Dual Antenna Array Spacing for High-Isolation IAB Nodes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The low isolation between the MT antenna and the DU antenna in IAB nodes leads to inefficient use of spectrum resources, as these nodes typically operate in frequency division duplex or time division duplex modes, preventing simultaneous signal reception and transmission in the same frequency band.
Innovation Solution
The proposed antenna system improves isolation between the MT and DU antennas by using two antenna arrays with specific spacings between their rows, determined by the wavelength and feeding phase differences, allowing for simultaneous signal processing in the same frequency band without the need for metal fences or metal strip arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal fences and metal strip arrays are used to reduce interference between antennas, then isolation between MT and DU antennas is improved, but device complexity and space occupation increase
Solution Approach 1:
The patent extracts and removes the metal fences and metal strip arrays from the antenna system. Instead of using these complex electromagnetic shielding structures, the invention relies on the inherent spatial separation and geometric arrangement of the antenna elements themselves to achieve isolation, thereby eliminating unnecessary structural complexity while maintaining reliable interference reduction
Solution Approach 2:
The patent changes the spatial parameters of the antenna system by optimizing the spacing between adjacent antenna elements in different rows. By carefully controlling these geometric parameters and combining them with specific feeding phase differences, the system achieves effective isolation without requiring additional shielding structures, thus resolving the contradiction between reliability and device complexity
2Reliability
If metal fences and metal strip arrays are used to reduce interference between antennas, then isolation between MT and DU antennas is improved, but available space for other components is reduced
Solution Approach 1:
The patent removes the metal fences and metal strip arrays that would otherwise occupy significant space in the antenna system. By eliminating these external shielding structures and using only the essential antenna elements with optimized spacing, the invention maximizes the available space for other IAB node components while maintaining effective isolation between MT and DU antennas
Solution Approach 2:
The patent merges the isolation function directly into the antenna element arrangement itself. Instead of having separate shielding structures (metal fences and strip arrays), the isolation capability is integrated into the geometric configuration and spacing of the antenna elements, thereby eliminating redundant space occupation while achieving the same isolation objective
3Object-affected harmful factors
If frequency division duplex or time division duplex mode is used due to low antenna isolation, then interference between antennas is reduced, but spectrum resource utilization decreases
Solution Approach 1:
The patent changes the spatial parameters of the antenna system by optimizing the spacing between adjacent antenna elements in different rows. By carefully controlling these geometric parameters and combining them with specific feeding phase differences, the system achieves effective isolation, enabling full-duplex operation and maximizing spectrum resource utilization without requiring frequency or time division
4Reliability
If spacing between antenna rows is increased to reduce interference, then isolation between antennas is improved, but antenna array size increases
Solution Approach 1:
The patent optimizes the spacing parameters between adjacent antenna elements in different rows to achieve the minimum effective separation distance. By combining this optimized spacing with specific feeding phase differences, the system achieves effective isolation while minimizing the overall antenna array area, avoiding excessive space occupation
Data Source
AI summary
An antenna system includes a first antenna array on a first side, and a second antenna array on a second side. A first spacing is between two adjacent rows of antenna elements of the first antenna array in a target direction is determined based on a wavelength and a first feeding phase difference between the two adjacent rows of antenna elements of the first antenna array in the target direction. A second spacing is between two adjacent rows of antenna elements of the second antenna array in the target direction is determined based on the wavelength and a second feeding phase difference between the two adjacent rows of antenna elements of the second antenna array in the target direction. The target direction points from the first side to the second side. The wavelength is corresponds to an operating frequency band of the first antenna array and the second antenna array.