Self-Decoupling Wideband Antenna Layout for Compact Terminal Isolation
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Solution Overview
Problem
Terminal devices face challenges in accommodating multiple frequency bands due to limited space, requiring multiple antennas with adequate isolation, leading to tight space layout and increased electromagnetic radiation.
Innovation Solution
A self-decoupling wideband antenna system utilizing a first and third radiation stub with a second radiation stub acting as a parasitic element, allowing shared use across different frequency bands and enhancing isolation, thus reducing size and electromagnetic radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antennas are distributed on different side edges to improve isolation, then isolation between antennas is improved, but space layout becomes tight and device size increases
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated antenna structure that supports multiple frequency bands (2.4G, 5G, 6G Wi-Fi) simultaneously. The antenna uses a unified feeding structure with multiple radiation elements that can operate across different frequency bands, eliminating the need for separate antennas for each band and thus improving isolation while maintaining compact space layout.
Solution Approach 2:
The antenna is designed as a universal multi-functional structure that can operate across multiple frequency bands (2.4G, 5G, and 6G Wi-Fi bands) using a single feeding point and integrated radiation elements. This multi-functionality allows the antenna to replace multiple separate antennas, achieving both compact layout and adequate isolation between different frequency band operations.
2Reliability
If distance between antennas is increased to improve isolation, then isolation between antennas is improved, but device size increases
Solution Approach 1:
The patent merges multiple antenna functions into a single integrated structure with unified feeding and multiple radiation elements. By combining what would traditionally require separate physically distant antennas into one compact multi-band structure, the invention achieves adequate isolation between frequency bands without increasing device length.
Solution Approach 2:
The antenna structure utilizes three-dimensional space efficiently with radiation elements arranged in different spatial orientations and dimensions. The feeding structure extends in multiple directions with radiation elements positioned at different heights and angles, allowing compact integration while maintaining electromagnetic isolation through spatial separation rather than simple linear distance.
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 system supports a wider operating frequency band with improved isolation and reduced size, facilitating compact layout and lower specific absorption ratio (SAR) values.
Implementation Method 1
the second radiation stub can not only be used as a single radiator, but also be used as a parasitic radiator of another radiation stub
Implementation Method 2
a resonant state can be achieved under the excitation of a plurality of different frequency band signals, thereby supporting a wider operating frequency band
Implementation Method 3
the use of a main radiation stub plus a parasitic radiation stub allows current distribution in the antenna system to be more dispersed, thereby reducing an SAR value
Data Source
AI summary
A self-decoupling wideband antenna system and a terminal device, including: a first end of a first radiation stub that is connected to a first ground point, and the first radiation stub is further connected to a first feed point; a first end of a second radiation stub and a first end of a third radiation stub are connected to a second ground point, and a slot is provided between a second end of the second radiation stub and a second end of the first radiation stub. A distance between the second end of the second radiation stub and the second end of the first radiation stub is less than a distance between the first end of the second radiation stub and the second end of the first radiation stub.