Stepped Antenna Side Member Layout for Compact Device Radiation
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Solution Overview
Problem
The degradation of antenna radiation performance in electronic devices due to the proximity of the antenna to conductive structures within the device's internal space, which affects both radiation efficiency and device rigidity.
Innovation Solution
An electronic device design that incorporates a side member with a conductive part and a non-conductive part, a frame member made of ceramic material, and conductive members with stepped portions to create sufficient separation distance from conductive structures, thereby enhancing antenna radiation performance and device rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna is disposed adjacent to conductive structures (e.g., display) in the internal space of the electronic device, then the device can achieve compact arrangement and reduced size, but the radiation performance of the antenna is degraded
Solution Approach 1:
A non-conductive part is introduced as an intermediary component between the antenna and the conductive structure (display). This non-conductive part acts as a mediator that physically separates the antenna from the conductive structure, preventing harmful electromagnetic interference while maintaining the compact device arrangement. The non-conductive material blocks the adverse interaction between the antenna and conductive structures, thus preserving radiation performance without increasing overall device size.
2Strength
If metal material is used for the side member to reinforce rigidity and/or implement antenna function, then the structural strength and antenna function are improved, but the production cost increases and design constraints arise
Solution Approach 1:
The side member is segmented into two distinct parts: a conductive part (metal material) and a non-conductive part. The conductive part is specifically positioned to provide structural reinforcement and serve as the antenna element, while the non-conductive part is used for bonding to the ceramic frame member. This segmentation allows the metal material to be used only where necessary for strength and antenna function, reducing overall metal consumption and production cost while maintaining the required rigidity and antenna performance.
3Ease of manufacture
If the frame member is bonded to the side member through injection molding that molds polymer material and another injection-molded material, then the ceramic frame member can be bonded to the metallic portion, but the antenna may be disposed between the polymer material and the frame member via the injection-molded material
Solution Approach 1:
The side member is designed with different local qualities: the conductive part is positioned and shaped such that when the non-conductive part is injection-molded, the antenna is naturally positioned away from the conductive structure. The local geometry and material properties of the conductive part create a configuration where the antenna maintains sufficient separation from conductive structures during the injection molding process, thus preventing radiation performance degradation while enabling effective bonding of the ceramic frame member.
Data Source
AI summary
According to an embodiment, an electronic device may include a side member including a conductive part and a first non-conductive part, a frame member disposed on at least a portion of the side member to be at least partially visible from an exterior, a second non-conductive part disposed between the frame member and the first non-conductive part, at least one conductive member disposed between the second non-conductive part and the first non-conductive part, at least one conductive structure disposed near the conductive member in an internal space of the electronic device, and a wireless communication circuit disposed in the internal space and configured to transmit or receive via the at least one conductive member. The conductive member may include a stepped portion so that at least a portion of the conductive member may be disposed in a direction away from the conductive structure.