Lateral Antenna Structure With Current-Controlled Housing Connection
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Solution Overview
Problem
Electronic devices with metal side surfaces face challenges in antenna radiation performance due to current leakage and oxide film separation, which deteriorate signal transmission and durability.
Innovation Solution
A conductive side surface member separated from the housing, equipped with a power feeder, printed circuit board, and a conductive connection member with a current control element, controls current flow and prevents oxide film separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the side surface member is physically connected to the housing to enable electrical connection, then electrical connectivity is achieved, but current leakage occurs and antenna radiation performance deteriorates
Solution Approach 1:
The side surface member is divided into two separate parts: one portion is physically connected to the housing for electrical connection, while another portion is spaced apart from the housing to prevent current leakage. This segmentation allows the structure to simultaneously achieve electrical connectivity and prevent harmful current flow.
Solution Approach 2:
A conductive connection member is introduced as an intermediary element between the side surface member and the housing. This connection member includes a current control element that regulates current flow, allowing electrical connectivity while preventing excessive current leakage that would otherwise occur through direct physical contact.
2Object-generated harmful factors
If the side surface member is separated from the housing to prevent current leakage, then antenna radiation performance is maintained, but electrical connection becomes limited
Solution Approach 1:
The side surface member is segmented into portions with different spatial relationships to the housing: some portions are spaced apart to prevent current leakage and maintain antenna performance, while other portions are connected through the conductive connection member to ensure electrical connectivity for signal transmission.
Solution Approach 2:
The conductive connection member serves multiple functions simultaneously: it provides electrical connection between the side surface member and housing, controls current flow through the current control element, and enables signal transmission while preventing harmful current leakage. This multi-functionality resolves the contradiction between separation and connection.
3Reliability
If current flows from the housing to the side surface member, then electrical connection is established, but hydrogen gas is generated and oxide film separates
Solution Approach 1:
The current control element within the conductive connection member acts as an intermediary that regulates and controls the current flowing from the housing to the side surface member. By controlling the current flow, it prevents the generation of hydrogen gas and subsequent oxide film separation that would occur with uncontrolled current flow, while still maintaining necessary electrical connection.
Solution Approach 2:
The current control element changes the electrical parameters (current flow characteristics) between the housing and side surface member. By adjusting and controlling the current parameters, it prevents conditions that lead to hydrogen gas generation and oxide film separation, while maintaining adequate electrical connection for antenna operation.
Data Source
AI summary
According to an embodiment of the disclosure, an electronic device may include a housing at least a portion of which is made of a conductive material, a side surface member which surrounds a side surface of the housing while being separated from the side surface of the housing, wherein the side surface member is made of a conductive material and includes a power feeder, a printed circuit board on which a communication module is disposed and which is disposed in the housing, a circuit member configured to electrically connect the power feeder of the side surface member to the printed circuit board such that a communication signal generated by the communication module is transmitted to the side surface member, and a conductive connection member configured to electrically connect the side surface member to the housing, wherein the conductive connection member includes a current control element configured to control a current applied from the housing to the side surface member.