Segmented Metal Frame Antenna for Full-Screen Wireless Devices
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Solution Overview
Problem
Wireless communication devices with full-screen displays face challenges in accommodating optical modules and other electronic components, which can obstruct the display and require clearance areas for antennas, limiting the design flexibility and efficiency of antenna structures.
Innovation Solution
The antenna structure incorporates a metal frame with strategically placed gaps filled with insulating materials, a matching circuit, and a switching circuit to optimize impedance matching and frequency adjustment, allowing for a complete uninterrupted display while maintaining effective radiation efficiency across multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If optical modules or other electronic components are placed on the display screen, then the display can show content, but the screen is obstructed and the antenna clearance area is compressed
Solution Approach 1:
The metal frame is segmented into multiple parts with gaps between them, allowing the antenna structure to be divided into separate radiation elements. This segmentation enables the antenna to maintain its radiation performance while accommodating display components, as the gaps provide necessary clearance areas for optical modules without compromising the overall antenna functionality.
Solution Approach 2:
The antenna structure utilizes the metal frame's three-dimensional structure, extending radiation portions along the frame's length and width. By distributing antenna elements across different spatial dimensions of the frame, the design achieves full-screen display capability while maintaining adequate antenna clearance areas in specific regions.
2Area of stationary object
If the antenna clearance area is compressed to accommodate full-screen display, then the display area increases, but the antenna radiation efficiency deteriorates
Solution Approach 1:
Different regions of the metal frame are assigned different functions: some areas serve as antenna clearance zones with adequate spacing for radiation, while other areas accommodate display components. The gaps in the metal frame are strategically positioned to provide local clearance areas that protect antenna radiation efficiency while allowing full-screen display elsewhere.
3Area of moving object
If gaps are added to the metal frame for antenna structure, then the antenna clearance area is maintained, but the structural integrity may be compromised
Solution Approach 1:
The metal frame incorporates gaps filled with insulating materials, creating a composite structure that maintains both mechanical strength and electrical isolation for antenna operation. The combination of metal and insulating materials provides structural integrity while ensuring adequate clearance areas for antenna radiation.
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 a full-screen display without compressing the antenna clearance area, ensuring efficient radiation performance across various frequency bands, including LTE-Advanced modes, and supports carrier aggregation with improved radiation efficiency and design flexibility.
Implementation Method 1
The gaps may be filled with insulating materials
Implementation Method 2
maintaining effective radiation efficiency across multiple frequency bands
Data Source
AI summary
An antenna structure able to occupy a very small space in an electronic device includes a metal frame and at least one feed source. The metal frame is metallic, a protruding portion protrudes from a side of the metal frame. The side of the metal frame with the protruding portion defines a first gap and a second gap. The first gap and the second gap divide the metal frame into radiation portions. The at least one feed source is electrically connected to each of the at least two radiation portions and feeds a current to each of the at least two radiation portions.