Asymmetrical Double-Fed Antenna Module With Segmented Ground Slit
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Solution Overview
Problem
In multi-antenna architectures, the increasing complexity and interference between antennas reduce transmission quality, making it challenging to design effective antenna systems that maintain high efficiency and isolation.
Innovation Solution
An asymmetrical double-fed antenna module is designed with a ground structure and two radiation portions, connected by a slit that forms an electrical path, allowing for adjustable frequency bands and improved isolation by optimizing the slit's length and width to reduce envelope correlation coefficient and enhance antenna efficiency and gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas are used to increase transmission rate, then transmission rate is improved, but antenna interference increases and transmission quality deteriorates
Solution Approach 1:
The ground structure is segmented into a first ground portion and a second ground portion separated by a first slit. This segmentation creates isolated ground regions for different antenna elements, reducing mutual interference while maintaining the benefits of multiple antennas for high transmission rates
Solution Approach 2:
A first slit is introduced as an intermediary element between the first and second ground portions. The slit acts as a barrier that blocks electromagnetic interference between antennas while allowing each antenna to maintain its own ground reference, thus improving transmission quality without sacrificing productivity
2Object-affected harmful factors
If antenna isolation is increased to reduce interference, then transmission quality is improved, but device complexity increases
Solution Approach 1:
The ground isolation structure is merged with the antenna assembly as an integrated unit. The first and second ground portions are directly connected to their respective antenna elements, eliminating the need for separate isolation structures and reducing overall device complexity while maintaining effective antenna isolation
Solution Approach 2:
The ground structure is designed with local quality variations - the first ground portion serves the first antenna element while the second ground portion serves the second antenna element. This localized ground assignment provides effective isolation without requiring complex global isolation structures
3Reliability
If slit dimensions are optimized to reduce envelope correlation coefficient, then antenna efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The first slit is designed with asymmetric dimensions - a specific length along the first direction and a specific width along the second direction perpendicular to the first direction. This asymmetric configuration allows optimization of the envelope correlation coefficient and antenna efficiency while being tolerant to manufacturing variations, as the asymmetric geometry provides robust performance across a range of dimensional tolerances
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 module achieves high efficiency and gain with reduced envelope correlation coefficient and improved isolation, suitable for various frequency bands, including TDD-LTE and WiMAX, while minimizing space and interference between antennas.
Implementation Method 1
The first radiation portion is configured to generate a first resonant mode of the antenna module accompanied with the first ground structure
Implementation Method 2
The second radiation portion is configured to generate a second resonant mode of the antenna module in a manner of coupling with the first radiation portion
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
An antenna module (100) includes a first ground structure (110), a first radiation portion (120) and a second radiation portion (130). The first ground structure includes a first ground portion (112), a second ground portion (114) and a first slit (G1) arranged between the first ground portion and the second ground portion. The first radiation portion is configured to generate a first resonant mode accompanied with the first ground structure, including a first feeding terminal (121) configured to send and receive a first antenna signal, and a first grounding terminal (123) coupled to the first ground portion. The second radiation portion is configured to generate a second resonant mode in a manner of coupling with the first radiation portion, including a second feeding terminal (131) configured to send and receive a second antenna signal, and a second grounding terminal (133) coupled to the second ground portion.