Millimeter Wave Antenna Placement in Electronic Chassis
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Solution Overview
Problem
The design of electronic apparatuses, such as laptops, faces limitations in antenna transmission/reception characteristics due to chassis structure constraints, which reduces the freedom in designing these devices.
Innovation Solution
Incorporating a chassis with a conductive reflection member and radio wave transmission parts that position antennas in the outer peripheral edge area, allowing the antennas to be sandwiched between the reflection member and the side face, enhancing transmission/reception characteristics while maintaining design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna placement is adjusted to improve transmission/reception characteristics, then the antenna performance is improved, but the chassis structure is limited
Solution Approach 1:
The patent utilizes the thickness dimension of the chassis by providing a reflection member that extends from the upper plate toward the lower plate. This vertical arrangement creates a three-dimensional antenna configuration where the antenna is positioned between the upper plate and the reflection member, effectively using the Z-axis (thickness direction) to improve radiation characteristics without compromising planar design freedom.
Solution Approach 2:
The reflection member acts as an intermediary element between the antenna and the chassis structure. By introducing this conductive component with a reflection surface facing the antenna, the patent mediates the interaction between the antenna and chassis, improving transmission/reception characteristics while maintaining design flexibility through adjustable positioning.
2Reliability
If the antenna is placed in the outer peripheral edge area facing the upper plate, then transmission/reception characteristics are improved, but the chassis structure becomes more complex
Solution Approach 1:
The upper plate serves multiple functions: it acts as a structural component of the chassis, provides a mounting surface for the reflection member, and functions as a radio wave transmission part. This multi-functionality reduces overall device complexity while achieving improved antenna performance through the integrated design.
Solution Approach 2:
The patent merges the reflection member with either the upper plate or lower plate through conductive contact, reducing the number of separate components. This integration simplifies the chassis structure while maintaining the reflective function necessary for improved antenna characteristics.
3Reliability
If a conductive reflection member is added to improve antenna performance, then transmission/reception characteristics are improved, but the device complexity increases
Solution Approach 1:
The reflection member is merged with the upper plate or lower plate through conductive contact, reducing the number of separate components. This integration simplifies the chassis structure while maintaining the reflective function necessary for improved antenna characteristics.
Solution Approach 2:
The upper plate serves multiple functions: it acts as a structural component of the chassis, provides a mounting surface for the reflection member, and functions as a radio wave transmission part. This multi-functionality reduces overall device complexity while achieving improved antenna performance through the integrated design.
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 improves antenna directivity and transmission/reception performance while allowing for thinner designs and reduced electromagnetic noise, thereby increasing the degree of freedom in device design.
Implementation Method 1
a conductive reflection member provided inside the chassis and having a main part with a reflection surface reflecting the radio waves in the millimeter wave band
Implementation Method 2
at least a partial region of the upper plate be a radio wave transmission part which transmits the radio waves
Implementation Method 3
the reflection member be in contact with at least either one of the upper plate and the lower plate in a heat transferable manner
Data Source
AI summary
An electronic apparatus includes: a chassis composed at least of an upper plate, a lower plate, and a side face; at least one plate-like antenna having a radio wave transmission/reception part which deals with radio waves in a millimeter wave band and forms one surface of the antenna; and a conductive reflection member having a main part with a reflection surface reflecting the radio waves in the millimeter wave band. The antenna is placed in an outer peripheral edge area including an outer peripheral edge of the upper plate in plan view in such a manner that the radio wave transmission/reception part faces the upper plate. The reflection member is so placed that the antenna is sandwiched between the reflection member and the side face in plan view. At least the side face transmits the radio waves. The reflection surface is directed toward the antenna.