Mobile Terminal Antenna Cavity Design for 5G Layout
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Solution Overview
Problem
The challenge in mobile terminal design is to create an antenna that can operate effectively in limited space with low clearance requirements, especially as 5G frequency bands introduce new layout constraints, while maintaining radiation functionality.
Innovation Solution
A mobile terminal antenna design featuring a conductive support with multiple portions forming a cavity, a feeding part to excite current flow, and a distributed capacitor and inductor configuration, allowing for electromagnetic wave radiation through a gap, which enables efficient electromagnetic wave signal transmission with flexible layout options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the screen size is increased to improve display quality, then the display performance is improved, but the antenna space decreases
Solution Approach 1:
The patent transitions antenna layout from traditional horizontal/vertical edges to the side frame dimension, utilizing the lateral space between display and back cover. This dimensional shift allows antenna integration without compromising screen size or display quality.
Solution Approach 2:
The antenna structure is nested within the side frame cavity, utilizing the space between the display assembly and back cover. The conductive support forms a cavity that houses the antenna elements, effectively nesting the antenna system within the terminal's existing structural envelope.
2Adaptability or versatility
If MIMO antennas and 5G frequency bands are added to meet communication standards, then the communication capability is improved, but the antenna layout requirements increase
Solution Approach 1:
The side frame cavity structure serves multiple functions: it provides mechanical support, defines the antenna radiation space, and enables MIMO antenna configuration for multiple frequency bands including 5G. This universal structure simplifies the overall antenna system design.
Solution Approach 2:
The conductive support is divided into multiple portions (first, second, third, and fourth portions) that collectively form the cavity. This segmentation allows flexible configuration of antenna elements within different regions of the cavity to support MIMO and multiple frequency bands.
3Area of stationary object
If the antenna is placed in a position with poor clearance to save space, then the space utilization is improved, but the radiation performance deteriorates
Solution Approach 1:
The conductive support acts as an intermediary structure that creates a controlled cavity environment for the antenna. This cavity provides the necessary electromagnetic boundaries and radiation path, enabling good radiation performance even when the antenna is positioned in areas with limited clearance to other components.
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 allows for effective electromagnetic wave radiation in constrained spaces, expanding antenna layout possibilities and maintaining performance even in environments with poor clearance, supporting multiple frequency bands including 5G standards.
Implementation Method 1
The feeding part is electrically connected to the conductive support, and is configured to feed an electromagnetic wave signal, and excite the conductive support to generate a current, and a strong electric field is formed at the gap
Implementation Method 2
A distributed capacitor is formed through the gap, and a current loop inductor is formed by using the conductive support, to form a resonance mode, so as to radiate an electromagnetic wave signal
Data Source
Figure 1~2
Figure 3A
Figure 3B
AI summary
This application relates to an antenna and a mobile terminal, where the antenna includes a conductive support and a feeding part. The conductive support includes a first portion, a second portion, a third portion, and a fourth portion that are all made of conductive materials and that jointly enclose a cavity. The first portion and the third portion are disposed opposite to each other and are respectively connected to a head end and a tail end of the second portion, and the fourth portion and the second portion are disposed opposite to each other. The second portion is disposed on an inner side of a display of the mobile terminal, the third portion is a part of a side frame of the mobile terminal, and the fourth portion is located on an outer side or an inner side of a back cover of the mobile terminal, or is a part of the back cover. The conductive support is provided with a gap, the gap is disposed between the fourth portion and the first portion, or is disposed in the fourth portion. The feeding part is configured to feed an electromagnetic wave signal, and excite the conductive support to generate a current, and the antenna can radiate an electromagnetic wave signal by the configuration of the cavity and the gap. The antenna provided in this application has a low requirement on a clearance environment, and can meet an antenna radiation function.