Foldable Device Antenna Grounding to Mitigate Display Interference
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Solution Overview
Problem
Antennas in foldable and rollable electronic devices experience degraded radiation performance due to being disposed near displays, leading to nulls and performance issues.
Innovation Solution
An antenna structure is designed with a conductive plate on a display's rear surface electrically connected to a ground via a conductive connection member, maintaining radiation performance by mitigating resonance and null areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If an antenna is disposed near a display in a foldable electronic device, then the device structure is compact and foldable, but the radiation performance of the antenna is degraded due to nulls and interference
Solution Approach 1:
A conductive connection member is introduced as an intermediary element between the display and ground. This conductor provides an alternative current path that mitigates the harmful resonance and null effects caused by the display's proximity to the antenna, thereby improving radiation performance while maintaining the compact foldable structure.
Solution Approach 2:
The electrical characteristics of the system are modified by adding the conductive connection member, which changes the impedance and current distribution parameters. This alters the resonant behavior and reduces the formation of nulls in the radiation pattern, enabling better antenna performance in the constrained space.
2Reliability
If a conductive connection member is added to improve antenna performance, then radiation performance is enhanced, but device complexity increases
Solution Approach 1:
The conductive connection member serves multiple functions: it acts as an electrical connector, provides electromagnetic shielding, establishes a ground reference, and mitigates resonance effects. By combining these functions into a single element, the solution improves antenna performance without proportionally increasing device complexity.
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 solution enhances antenna radiation performance by reducing interference from displays, ensuring effective communication across multiple frequency bands while meeting SAR standards and minimizing human exposure.
Implementation Method 1
a conductive plate on a display's rear surface electrically connected to a ground via a conductive connection member
Data Source
AI summary
An electronic device is provided. The electronic device includes a first housing including first side and second sides facing opposite directions and a first lateral member surrounding a first space between the first and second sides, a second housing foldably connected to the first housing by a hinge, and including a third side facing a same direction as the first side in an unfolded state, a fourth side facing an opposite direction to the third side, and a second lateral member surrounding a second space between the third and fourth sides, a first bendable display extending from the first side to at least a portion of the third side, a second display visible through the fourth side and including a conductive plate on a rear surface thereof, an antenna disposed in the second housing, a wireless communication circuit electrically connected to the antenna through a first electrical path at a first point in the second space, and at least one conductive connection member disposed in the second space and connected to the ground. The conductive plate is electrically connected to ground at a second point spaced apart from the first point through the at least one conductive connection member.