Active Antenna Module PCB Stacking for Heat Dissipation
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Solution Overview
Problem
Conventional antenna modules using printed circuit boards are bulky, complex, and costly to modify or replace, with fixed designs that complicate heat dissipation and frequency array implementation.
Innovation Solution
An active antenna module design utilizing two printed circuit boards, where one board contains amplifier circuits and the other contains antenna elements, stacked vertically to reduce space and facilitate heat dissipation, with conductive epoxy attachment and air cavities for improved performance at millimeter-wave frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If active components are mounted on the opposite side of antennas on printed circuit boards, then connectivity is achieved, but heat dissipation complexity and cost increase
Solution Approach 1:
The patent divides the antenna module into separate functional layers: antenna elements on one printed circuit board and active components on another printed circuit board. This segmentation allows independent optimization of each layer, with antennas on the first board and amplifiers/other active components on the second board, eliminating the need for complex through-board heat management while maintaining electrical connectivity through controlled impedance traces and connectors.
Solution Approach 2:
The patent transitions from a planar two-dimensional layout (components on opposite sides of the same board) to a three-dimensional stacked configuration (components on separate boards vertically arranged). This dimensional change allows heat to dissipate more efficiently in the vertical direction and enables better thermal management without compromising electrical performance.
2Ease of manufacture
If conventional fixed design is used during manufacturing, then manufacturing simplicity is maintained, but modification difficulty and replacement cost increase
Solution Approach 1:
The modular layered architecture allows individual components or sub-assemblies to be independently manufactured, tested, and replaced. If a defect is found, only the affected layer or module needs to be reworked rather than the entire assembly, significantly reducing repair complexity and cost while maintaining manufacturing efficiency through standardized processes.
3Stability of the object's composition
If large bulky panels are used in antenna modules, then structural stability is achieved, but size and weight increase
Solution Approach 1:
The patent employs a vertical stacking approach where multiple functional layers are arranged in the vertical dimension rather than spreading them out horizontally. This reduces the overall footprint and volume of the antenna module while maintaining structural integrity through proper mechanical stacking and bonding of the printed circuit boards.
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
This design enhances panel yield, allows for modular and customizable arrays, reduces manufacturing costs, and improves performance by enabling efficient heat dissipation and flexible connection redistribution, making it suitable for high-frequency applications.
Implementation Method 1
The first printed circuit board may be affixed to the second printed circuit board using a conductive epoxy material
Data Source
AI summary
An apparatus comprising a first printed circuit board and a second printed circuit board. The first printed circuit board may comprise a plurality of amplifier circuits, a plurality of inputs and a first interconnection network. The second printed circuit board may comprise a plurality of antenna modules and a second interconnection network. The first interconnection network may be configured to connect each of the inputs to a respective one of the plurality of amplifier circuits, and the plurality of amplifier circuits to the second interconnection network. The second interconnection network may be configured to connect the amplifier circuits to the plurality of antenna modules. The first printed circuit board may be affixed to the second printed circuit board using a conductive epoxy material.