PCB Antenna Layout With Housing Slits Against Dielectric Interference
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Solution Overview
Problem
As electronic devices become thinner and include more components, it is challenging to position antennas effectively while minimizing electrical interference from external dielectrics and ensuring optimal radiation performance across desired frequency bands.
Innovation Solution
The electronic device incorporates a housing with a conductive area and an antenna structure featuring a printed circuit board with slits, positioned in a way that reduces the influence of external dielectrics on radio wave transmission and reception, including a design where the antenna elements are closer to the exterior surface than the opposing surface, and the housing includes non-conductive parts to minimize electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of antennas is increased to support various communication technologies, then communication capability is improved, but device complexity and space utilization are worsened
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated antenna structure that supports multiple communication technologies (5G, Wi-Fi, Bluetooth, etc.) simultaneously. The antenna is designed with multiple radiating elements and can operate across different frequency bands, eliminating the need for separate antennas for each communication standard.
Solution Approach 2:
The antenna structure is designed to perform multiple functions - it can operate as a 5G antenna, Wi-Fi antenna, Bluetooth antenna, and other communication antennas depending on the activated frequency bands and communication modes. This multi-functional design reduces the overall number of antennas needed in the device.
2Length of moving object
If the electronic device is made thinner, then portability is improved, but antenna positioning and radiation performance are worsened
Solution Approach 1:
The patent positions the antenna elements in three-dimensional space within the thin device body, utilizing vertical stacking and angular arrangements. The antenna structure extends in multiple dimensions (length, width, and thickness) to achieve adequate radiation performance despite the limited overall device thickness.
Solution Approach 2:
The antenna design incorporates specific geometric features such as curved surfaces, varying thickness regions, and strategically positioned radiating elements within the housing. These local structural variations optimize the electromagnetic field distribution and radiation characteristics within the constrained thin form factor.
3Reliability
If antenna elements are positioned closer to the exterior surface, then radiation performance is improved, but susceptibility to external dielectric interference is worsened
Solution Approach 1:
The patent introduces a conductive structure (such as a conductive layer or mesh) positioned between the antenna elements and the external environment. This intermediary conductive structure acts as an electromagnetic shield, blocking the direct path of electromagnetic waves between external dielectrics (like human hands) and the antenna elements, thereby reducing interference while allowing the antenna to maintain its radiation performance.
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 enhances antenna radiation performance and coverage by reducing the impact of external dielectrics, maintaining effective radio wave transmission and reception while maintaining a slim form factor.
Implementation Method 1
a housing including a conductive area forming an exterior of the electronic device... The conductive area includes at least one slit extending from the at least one opening
Data Source
AI summary
An electronic device is provided. The electronic device includes a housing including a conductive area forming an exterior of the electronic device, and an antenna structure positioned in the inner space of the housing, the antenna structure including a printed circuit board including a first surface facing at least one opening formed in the conductive area in correspondence to the antenna structure, and a second surface facing the direction opposite to the first surface, and at least one antenna element positioned on the first surface or positioned inside the printed circuit board so as to be closer to the first surface than to the second surface, wherein the conductive area includes at least one slit extending from the at least one opening.