Antenna Module Cavity Design for Millimeter Wave Efficiency
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Solution Overview
Problem
The challenge is to design an antenna module that maintains high efficiency while minimizing size, particularly for use in electronic devices employing millimeter wave communication, as larger antenna modules can reduce space efficiency and limit the size of other components like batteries and displays.
Innovation Solution
The antenna module incorporates a layer structure with non-conductive layers, conductive patches, and a feeding line that passes through cavities in the non-conductive layers, allowing for reduced size without compromising efficiency, and includes communication circuitry to supply power to the conductive patches for millimeter wave signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conductive patch size is increased to maintain antenna efficiency, then the antenna efficiency is improved, but the area of the antenna module increases
Solution Approach 1:
The patent changes the geometric parameters of the conductive patch (length, width, rounded corners) and the cavity dimensions to optimize antenna efficiency while maintaining a compact overall module size. By carefully adjusting these parameters, the antenna achieves high efficiency without requiring a larger footprint.
Solution Approach 2:
The patent introduces a cavity dimension (vertical depth) as an additional degree of freedom to control antenna performance. Instead of only increasing the horizontal area of the conductive patch, the design utilizes the vertical dimension through the cavity structure to achieve the desired antenna efficiency in a compact planar footprint.
2Reliability
If the antenna module size is increased to achieve specified impedance, then the impedance control is improved, but the space efficiency of the electronic device decreases
Solution Approach 1:
The patent adjusts multiple geometric parameters including the conductive patch dimensions, cavity size and shape, and substrate thickness to achieve the specified impedance (typically 50 ohms) while keeping the overall module area minimized. This parameter optimization allows proper impedance matching without increasing device footprint.
Solution Approach 2:
The antenna structure is segmented into distinct functional regions: the conductive patch for radiation, the cavity for impedance control and resonance, and the substrate for mechanical support. This segmentation allows each component to be independently optimized for its specific function while contributing to overall compactness.
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 enables smaller antenna modules with maintained or improved efficiency, allowing for additional space in electronic devices for other components and enhanced communication capabilities without increasing module size.
Implementation Method 1
at least one first cavity is formed in at least part of the at least one non-conductive layer through which the feeding line passes
Data Source
AI summary
According to various embodiments of the disclosure, an antenna module and an electronic device including the same are disclosed. The antenna module includes a layer structure that includes a plurality of non-conductive layers, a first layer that is disposed between the plurality of non-conductive layers and that includes at least one first conductive patch, a second layer that is disposed adjacent to the plurality of non-conductive layers in a first direction and that includes a ground, and a feeding line that passes through at least one non-conductive layer located between the first layer and the second layer among the plurality of non-conductive layers and the second layer and that is electrically connected with the at least one first conductive patch, and communication circuitry that is disposed adjacent to the layer structure in the first direction and that supplies electric power to the at least one first conductive patch through the feeding line, and at least one first cavity is formed in at least part of the at least one non-conductive layer through which the feeding line passes. Besides, it may be permissible to prepare various other embodiments speculated through the specification.