Removable Active Antenna Module Coupling for Heat and Interference

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Solution Overview

Problem

Existing base station antennas face challenges in managing heat dissipation and interference from active antenna modules, particularly in multi-band and beamforming arrays, which can lead to overheating and reduced performance.

Innovation Solution

A base station antenna design incorporating a passive antenna assembly with a reflector and coupling brackets that electrically couple to an active antenna module, utilizing RF chokes and capacitive/galvanic coupling to manage heat and interference, allowing interchangeable active antenna modules with different configurations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If active antenna modules are integrated into base station antennas, then beamforming capability and adaptability are improved, but heat dissipation becomes more difficult and temperature increases

Engineering Contradiction:

Improvebeamforming capabilityVSAvoidheat dissipation

Core Design Contradiction:

Adaptability or versatilityVSTemperature

Solution Approach 1:

The patent extracts the active antenna module from the base station antenna housing, creating a separate removable component. This extraction allows the active module to be independently managed for thermal purposes while maintaining its beamforming functionality when installed. The active antenna module can be removed or replaced without affecting the passive antenna structure, enabling separate thermal management strategies.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent segments the base station antenna system into distinct active and passive components. The active antenna module containing heat-generating electronics is separated from the passive radiating elements and housing. This segmentation allows different thermal management approaches for each segment, with the passive portion serving as a thermal buffer and the active portion being replaceable for maintenance.

Inventive Principle:

Principle #1Segmentation

2Reliability

If active antenna modules with radios are integrated, then interference management becomes more complex, but signal control and beamforming performance are improved

Engineering Contradiction:

Improvesignal controlVSAvoidinterference management

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a coupling bracket as an intermediary component between the active antenna module and the passive antenna housing. This coupling bracket serves as a mediator that provides both mechanical attachment and electrical coupling while managing interference. The bracket includes features like RF chokes or filtering elements that actively manage electromagnetic interference between the active and passive portions.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If interchangeable active antenna modules are used, then adaptability for different service providers is improved, but manufacturing and assembly complexity increase

Engineering Contradiction:

Improveservice provider compatibilityVSAvoidassembly complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent designs the coupling bracket and mounting interface to be universal, accommodating different active antenna module configurations from various service providers. The standardized interface allows multiple module types to be installed in the same housing without requiring custom assembly procedures. This universal design simplifies manufacturing by using common components across different module variants.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Temperature

If heat sinks are added to active antenna modules, then heat dissipation is improved, but the overall device size and complexity increase

Engineering Contradiction:

Improveheat dissipationVSAvoiddevice size

Core Design Contradiction:

TemperatureVSVolume of moving object

Solution Approach 1:

The patent merges the heat sink function with the existing coupling bracket structure. Instead of adding separate heat dissipation components, the coupling bracket itself is designed to conduct heat away from the active antenna module to the passive housing. This integration eliminates the need for additional heat sink components, maintaining a compact form factor while providing effective thermal management.

Inventive Principle:

Principle #5Merging (Combining)

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 design effectively manages heat dissipation and reduces interference, enhancing antenna performance and flexibility by enabling interchangeable modules for different cellular service providers, while maintaining consistent operation across various frequency bands.

Implementation Method 1

The reflector and the active antenna module are capacitively coupled together

Methodology Applied

Scientific EffectCapacitive coupling: Capacitance

Implementation Method 2

The reflector and the active antenna module are galvanically coupled together

Methodology Applied

Scientific EffectGalvanic coupling: Conduction (electrical)

Implementation Method 3

utilizing RF chokes and capacitive/galvanic coupling to manage heat and interference

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20260039028A1Base station antennas having an active antenna module(s) and related devices and methods

Publication Date: 2026.02.05 OUTDOOR WIRELESS NETWORKS LLC

AI summary

Base station antennas include an externally accessible active antenna module releasably coupled to a rear of the housing. The base station antenna housing has a passive antenna assembly that cooperates with the active antenna module.