Waveguide Antenna Integrated Thermal Management for Automotive Radar
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Solution Overview
Problem
Modern automotive radar antennas face challenges in heat transfer from integrated circuits to printed circuit boards due to limited heat dissipation through solder balls, leading to potential thermal issues.
Innovation Solution
Incorporating a metallic waveguide with a heat dissipation portion that includes a chamber with a fluid and a wicking structure to absorb heat from the integrated circuit, along with a thermally conductive relationship, to effectively reduce the temperature of the integrated circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If patch antenna elements are supported on a printed circuit board with integrated circuits secured by solder balls, then the antenna configuration achieves desired gain and directivity, but heat transfer from the integrated circuit is limited
Solution Approach 1:
The patent combines the waveguide structure with a heat dissipation portion into a single integrated component. The waveguide serves both its electromagnetic function and acts as a thermal management system through the integrated heat dissipation portion that includes fluid channels and phase change material, thereby simultaneously maintaining antenna performance and reducing integrated circuit temperature.
Solution Approach 2:
The patent introduces a heat dissipation portion with fluid channels and phase change material as an intermediary thermal management system between the integrated circuit and the environment. This intermediary structure facilitates heat transfer from the integrated circuit through the waveguide walls, enabling effective thermal management without compromising the antenna's electromagnetic performance.
2Reliability
If solder balls are used to secure the integrated circuit to the board, then electrical connection is achieved, but heat dissipation capability is insufficient
Solution Approach 1:
The patent merges the waveguide structure with a dedicated heat dissipation portion into one integrated component. The heat dissipation portion includes fluid channels for convective cooling and phase change material for latent heat absorption, creating a multi-mechanism thermal management system that maintains reliable electrical connections while significantly improving heat dissipation efficiency.
Solution Approach 2:
The patent incorporates fluid channels within the heat dissipation portion to enable hydraulic cooling. Fluid circulates through these channels to absorb and remove heat from the integrated circuit, providing an active thermal management solution that complements the passive solder ball electrical connection while dramatically improving heat dissipation capability.
3Temperature
If a heat dissipation portion is integrated into the waveguide, then temperature of the integrated circuit is reduced, but device complexity increases
Solution Approach 1:
The patent eliminates the need for separate heat dissipation components by merging the waveguide structure with an integrated heat dissipation portion. This unified design incorporates fluid channels and phase change material directly within the waveguide, reducing the number of discrete parts and simplifying assembly while maintaining effective thermal management.
Solution Approach 2:
The waveguide structure serves multiple functions simultaneously: it guides electromagnetic waves, provides structural support, and acts as a thermal management system through the integrated heat dissipation portion. This multi-functionality reduces overall device complexity by eliminating the need for separate components for each function.
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 enhances thermal dissipation, maintaining a stable temperature for the integrated circuit and providing a lightweight, low-loss antenna configuration suitable for automotive radar detectors.
Implementation Method 1
The heat dissipation portion is in a thermally conductive relationship with the integrated circuit and configured to reduce a temperature of the integrated circuit
Implementation Method 2
the chamber defines a first volume within the chamber, the fluid is a liquid, and the liquid has a second volume that is less than the first volume
Implementation Method 3
the wicking structure being configured to facilitate circulation of a vaporized portion of the liquid back into the liquid
Implementation Method 4
the wicking structure being configured to facilitate circulation of a vaporized portion of the liquid back into the liquid
Data Source
AI summary
An illustrative example embodiment of an antenna device includes a substrate, a plurality of antenna elements supported on the substrate, an integrated circuit supported on one side of the substrate, and a metallic waveguide antenna situated against the substrate. The metallic waveguide antenna includes a heat dissipation portion in a thermally conductive relationship with the integrated circuit. The heat dissipation portion is configured to reduce a temperature of the integrated circuit.