Multi-Mode Antenna Structure for Wideband Coverage in Tight Spaces
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Solution Overview
Problem
Conventional antennas in electronic devices, particularly mobile phones, struggle to cover multiple communication frequency bands due to reduced space caused by advancements in curved and flexible displays, making it difficult to meet performance requirements.
Innovation Solution
An antenna structure is designed with specific metal and conductive segments, gaps, and feed circuits that allow for multiple resonance modes, utilizing a symmetric and anti-symmetric feed manner to cover a wide range of frequency bands while minimizing space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional antenna design is used, then antenna arrangement space is reduced due to curved and flexible displays, but the ability to cover multiple frequency bands deteriorates
Solution Approach 1:
The antenna structure is divided into multiple metal segments (first metal segment, second metal segment, third metal segment, fourth metal segment) that can be independently configured. Each segment can be selectively connected or disconnected through switching circuits, allowing the antenna to form different radiation patterns and cover multiple frequency bands within a limited space area.
Solution Approach 2:
The antenna structure incorporates switching circuits that dynamically reconfigure the connections between metal segments based on the required frequency band. This dynamic reconfiguration allows the same physical antenna structure to adapt to different communication standards and frequency requirements, maintaining multi-band coverage capability despite space constraints.
2Area of stationary object
If antenna structure is simplified to save space, then space requirement is reduced, but the number of resonance modes and frequency band coverage deteriorates
Solution Approach 1:
The antenna structure is designed with multiple metal segments that can serve multiple functions simultaneously. By selectively activating different segments and connection configurations, the same antenna structure can generate multiple resonance modes and cover different frequency bands, achieving multi-functionality within a compact design space.
Solution Approach 2:
The antenna utilizes three-dimensional spatial arrangement of metal segments with gaps positioned at specific locations. By exploiting the third dimension and spatial relationships between segments, the antenna generates multiple resonance modes without increasing the planar footprint, effectively using vertical and depth dimensions to achieve frequency diversity.
3Adaptability or versatility
If multiple antennas are used to cover frequency bands, then frequency band coverage is improved, but device complexity and space consumption increase
Solution Approach 1:
Multiple antenna functions are merged into a single integrated antenna structure consisting of four metal segments that can be collectively controlled. Instead of using separate physical antennas for different frequency bands, the invention combines multiple radiation elements and switching circuits into one unified structure, reducing overall device complexity while maintaining multi-band coverage capability.
4Area of stationary object
If antenna elements are tightly arranged, then space utilization is improved, but isolation between antenna modes and signal quality deteriorate
Solution Approach 1:
Gaps are introduced as intermediary elements between adjacent metal segments in the tightly arranged antenna structure. These gaps act as electromagnetic isolators that prevent excessive coupling between segments while maintaining compact overall dimensions. The gaps serve as mediators that allow tight spatial arrangement without compromising signal quality or inter-segment isolation.
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 antenna structure effectively covers a plurality of frequency bands with high isolation and low envelope correlation coefficient, ensuring efficient signal transmission and reception despite limited space constraints.
Implementation Method 1
the antenna structure may be excited to generate a plurality of resonance modes, so that an antenna may cover a plurality of frequency bands
Data Source
AI summary
An antenna structure including a slot antenna and a wire antenna is disposed, and the antenna structure is excited to generate four antenna modes: a common mode slot antenna, a differential mode slot antenna, a common mode wire antenna, and a differential mode wire antenna in a symmetric feed manner and an anti-symmetric feed manner.