexity
If a single drive motor is used to control both antenna arrays, then device complexity and cost are reduced, but control precision may be compromised
Solution Approach 1:
The patent segments the transmission system into two independent transmission structures with separate driving gears and driven gear sets for each antenna array. Although shared by a single drive shaft, each array has its own dedicated gear train, ensuring that phase adjustment precision for each array is maintained independently without interference from the other array.
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
Simplifies the layout and reduces costs by enabling independent phase adjustment of both antenna arrays with a single motor, while maintaining effective control over phase adjustment amplitudes.
Implementation Method 1
The first driving gear meshes with the first driven gear set
Implementation Method 2
the second driving gear meshes with or separates from the second driven gear
Data Source
AI summary
This application provides an antenna gearbox transmission mechanism and an antenna. The antenna gearbox transmission mechanism includes a drive shaft, a first transmission structure, and a second transmission structure. The first transmission structure includes a first driving gear and a first driven gear set, the first driven gear set includes at least one first driven gear, the second transmission structure includes a second driving gear and a second driven gear, and both are in a transmission connection to the drive shaft. The first driven gear set is in a transmission connection to a first antenna array phase shifter, and the second driven gear is in a transmission connection to a second antenna array phase shifter. The first driving gear meshes with the first driven gear set, and when the second driving gear moves, the second driving gear meshes with or separates from the second driven gear.