Antenna Module With Feed Coupling Stub and Breaking Seam
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Solution Overview
Problem
The metal side frame in electronic devices reduces antenna clearance, making it difficult to design effective antenna structures, and existing solutions that cut the metal frame to form separate conductive frames compromise the device's appearance and robustness.
Innovation Solution
An antenna module with a metal side frame featuring a breaking seam and a feed coupling stub, where the stub is spaced from the frame and connected to a middle frame, allowing for parallel arrangement between the display module and main board, and a slot is opened between the frame and display module to radiate electromagnetic waves without cutting the frame, enabling efficient GPS and WIFI frequency band excitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal side frame is used to provide structural strength and metallic appearance, then the device has increased robustness and aesthetic appeal, but the antenna clearance is greatly reduced making antenna design difficult
Solution Approach 1:
The metal side frame is segmented by introducing a breaking seam that divides the frame into separate conductive sections. This segmentation creates electromagnetic isolation zones that provide effective antenna clearance without physically removing metal material, thus maintaining structural strength while enabling antenna functionality.
Solution Approach 2:
A non-conductive material is introduced as an intermediary substance to fill the breaking seam in the metal side frame. This intermediary material provides electrical isolation between conductive sections, creating effective antenna clearance while maintaining the continuous metallic appearance and structural integrity of the frame.
2Ease of operation
If the metal side frame is cut off at antenna-related positions to reserve clearance for the antenna, then the antenna can radiate signals, but the device's appearance and robustness are compromised
Solution Approach 1:
A non-conductive filling material is used as an intermediary to fill the breaking seam, providing electrical isolation for antenna clearance while being invisible from the outside, thus maintaining the continuous metallic appearance of the side frame.
Solution Approach 2:
The breaking seam is designed as a thin, narrow gap that can be effectively sealed with thin non-conductive films or coatings, maintaining the visual continuity of the metal frame while providing sufficient electromagnetic isolation for antenna operation.
3Power
If the metal side frame is cut with several gaps to form separate conductive frames for antenna excitation, then resonant signals can be radiated, but the device's appearance and robustness are compromised
Solution Approach 1:
The metal side frame is segmented into separate conductive sections through the breaking seam, creating distinct electromagnetic zones that enable resonant signal radiation while maintaining the frame's continuous physical structure and robustness.
Solution Approach 2:
Non-conductive filling material serves as an intermediary that provides electrical isolation between conductive sections, enabling resonant signal radiation without creating visible gaps or compromising the structural robustness of the metal frame.
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 solution allows for improved antenna performance without compromising the device's appearance or robustness, as the slot can be sealed without affecting the external look, enhancing the aesthetic and functional integrity of the electronic device.
Implementation Method 1
The feed coupling stub and the middle frame are arranged in parallel between the display module and the main board... a feed signal may excite resonance of GPS frequency band by coupling the first coupling stub and a part of the metal side frame between the second grounding point and the breaking seam
Implementation Method 2
a slot is opened between the inner side of the metal side frame and a side that is on the display module and substantially parallel to the long side of the feed coupling stub
Data Source
Figure 1~2
Figure 3~4A
Figure 4B~5
AI summary
An antenna module and electronic device are provided. The antenna module includes a metal side frame and feed coupling stub with a long side spaced from an inner side of the metal side frame. The feed coupling stub and a middle frame are arranged in parallel between a display module and main board. First end of the feed coupling stub is electrically connected with a grounding part of the main board to form first grounding point. The feed coupling stub is electrically connected with a radiofrequency module of the main board through a contact point to form a feed point. A middle frame connecting part, adjacent to second end of the feed coupling stub, forms second grounding point. A slot is opened between the inner side and a side of the display module substantially paralleled to the long side of the feed coupling stub.