Vapor Chamber Amplifier Module Thermal Management
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Solution Overview
Problem
Conventional heat dissipation methods for RF power amplifiers in base stations are inefficient, leading to high temperatures and potential device failure, requiring devices to be spaced far apart to prevent overheating, which increases size, weight, and cost.
Innovation Solution
A vapor chamber with a sealed cavity partially filled with a coolant is used, providing superior heat dissipation by evaporating and condensing the coolant to distribute heat uniformly, allowing for closer placement of amplifier devices and reducing thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heat dissipation methods (finned heat sinks) are used for RF power amplifiers, then heat can be dissipated from the devices, but the devices must be spaced far apart which increases size, weight, and cost
Solution Approach 1:
The patent merges multiple RF power amplifier devices onto a single PCB substrate, integrating them into a compact module. The vapor chamber consolidates heat dissipation for multiple devices into a single unified thermal management system, eliminating the need for separate heat sinks and large spacing between individual devices.
Solution Approach 2:
The invention employs a vapor chamber that utilizes phase transitions of coolant (liquid to vapor and back to liquid) to transfer heat efficiently. The coolant absorbs heat from the amplifier devices through evaporation and releases it through condensation, providing superior heat dissipation in a compact form factor.
2Volume of moving object
If RF power amplifiers are placed closer together to reduce size, then space is saved, but heat accumulation increases causing potential device failure
Solution Approach 1:
The vapor chamber provides localized thermal management directly at each amplifier device location through its contact surface. The chamber maintains uniform temperature distribution across its bottom surface, ensuring each device operates within safe thermal conditions even when closely spaced, thereby preserving reliability while reducing overall module size.
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 vapor chamber effectively reduces the temperature of RF power amplifier devices, extends their operational life, and allows for more compact and cost-effective designs by improving heat dissipation and enabling closer device placement.
Implementation Method 1
providing superior heat dissipation by evaporating and condensing the coolant to distribute heat uniformly
Implementation Method 2
providing superior heat dissipation by evaporating and condensing the coolant to distribute heat uniformly
Implementation Method 3
The top of the vapor chamber has at least one depression formed therein. The depression is adapted to receive and thermo-conductively connect to at least part of a bottom of a corresponding packaged semiconductor device
Data Source
AI summary
In one embodiment, an electronic system includes a printed circuit board, one or more packaged semiconductor devices, and a vapor chamber having a top and a bottom and enclosing a sealed cavity that is partially filled with a coolant. The vapor chamber comprises a thermo-conductive and electro-conductive material. The top of the vapor chamber has one or more depressions formed therein, each depression receiving and thermo-conductively connected to at least part of a bottom of a corresponding packaged semiconductor device, which is mounted through a corresponding aperture in the PCB. A heat sink may be thermo-conductively attached to the bottom of the vapor chamber.