Antenna Ground Slot Layout for 5G MIMO Bandwidth and Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing antenna designs fail to meet the high operating bandwidth and high isolation requirements of 5G NR standard in the sub-7 GHz frequency band, particularly in multi-input multi-output (MIMO) systems.
Innovation Solution
The antenna structure includes a substrate with perpendicular transmission lines connected to radiation parts and a metal ground with strategically positioned resonance and isolation slots, enhancing isolation and bandwidth by resonating with the antenna units and blocking signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a general antenna design is used, then the bandwidth requirement can be fulfilled, but the isolation between antennas is insufficient
Solution Approach 1:
The ground plane is segmented by introducing isolation slots that divide the continuous ground structure into separate regions. These slots are positioned between adjacent antenna units to electrically isolate them, reducing mutual coupling while preserving the bandwidth performance of each antenna element
Solution Approach 2:
Isolation slots are introduced as intermediary structures between adjacent antenna units. These slots act as electromagnetic barriers that block signal coupling between antennas while maintaining the overall antenna system's bandwidth characteristics
2Productivity
If antenna units are placed close together for MIMO systems, then system integration is improved, but signal interference between antennas increases
Solution Approach 1:
The ground plane is divided into isolated regions using slots positioned between antenna units. This segmentation allows compact antenna placement for MIMO integration while preventing signal interference through the electromagnetic barrier created by the slot divisions
Solution Approach 2:
The ground plane structure is modified locally at specific positions between antenna units by introducing isolation slots. This local modification provides targeted interference suppression without affecting the overall performance or requiring changes to the entire ground structure
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 configuration significantly increases the operating bandwidth and isolation between antennas, meeting the 5G NR standard's requirements with improved signal blocking and frequency band coverage.
Implementation Method 1
a resonance slot is disposed on the metal ground, and which position corresponds between projection of the first transmission line toward the metal ground and the edge
Implementation Method 2
at least one isolation slot is disposed on the at least one metal ground, and which position respectively corresponds between projections of the adjacent two of the at least two antenna units toward the at least one metal ground
Data Source
AI summary
An antenna structure is provided, which includes a substrate, an antenna unit and a metal ground. The substrate includes a first surface and a second surface; the antenna unit disposed on the first surface includes a radiation part, a feeding part and a feeding line, where the feeding line includes a first transmission line and a second transmission line that are perpendicular to each other and connected to each other, and the first transmission line is connected to the radiation part via the feeding part; and the metal ground disposed on the second surface has an edge which is perpendicular to projection of the radiation part to the metal ground; and a resonance slot is disposed on the metal ground, and its position corresponds between projection of the second transmission line to the metal ground and the edge.