Wireless Module Heat Dissipation via Conductive Base Plate

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Solution Overview

Problem

Existing wireless modules face challenges in effectively dissipating heat generated by heat-generating components, particularly in high-frequency applications where the antenna body's dimensions and shape are constrained by the frequency of the electromagnetic wave, leading to insufficient heat radiation characteristics.

Innovation Solution

A wireless module design featuring a substrate with ground patterns, a heat-generating component connected to the ground patterns, a pattern antenna, and a conductive base plate that is electrically connected to the ground patterns and positioned opposite the pattern antenna, allowing for efficient heat dissipation through a base plate with dimensions and shape not limited by the electromagnetic wave frequency, using a conductive fastening member to connect the base plate to the ground patterns and protrusions for enhanced contact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the antenna body dimensions and shape are constrained by electromagnetic wave frequency (as in conventional PIFA antennas), then the antenna can resonate at the desired frequency, but heat radiation characteristics become insufficient

Engineering Contradiction:

Improveantenna radiation performanceVSAvoidheat radiation characteristics

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The invention separates the antenna function from the heat radiation function. The PIFA antenna maintains its frequency-constrained dimensions for resonance, while a separate heat radiation plate (larger area) is introduced specifically for heat dissipation. This segmentation allows each component to be optimized for its specific function without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The ground plane is designed to serve dual functions: as part of the PIFA antenna structure for radiation and as a heat radiation plate for thermal management. By making the ground plane larger than the antenna body and connecting it to the heat generating component, it simultaneously provides electromagnetic radiation functionality and heat dissipation functionality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Temperature

If the ground plane area is increased to improve heat radiation, then heat dissipation improves, but the antenna radiation characteristics may be affected

Engineering Contradiction:

Improveheat radiation characteristicsVSAvoidantenna radiation performance

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The invention creates different functional zones within the ground structure. The region under the antenna body maintains specific electrical properties for radiation, while the extended regions of the ground plane are optimized for heat conduction and radiation. This local differentiation allows the same physical structure to serve multiple purposes with different performance requirements.

Inventive Principle:

Principle #3Local quality

3Temperature

If a separate heat radiation plate is added to improve heat dissipation, then heat radiation characteristics improve, but device complexity increases

Engineering Contradiction:

Improveheat radiation characteristicsVSAvoidstructure complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The invention merges the heat radiation plate with the existing ground plane structure of the PIFA antenna. By making the ground plane extend beyond the antenna body and directly connecting it to the heat generating component, the design eliminates the need for separate heat sinks or thermal management components, achieving heat dissipation enhancement without increasing overall device complexity.

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

This design enhances heat radiation characteristics by allowing the base plate to be designed for optimal heat dissipation, independent of the electromagnetic wave frequency, providing a high degree of freedom in positioning the heat-generating component and improving the antenna's radiation performance.

Implementation Method 1

heat generated in the power amplifier that is a heat generating component is conducted to the antenna body via the attachment foot part, and is thereby radiated

Methodology Applied

Scientific EffectHeat conduction: Conduction (thermal)

Implementation Method 2

heat generated in the power amplifier that is a heat generating component is conducted to the antenna body via the attachment foot part, and is thereby radiated

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Implementation Method 3

the base plate is connected to the second ground pattern by a conductive fastening member

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentEP3389136B1Wireless module and image display device

Publication Date: 2021.04.14 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

Figure 1A~1B
Figure 2
Figure 3

AI summary

Provided is a wireless module including an antenna and a heat generating component, the wireless module being capable of enhancing heat radiation characteristics. The wireless module includes: a substrate; a ground pattern formed on the substrate; a heat generating component mounted on the substrate and connected to the ground pattern; a pattern antenna including a grounding part connected to the ground pattern and a power feeding part fed with power from the heat generating component, the pattern antenna being formed on the substrate; and a conductive base plate electrically connected to the ground pattern and disposed opposite to the pattern antenna.