Antenna Module Heat-Dissipating Component Width Variation
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Solution Overview
Problem
In antenna modules, the heat-dissipating component can be excited into resonance by the radio-frequency element, causing unintended radiation of electromagnetic waves, which deviates the antenna module's characteristics from desired directivity.
Innovation Solution
The heat-dissipating component is designed with a varying width along its lateral side, concentrating capacitance and electric field at the edges, thereby narrowing the frequency band in which it can act as an antenna and reducing unintended radiation, while ensuring secure fixation to the radio-frequency element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heat-dissipating component is placed in proximity to or in contact with the radio-frequency element, then heat dissipation is improved, but electromagnetic waves are unintentionally radiated causing deviation from desired antenna characteristics
Solution Approach 1:
The heat-dissipating component is designed with non-uniform thickness, creating different local properties: a first region with greater thickness for enhanced heat dissipation and a second region with lesser thickness to minimize electromagnetic radiation. This local quality variation allows simultaneous optimization of heat dissipation and radiation suppression.
Solution Approach 2:
The thickness parameter of the heat-dissipating component is deliberately changed across different regions. By varying the thickness parameter from the first region (greater thickness) to the second region (lesser thickness), the component achieves both effective heat dissipation and reduced electromagnetic resonance effects.
2Ease of manufacture
If the heat-dissipating component has uniform width, then manufacturing is simplified, but fixation to the radio-frequency element is insufficient
Solution Approach 1:
The heat-dissipating component features local quality variation in its thickness distribution. The first region has greater thickness providing strong fixation to the radio-frequency element, while the second region has lesser thickness. This localized differentiation simultaneously ensures secure mounting and maintains manufacturing feasibility.
Solution Approach 2:
Instead of varying width in the planar dimension, the invention utilizes the thickness dimension (vertical dimension) to achieve both fixation strength and radiation suppression. This dimensional approach allows the component to maintain a simple planar shape for easy manufacturing while achieving complex functional requirements through thickness variation.
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 configuration reduces deviation of the antenna module's characteristics from desired specifications by minimizing unintended radiation and enhancing the heat-dissipating component's fixation, thus maintaining desired directivity and performance.
Implementation Method 1
The first heat-dissipating component directs heat from the first radio-frequency element to the outside
Implementation Method 2
the first heat-dissipating component has a first width that differs from a second width, the first width being a width at a first position of the first heat-dissipating component, the second width being a width at a second position of the first heat-dissipating component, the second position being located away from the first position in the direction of the normal. This configuration makes it possible to reduce deviation of the characteristics of the antenna module from desired characteristics
Data Source
AI summary
An antenna module according to an embodiment of the present disclosure includes a dielectric substrate, a first antenna element, a first radio-frequency element, and a first heat-dissipating component. The first antenna element is provided on the dielectric substrate. The first radio-frequency element supplies electric power to the first antenna element. The first heat-dissipating component directs heat from the first radio-frequency element to the outside. The dielectric substrate, the first radio-frequency element, and the first heat-dissipating component are stacked in this order in the Z-axis direction, which is the direction normal to the dielectric substrate. The first heat-dissipating component includes metal. The first heat-dissipating component has a first width at its first position that differs from a second width at its second position located away from the first position in the Z-axis direction.