RET Gear Plate Assembly for Synchronized Antenna Phase Shifting

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Solution Overview

Problem

Existing base station antennas face challenges in efficiently adjusting the phase shifters to synchronize the electronic tilt angles of antenna beams, particularly in massive MIMO arrays, leading to space constraints and inefficiencies.

Innovation Solution

A RET assembly with a gear plate and synchronized gear system that adjusts phase shifters in synchronization, using a motor-driven lead screw and gears to translate and rotate wipers, allowing for compact design and efficient tilt angle adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If traditional separate adjustment mechanisms are used for each phase shifter, then individual phase adjustment is possible, but device complexity and space requirements increase

Engineering Contradiction:

Improveindividual phase adjustmentVSAvoidadjustment mechanism complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent combines multiple independent phase shifter adjustment mechanisms into a single synchronized RET assembly. The gear plate with multiple arms and gear teeth integrates the adjustment of multiple phase shifters (e.g., 16 phase shifters) into one unified mechanism driven by a single motor, reducing overall system complexity while maintaining individual adjustability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The RET assembly serves multiple functions simultaneously: it adjusts the phase of multiple RF signals, synchronizes electronic tilt across multiple antenna elements, and provides compact integration of motor, gear plate, and phase shifters. This multi-functionality reduces the need for separate adjustment mechanisms for each phase shifter.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple independent phase shifters are used for massive MIMO arrays, then phase control capability is improved, but space requirements and device size increase

Engineering Contradiction:

Improvephase control capabilityVSAvoidspace requirements

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent implements a nested arrangement where the gear plate with its arms and gear teeth is integrated within the feedboard structure. The phase shifters are positioned to share common support structures and RF transmission paths, allowing multiple phase control units to occupy reduced space through hierarchical integration.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent transitions from a planar or distributed arrangement of phase shifters to a three-dimensional integrated structure. The gear plate extends in the depth direction behind the radiating elements, utilizing the Z-dimension to accommodate the mechanical adjustment mechanism without increasing the frontal area of the antenna assembly.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If synchronized adjustment of multiple phase shifters is implemented, then tilt angle synchronization is improved, but mechanism complexity increases

Engineering Contradiction:

Improvetilt angle synchronizationVSAvoidsynchronization mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The gear plate is divided into multiple arms (e.g., 16 arms for 16 phase shifters), with each arm containing gear teeth that engage with corresponding gears on the feedboard. This segmentation allows independent engagement with each phase shifter while maintaining synchronized motion through the central motor-driven lead screw mechanism.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The gear plate acts as an intermediary mechanism between the single motor/lead screw assembly and the multiple phase shifters. The lead screw converts rotational motion to linear motion of the gear plate, which then translates to synchronized rotation of multiple gears, each controlling a phase shifter. This intermediary structure simplifies the control architecture while ensuring synchronization.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 synchronized phase shifting and tilt angle adjustments in base station antennas, reducing space requirements and enhancing the efficiency of massive MIMO arrays.

Implementation Method 1

a motor coupled to a lead screw that is coupled to the gear plate. The motor and lead screw are configured to drive the gear plate upwardly and downwardly

Methodology Applied

Scientific EffectLead screw mechanism: Screw

Implementation Method 2

A RET assembly with a gear plate and synchronized gear system that adjusts phase shifters in synchronization, using a motor-driven lead screw and gears to translate and rotate wipers

Methodology Applied

Scientific EffectGear mechanism: Gear

Data Source

PatentUS20250219287A1RET assemblies providing synchronized phase shift of phase shifters for base station antennas

Publication Date: 2025.07.03 OUTDOOR WIRELESS NETWORKS LLC

AI summary

RET assemblies suitable for base station antennas are provided that include a gear plate with a plurality of arms that extend in a longitudinally upward direction and a plurality of arms that extend in a longitudinally downward direction. The gear plate is coupled to a motor and lead screw that drive the gear plate, which in turn, rotates gears coupled to the gear plate. The gears rotate wipers of phase shifters in synchronization.