Antenna Design for Electronic Devices with Metal Casings
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Solution Overview
Problem
Metal casings in electronic devices, such as notebook computers, interfere with antenna radiation, narrowing bandwidth and deteriorating antenna performance due to their shielding effect.
Innovation Solution
An antenna design comprising separate components for high and low frequency signals, which are coupled through specific configurations to form independent frequency bands, eliminating the need for an antenna switch or tuner, and allowing for simple, cost-effective manufacturing and calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If metal casing is used for electronic device, then appearance and texture are improved, but antenna bandwidth is narrowed due to shielding effect
Solution Approach 1:
The antenna system is divided into separate high-frequency and low-frequency antenna components, each with dedicated feed structures. This segmentation allows independent optimization of each frequency band, enabling the antenna to maintain broad bandwidth coverage despite the presence of metal casing that causes shielding effects at different frequencies.
Solution Approach 2:
Feeder structures are introduced as intermediary elements to couple the signal sources to the respective antenna elements. The feeders act as mediators that can be independently tuned and positioned to overcome the shielding effects of the metal casing, ensuring proper impedance matching and signal transmission for both high and low frequency bands.
2Adaptability or versatility
If antenna switch or tuner is added to improve bandwidth, then antenna performance is improved, but device complexity and cost increase
Solution Approach 1:
The antenna system achieves multi-functionality by integrating both high-frequency and low-frequency antenna elements into a single unified structure. This universal design allows the antenna to operate across multiple frequency bands without requiring separate antenna switches or tuners, thereby maintaining broad bandwidth while avoiding additional complexity.
Solution Approach 2:
The high-frequency and low-frequency antenna components are merged into a single integrated antenna system with shared mounting and feeding structures. This combination eliminates the need for separate control mechanisms like antenna switches or tuners, reducing overall device complexity while maintaining the bandwidth advantages of having multiple frequency capabilities.
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 antenna design increases bandwidth, meets performance requirements, and simplifies the structure and calibration process, while maintaining a compact size within the metal casing.
Implementation Method 1
The first component is coupling the high frequency signal to the third component
Implementation Method 2
The second component is coupling the low frequency signal to the fourth component
Implementation Method 3
A superposition of the two frequency bands may be the antenna bandwidth covering the entire frequency band
Data Source
AI summary
Embodiments of the present disclosure provide an electronic device and an antenna. The antenna for includes a first component configured for high frequency feed; a second component configured for low frequency feed; a third component configured for high frequency signal transmission; and a fourth component configured for low frequency signal transmission. The first component is coupling a high frequency signal to the third component, and the second component is coupling a low frequency signal to the fourth component.